Estimate a webhook subscription JSON Schema

Source OpenAPI: 0xArchive API 1.9.0; 230 paths; 228 component schemas. How often would this configuration have fired over the last lookback_days? Returns the total, a count per day of the window, the median and busiest day, the distribution of the event’s primary metric, a ladder of what the daily rate would be at other thresholds, and a sample of real matches, so a threshold can be chosen against history rather than guessed. The configuration is validated and normalised exactly as a create. Nothing is stored and no delivery is sent. Available for account.fill, account.transfer, account.liquidated, market.liquidation, market.pga_payment, hip4.settlement, market.liquidation_burst, market.oi_delta, oracle.jump and market.funding_flip; another type is refused with the list of the ones that work. An address scoped type needs at least one watched wallet to report on. Authenticate with an API key or a signed-in dashboard session. Available on every plan, including Free, and metered like the market data it returns. At most six estimates and dry-runs a minute per account, shared between the two.

Route Metadata

Field	Value
Method	`POST`
Path	`/v1/webhooks/subscriptions/estimate`
operationId	`estimateWebhookSubscription`
Tag	Webhooks - Previews
Family	Webhooks
Deprecated or legacy	no

Human endpoint reference

Open POST /v1/webhooks/subscriptions/estimate for authentication, parameters, responses, and examples.

Request Parameters

Header Parameters

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "estimateWebhookSubscription header parameters",
  "type": "object",
  "properties": {
    "0xArchive-Version": {
      "description": "Selects the 2026-10 response contract. Send `2026-10-01`; any dated version on or after it selects the same shapes. Without the header every response keeps its existing shape. With it:\n\n- The data quality routes, `/v1/status/coverage` and `/v1/symbols` answer the standard `{success, data, meta}` envelope.\n- Record times that are integer milliseconds by default become RFC 3339 UTC strings with millisecond precision, and the integer moves to a `*_ms` field: L4 resting-order `timestamp` (`timestamp_ms`), CVD buckets, HIP-3 oracle reads, Lighter and Lighter on Robinhood Chain liquidations and liquidation volume. Levels and trigger-levels `snapshot_ts` become RFC 3339 with `snapshot_ts_ms`.\n- Error bodies carry the contract `error_code` names: `invalid_parameter` instead of `invalid_query_params` and `invalid_path_params`, `historical_depth_exceeded` instead of `history_window_exceeded`, and `historical_range_exceeded` instead of `request_range_exceeded`; a malformed cursor that fails to parse answers 400 `invalid_cursor` instead of `invalid_query_params`. With `0xArchive-Version: 2026-10-01`, malformed cursors on trades, liquidations, L2 and L4 diffs, order history, TP/SL and order-flow routes answer 400 `invalid_cursor`. Without the header, the first six route families treat a malformed cursor as no cursor and return the first page; order flow answers 400 `invalid_query_params`. Malformed trade time inputs answer 400 `invalid_time_range` with the header and 400 `invalid_query_params` without it.\n\nThe response echoes the selected version in its own `0xArchive-Version` header.",
      "type": "string",
      "enum": [
        "2026-10-01"
      ],
      "example": "2026-10-01",
      "x-parameter-location": "header"
    }
  }
}

Request Body

application/json

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "estimateWebhookSubscription request body",
  "description": "A would-be subscription to evaluate against history. Same shape as a create, without the endpoint, plus the window.",
  "type": "object",
  "required": [
    "event_type"
  ],
  "properties": {
    "config": {
      "description": "Rule configuration to evaluate. `filters` is accepted as an alias.",
      "allOf": [
        {
          "description": "What a subscription matches on. Every key is checked against the event type's catalog declaration, so an unknown key, an undeclared parameter or a condition on an undeclared metric is refused rather than ignored. The stored config is the normalised form: venues and addresses lowercased, declared parameters filled in at their defaults, and operators written in their canonical spelling.",
          "type": "object",
          "properties": {
            "addresses": {
              "description": "Wallets to match, for an address scoped event type. Every address must already be on your watched list. Omit to match all of them.",
              "type": "array",
              "items": {
                "type": "string"
              },
              "example": [
                "0x6b9e773128f453f5c2c60935ee2de2cbc5390a24"
              ]
            },
            "conditions": {
              "description": "Conditions on the event's metrics, all of which must hold for a delivery. At most 16 per subscription.",
              "type": "array",
              "items": {
                "description": "One condition on an event metric. The operator vocabulary is grouped by the metric's type; see `operators` on the event type.",
                "type": "object",
                "required": [
                  "metric",
                  "op"
                ],
                "properties": {
                  "metric": {
                    "description": "A metric declared by the event type.",
                    "type": "string",
                    "example": "notional_usd"
                  },
                  "op": {
                    "description": "Comparison to apply. Symbol spellings such as `>=` are accepted on the way in and stored in the canonical spelling shown here.",
                    "type": "string",
                    "enum": [
                      "greater_than",
                      "greater_than_or_equal",
                      "less_than",
                      "less_than_or_equal",
                      "equal",
                      "not_equal",
                      "between",
                      "not_between",
                      "in",
                      "not_in",
                      "contains",
                      "not_contains",
                      "starts_with",
                      "ends_with",
                      "before",
                      "after",
                      "is_empty",
                      "is_not_empty"
                    ],
                    "example": "greater_than_or_equal"
                  },
                  "value": {
                    "description": "What to compare against. A number, string, boolean or RFC 3339 timestamp for a single value comparison; a two entry `[low, high]` list for `between` and `not_between`; a non-empty list for `in` and `not_in`. Omitted for `is_empty` and `is_not_empty`.",
                    "example": 100000
                  }
                }
              }
            },
            "min_notional_usd": {
              "description": "Shorthand for a `notional_usd` at-or-above condition, kept for compatibility. It is stored as a condition, and it is mirrored back here as the loosest notional lower bound the config carries.",
              "type": "number",
              "example": 100000
            },
            "params": {
              "description": "Parameter values for the event type, keyed by the parameter names it declares. A declared parameter you leave out is stored at its default. A declared parameter may also be written at the top level of the config.",
              "type": "object",
              "additionalProperties": true,
              "example": {
                "max_age_s": 3600
              }
            },
            "symbols": {
              "description": "Instrument symbols to match. Omit to match every symbol.",
              "type": "array",
              "items": {
                "type": "string"
              },
              "example": [
                "BTC",
                "ETH"
              ]
            },
            "venue": {
              "description": "Venue or venues to match, from the event type's `venues` list. Accepts a single string, a pipe separated string or a list. Omit to match every covered venue.",
              "oneOf": [
                {
                  "type": "string"
                },
                {
                  "type": "array",
                  "items": {
                    "type": "string"
                  }
                }
              ],
              "example": "hyperliquid"
            }
          }
        }
      ]
    },
    "event_type": {
      "description": "Event type to evaluate.",
      "type": "string",
      "example": "market.liquidation"
    },
    "filters": {
      "description": "Alias of `config`. Send one or the other.",
      "allOf": [
        {
          "description": "What a subscription matches on. Every key is checked against the event type's catalog declaration, so an unknown key, an undeclared parameter or a condition on an undeclared metric is refused rather than ignored. The stored config is the normalised form: venues and addresses lowercased, declared parameters filled in at their defaults, and operators written in their canonical spelling.",
          "type": "object",
          "properties": {
            "addresses": {
              "description": "Wallets to match, for an address scoped event type. Every address must already be on your watched list. Omit to match all of them.",
              "type": "array",
              "items": {
                "type": "string"
              },
              "example": [
                "0x6b9e773128f453f5c2c60935ee2de2cbc5390a24"
              ]
            },
            "conditions": {
              "description": "Conditions on the event's metrics, all of which must hold for a delivery. At most 16 per subscription.",
              "type": "array",
              "items": {
                "description": "One condition on an event metric. The operator vocabulary is grouped by the metric's type; see `operators` on the event type.",
                "type": "object",
                "required": [
                  "metric",
                  "op"
                ],
                "properties": {
                  "metric": {
                    "description": "A metric declared by the event type.",
                    "type": "string",
                    "example": "notional_usd"
                  },
                  "op": {
                    "description": "Comparison to apply. Symbol spellings such as `>=` are accepted on the way in and stored in the canonical spelling shown here.",
                    "type": "string",
                    "enum": [
                      "greater_than",
                      "greater_than_or_equal",
                      "less_than",
                      "less_than_or_equal",
                      "equal",
                      "not_equal",
                      "between",
                      "not_between",
                      "in",
                      "not_in",
                      "contains",
                      "not_contains",
                      "starts_with",
                      "ends_with",
                      "before",
                      "after",
                      "is_empty",
                      "is_not_empty"
                    ],
                    "example": "greater_than_or_equal"
                  },
                  "value": {
                    "description": "What to compare against. A number, string, boolean or RFC 3339 timestamp for a single value comparison; a two entry `[low, high]` list for `between` and `not_between`; a non-empty list for `in` and `not_in`. Omitted for `is_empty` and `is_not_empty`.",
                    "example": 100000
                  }
                }
              }
            },
            "min_notional_usd": {
              "description": "Shorthand for a `notional_usd` at-or-above condition, kept for compatibility. It is stored as a condition, and it is mirrored back here as the loosest notional lower bound the config carries.",
              "type": "number",
              "example": 100000
            },
            "params": {
              "description": "Parameter values for the event type, keyed by the parameter names it declares. A declared parameter you leave out is stored at its default. A declared parameter may also be written at the top level of the config.",
              "type": "object",
              "additionalProperties": true,
              "example": {
                "max_age_s": 3600
              }
            },
            "symbols": {
              "description": "Instrument symbols to match. Omit to match every symbol.",
              "type": "array",
              "items": {
                "type": "string"
              },
              "example": [
                "BTC",
                "ETH"
              ]
            },
            "venue": {
              "description": "Venue or venues to match, from the event type's `venues` list. Accepts a single string, a pipe separated string or a list. Omit to match every covered venue.",
              "oneOf": [
                {
                  "type": "string"
                },
                {
                  "type": "array",
                  "items": {
                    "type": "string"
                  }
                }
              ],
              "example": "hyperliquid"
            }
          }
        }
      ]
    },
    "lookback_days": {
      "description": "Days of history to evaluate, ending now. Between 1 and 30; a value outside that range is refused with a 400. Some event types evaluate a shorter window (for example 7 days for `account.fill`); the response's `days` and `basis.note` then say so.",
      "type": "integer",
      "format": "int64",
      "default": 7,
      "minimum": 1,
      "maximum": 30,
      "example": 7
    }
  }
}

Response Contracts

Status 200

How often the configuration would have fired

application/json

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "estimateWebhookSubscription response 200",
  "description": "API response containing a subscription estimate.",
  "type": "object",
  "properties": {
    "data": {
      "description": "How often a would-be subscription would have fired over the requested window. Nothing is stored and no delivery is sent.",
      "type": "object",
      "required": [
        "basis",
        "days",
        "event_type",
        "ladder",
        "per_day",
        "per_day_max",
        "per_day_p50",
        "sample",
        "total",
        "window"
      ],
      "properties": {
        "basis": {
          "description": "How the estimate was produced, so the numbers can be read for what they are.",
          "type": "object",
          "required": [
            "mode"
          ],
          "properties": {
            "mode": {
              "description": "`exact` counted every occurrence in the window. `sampled` scaled the counts from a capped scan, and the note says by how much. `replayed` re-ran a windowed rule over history at your own parameters.",
              "type": "string",
              "enum": [
                "exact",
                "sampled",
                "replayed"
              ],
              "example": "exact"
            },
            "note": {
              "description": "What qualifies the numbers, when anything does.",
              "type": "string",
              "nullable": true
            }
          }
        },
        "days": {
          "description": "Days the answer covers. Shorter than requested when the event type carries a shorter cap.",
          "type": "integer",
          "format": "int64",
          "example": 7
        },
        "distribution": {
          "description": "Quantiles of the primary metric. Null when the type has no primary metric or nothing matched.",
          "nullable": true,
          "allOf": [
            {
              "description": "Quantiles of the primary metric over the matched occurrences, for choosing a threshold against real history.",
              "type": "object",
              "required": [
                "max",
                "n",
                "p50",
                "p90",
                "p99"
              ],
              "properties": {
                "max": {
                  "description": "Largest value seen.",
                  "type": "number",
                  "example": 4210000
                },
                "n": {
                  "description": "Occurrences the quantiles are computed over.",
                  "type": "integer",
                  "format": "int64",
                  "example": 842
                },
                "p50": {
                  "description": "Median.",
                  "type": "number",
                  "example": 18400
                },
                "p90": {
                  "description": "90th percentile.",
                  "type": "number",
                  "example": 132000
                },
                "p99": {
                  "description": "99th percentile.",
                  "type": "number",
                  "example": 910000
                }
              }
            }
          ]
        },
        "event_type": {
          "description": "Event type that was evaluated.",
          "type": "string",
          "example": "market.liquidation"
        },
        "ladder": {
          "description": "Ascending. Empty when there is no primary metric.",
          "type": "array",
          "items": {
            "description": "One rung of the threshold ladder: the daily rate the same configuration would have had at a different threshold.",
            "type": "object",
            "required": [
              "per_day",
              "value"
            ],
            "properties": {
              "per_day": {
                "description": "Deliveries a day at that threshold, everything else unchanged.",
                "type": "number",
                "example": 3.4
              },
              "value": {
                "description": "Threshold on the primary metric.",
                "type": "number",
                "example": 250000
              }
            }
          }
        },
        "per_day": {
          "description": "One entry per day, oldest first, zero filled. The last entry ends at the moment of the request.",
          "type": "array",
          "items": {
            "description": "One 24 hour bin of the estimate window.",
            "type": "object",
            "required": [
              "count",
              "date"
            ],
            "properties": {
              "count": {
                "description": "Occurrences that would have been delivered in the bin.",
                "type": "integer",
                "format": "int64",
                "example": 12
              },
              "date": {
                "description": "UTC date the bin ends on.",
                "type": "string",
                "format": "date",
                "example": "2026-09-19"
              }
            }
          }
        },
        "per_day_max": {
          "description": "Busiest day in the window.",
          "type": "integer",
          "format": "int64",
          "example": 26
        },
        "per_day_p50": {
          "description": "Median deliveries a day across the window.",
          "type": "number",
          "example": 11
        },
        "primary_metric": {
          "description": "The metric the ladder and the distribution are about. Null when the type has none.",
          "type": "string",
          "nullable": true,
          "example": "notional_usd"
        },
        "sample": {
          "description": "Newest matches first, in the same shape the dry-run returns.",
          "type": "array",
          "items": {
            "description": "One occurrence that would have been delivered, in the shape the delivered payload carries.",
            "type": "object",
            "required": [
              "data",
              "observed_at_estimate"
            ],
            "properties": {
              "data": {
                "description": "The occurrence body, the same `data` a delivery would carry.",
                "type": "object",
                "additionalProperties": true
              },
              "observed_at_estimate": {
                "description": "The occurrence's own timestamp. A real delivery's `observed_at` is this plus the time it takes to see the occurrence.",
                "type": "string",
                "format": "date-time"
              }
            }
          }
        },
        "total": {
          "description": "Occurrences that would have been delivered across the window.",
          "type": "integer",
          "format": "int64",
          "example": 84
        },
        "window": {
          "description": "The window a preview vouches for. It can start later than the one that was asked for when a scan reached its row cap.",
          "type": "object",
          "required": [
            "from",
            "to"
          ],
          "properties": {
            "from": {
              "description": "Start of the window the answer covers.",
              "type": "string",
              "format": "date-time"
            },
            "to": {
              "description": "End of the window, which is the moment of the request.",
              "type": "string",
              "format": "date-time"
            }
          }
        }
      }
    },
    "success": {
      "type": "boolean",
      "example": true
    }
  }
}

Status 400

Invalid request: a parameter, symbol, interval, cursor or time range failed validation. See error_code.

application/json

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "estimateWebhookSubscription response 400",
  "description": "Body of every non-2xx JSON response. `code` repeats the HTTP status, `error_code` is the stable machine-readable code (see `ErrorCode`), `error` is a human-readable message, and `request_id` identifies the request for support. Validation failures add `param` and, where the accepted set is fixed, `valid_values`. A 404 for a datatype the venue does not offer (`unsupported_for_venue`) adds `venue`, `datatype` and `available_on`; any other unknown path answers 404 `route_not_found`.",
  "type": "object",
  "required": [
    "code",
    "error",
    "error_code",
    "request_id",
    "success"
  ],
  "properties": {
    "available_on": {
      "description": "`unsupported_for_venue` only: the venues and routes that serve the datatype.",
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "route",
          "venue"
        ],
        "properties": {
          "route": {
            "type": "string",
            "example": "/v1/hyperliquid/orders/{symbol}/flow"
          },
          "venue": {
            "type": "string",
            "example": "hyperliquid"
          }
        }
      }
    },
    "code": {
      "description": "HTTP status code.",
      "type": "integer",
      "example": 400
    },
    "credits_limit": {
      "description": "`insufficient_credits` only: the period's credit allowance.",
      "type": "integer",
      "format": "int64"
    },
    "credits_used": {
      "description": "`insufficient_credits` only: credits used this period.",
      "type": "integer",
      "format": "int64"
    },
    "datatype": {
      "description": "`unsupported_for_venue` only: the datatype the request asked for, as `GET /v1/capabilities` names it.",
      "type": "string",
      "example": "order_flow"
    },
    "error": {
      "description": "Human-readable message. Wording can change; do not parse it.",
      "type": "string"
    },
    "error_code": {
      "description": "Stable, machine-readable error code. Branch on this value, not on the `error` text.\n\n**Contract codes**\n\n| Code | HTTP | Meaning |\n|---|---|---|\n| `invalid_parameter` | 400 | A parameter failed to parse or validate. `param` names it and `valid_values` lists accepted values where the set is fixed. |\n| `invalid_symbol` | 400 | The symbol is not listed on this venue. |\n| `invalid_interval` | 400 | The `interval` (bucket width) is not one this route accepts. |\n| `invalid_cursor` | 400 | The `cursor` is malformed, stale, or was issued for other filters. Restart pagination without a cursor. Trades, liquidations, L2 and L4 diffs, order history and TP/SL routes currently return the first page for a malformed cursor instead. |\n| `invalid_time_range` | 400 | `start` is after `end`, or a time value could not be parsed. |\n| `range_before_coverage` | 400 | The whole requested range ends before the first instant this dataset is served from. |\n| `historical_range_exceeded` | 403 | The requested span is longer than the plan allows in one request or replay. |\n| `historical_depth_exceeded` | 403 | The request reaches further back than the plan's history window. |\n| `unsupported_for_venue` | 404 | The venue does not offer this datatype. The message, `datatype` and `available_on` name where it is served. |\n| `route_not_found` | 404 | No route matches the path or method. `GET /v1/capabilities` lists the routes each venue serves. |\n| `not_found` | 404 | The route exists but the requested resource (for example an incident, endpoint or outcome id) does not. |\n| `unauthorized` | 401 | The API key is missing or invalid. |\n| `forbidden` | 403 | The key is valid but not allowed to make this request. |\n| `insufficient_credits` | 429 | The monthly credit allowance is spent (402 on pay-per-request routes). |\n| `rate_limited` | 429 | Too many requests or concurrent queries. Retry after the interval in the rate-limit headers. |\n| `conflict` | 409 | The request conflicts with the current state of the resource. |\n| `upstream_unavailable` | 503 | A dependency is unavailable or saturated. Retry shortly; the response carries `Retry-After`. |\n| `internal_error` | 500 | An unexpected server error. Quote `request_id` when contacting support. |\n\n**WebSocket only** (sent in `{\"type\":\"error\"}` messages, never by REST)\n\n| Code | Where | Meaning |\n|---|---|---|\n| `endpoint_unsupported` | WebSocket | This WebSocket endpoint does not serve the channel or operation. The message names the endpoint that does. |\n| `slow_consumer` | WebSocket | The connection fell behind a stream and messages were dropped. Re-subscribe, or restart the replay, to resynchronise. |\n\n**Route-specific codes**\n\n| Code | HTTP | Meaning |\n|---|---|---|\n| `positions_unavailable` | 503 | Account positions are temporarily unavailable for this venue. |\n| `reconstruction_unavailable` | 503 | The as-of positions state for this instant cannot be reconstructed right now. |\n| `snapshot_advanced` | 409 | A positions market cursor pinned a snapshot that has since been replaced or expired. Restart pagination. |\n| `pagination_unavailable` | 503 | The next positions page cannot be served right now. Retry the same cursor shortly. |\n| `api_key_limit_reached` | 403 | The account already holds the maximum number of API keys for its plan. |\n| `wallet_requires_plan` | 402 | A wallet-authenticated key needs an active plan for this request. |\n| `wallet_account_required` | 403 | Wallet sign-in needs an existing account linked to the wallet. |\n| `wallet_free_signup_retired` | 410 | Free wallet sign-up is no longer offered. |\n| `account_disabled` | 403 | The account is disabled. |\n| `oauth_not_permitted` | 403 | This route is not available to OAuth access tokens. |\n| `insufficient_scope` | 403 | The OAuth access token lacks the scope this route requires. |\n\n**Legacy names.** Requests without `0xArchive-Version: 2026-10-01` keep the four names that predate the contract; with the header they receive the contract names instead.\n\n| Code | HTTP | Meaning |\n|---|---|---|\n| `invalid_query_params` | 400 | Legacy name of `invalid_parameter` (query parameter), or of `invalid_cursor` when the parameter is `cursor`, sent without the version header. |\n| `invalid_path_params` | 400 | Legacy name of `invalid_parameter` (path parameter), sent without the version header. |\n| `history_window_exceeded` | 403 | Legacy name of `historical_depth_exceeded`, sent without the version header. |\n| `request_range_exceeded` | 403 | Legacy name of `historical_range_exceeded`, sent without the version header. |\n\nTreat any value not listed here as a generic error of the HTTP status.",
      "type": "string",
      "enum": [
        "invalid_parameter",
        "invalid_symbol",
        "invalid_interval",
        "invalid_cursor",
        "invalid_time_range",
        "range_before_coverage",
        "historical_range_exceeded",
        "historical_depth_exceeded",
        "unsupported_for_venue",
        "route_not_found",
        "not_found",
        "unauthorized",
        "forbidden",
        "insufficient_credits",
        "rate_limited",
        "conflict",
        "upstream_unavailable",
        "internal_error",
        "endpoint_unsupported",
        "slow_consumer",
        "positions_unavailable",
        "reconstruction_unavailable",
        "snapshot_advanced",
        "pagination_unavailable",
        "api_key_limit_reached",
        "wallet_requires_plan",
        "wallet_account_required",
        "wallet_free_signup_retired",
        "account_disabled",
        "oauth_not_permitted",
        "insufficient_scope",
        "invalid_query_params",
        "invalid_path_params",
        "history_window_exceeded",
        "request_range_exceeded"
      ],
      "example": "invalid_parameter"
    },
    "max_concurrent": {
      "description": "`rate_limited` concurrency refusals only: simultaneous queries the plan allows.",
      "type": "integer"
    },
    "param": {
      "description": "The parameter that failed validation, when one did.",
      "type": "string",
      "example": "side"
    },
    "request_id": {
      "description": "Unique request ID for support.",
      "type": "string",
      "format": "uuid"
    },
    "success": {
      "description": "Always `false` on an error.",
      "type": "boolean",
      "enum": [
        false
      ]
    },
    "suggestion": {
      "description": "Present when the symbol exists on another venue: where to request it instead.",
      "type": "object",
      "properties": {
        "endpoint": {
          "type": "string",
          "example": "/v1/hyperliquid/hip3/trades/xyz:TSLA"
        },
        "symbol": {
          "type": "string",
          "example": "xyz:TSLA"
        },
        "venue": {
          "type": "string",
          "example": "hip3"
        }
      }
    },
    "valid_values": {
      "description": "Accepted values of `param`, when the set is fixed.",
      "type": "array",
      "items": {
        "type": "string"
      },
      "example": [
        "buy",
        "sell"
      ]
    },
    "venue": {
      "description": "`unsupported_for_venue` only: the venue the request asked.",
      "type": "string",
      "example": "spot"
    }
  }
}

OpenAPI example: `current_main`

{
  "code": 400,
  "error": "Failed to deserialize query string: limit: invalid digit found in string",
  "error_code": "invalid_query_params",
  "param": "limit",
  "request_id": "3f2a9c71-5b0e-4d68-9a4c-7e1d2b6f8a05",
  "success": false
}

OpenAPI example: `invalid_parameter`

{
  "success": false,
  "code": 400,
  "error_code": "invalid_parameter",
  "error": "Invalid side 'up'. Use buy or sell.",
  "request_id": "3f2a9c71-5b0e-4d68-9a4c-7e1d2b6f8a05",
  "param": "side",
  "valid_values": [
    "buy",
    "sell"
  ]
}

OpenAPI example: `invalid_symbol`

{
  "success": false,
  "code": 400,
  "error_code": "invalid_symbol",
  "error": "The symbol 'ZZZ' does not exist. Please see /v1/hyperliquid/instruments for available symbols.",
  "request_id": "3f2a9c71-5b0e-4d68-9a4c-7e1d2b6f8a05",
  "param": "symbol"
}

OpenAPI example: `invalid_time_range`

{
  "success": false,
  "code": 400,
  "error_code": "invalid_time_range",
  "error": "start must be <= end",
  "request_id": "3f2a9c71-5b0e-4d68-9a4c-7e1d2b6f8a05"
}

OpenAPI example: `legacy_invalid_query_params`

{
  "success": false,
  "code": 400,
  "error_code": "invalid_query_params",
  "error": "Failed to deserialize query string: limit: invalid digit found in string",
  "request_id": "3f2a9c71-5b0e-4d68-9a4c-7e1d2b6f8a05"
}

Status 401

Authentication required: the API key is missing or invalid.

application/json

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "estimateWebhookSubscription response 401",
  "description": "Body of every non-2xx JSON response. `code` repeats the HTTP status, `error_code` is the stable machine-readable code (see `ErrorCode`), `error` is a human-readable message, and `request_id` identifies the request for support. Validation failures add `param` and, where the accepted set is fixed, `valid_values`. A 404 for a datatype the venue does not offer (`unsupported_for_venue`) adds `venue`, `datatype` and `available_on`; any other unknown path answers 404 `route_not_found`.",
  "type": "object",
  "required": [
    "code",
    "error",
    "error_code",
    "request_id",
    "success"
  ],
  "properties": {
    "available_on": {
      "description": "`unsupported_for_venue` only: the venues and routes that serve the datatype.",
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "route",
          "venue"
        ],
        "properties": {
          "route": {
            "type": "string",
            "example": "/v1/hyperliquid/orders/{symbol}/flow"
          },
          "venue": {
            "type": "string",
            "example": "hyperliquid"
          }
        }
      }
    },
    "code": {
      "description": "HTTP status code.",
      "type": "integer",
      "example": 400
    },
    "credits_limit": {
      "description": "`insufficient_credits` only: the period's credit allowance.",
      "type": "integer",
      "format": "int64"
    },
    "credits_used": {
      "description": "`insufficient_credits` only: credits used this period.",
      "type": "integer",
      "format": "int64"
    },
    "datatype": {
      "description": "`unsupported_for_venue` only: the datatype the request asked for, as `GET /v1/capabilities` names it.",
      "type": "string",
      "example": "order_flow"
    },
    "error": {
      "description": "Human-readable message. Wording can change; do not parse it.",
      "type": "string"
    },
    "error_code": {
      "description": "Stable, machine-readable error code. Branch on this value, not on the `error` text.\n\n**Contract codes**\n\n| Code | HTTP | Meaning |\n|---|---|---|\n| `invalid_parameter` | 400 | A parameter failed to parse or validate. `param` names it and `valid_values` lists accepted values where the set is fixed. |\n| `invalid_symbol` | 400 | The symbol is not listed on this venue. |\n| `invalid_interval` | 400 | The `interval` (bucket width) is not one this route accepts. |\n| `invalid_cursor` | 400 | The `cursor` is malformed, stale, or was issued for other filters. Restart pagination without a cursor. Trades, liquidations, L2 and L4 diffs, order history and TP/SL routes currently return the first page for a malformed cursor instead. |\n| `invalid_time_range` | 400 | `start` is after `end`, or a time value could not be parsed. |\n| `range_before_coverage` | 400 | The whole requested range ends before the first instant this dataset is served from. |\n| `historical_range_exceeded` | 403 | The requested span is longer than the plan allows in one request or replay. |\n| `historical_depth_exceeded` | 403 | The request reaches further back than the plan's history window. |\n| `unsupported_for_venue` | 404 | The venue does not offer this datatype. The message, `datatype` and `available_on` name where it is served. |\n| `route_not_found` | 404 | No route matches the path or method. `GET /v1/capabilities` lists the routes each venue serves. |\n| `not_found` | 404 | The route exists but the requested resource (for example an incident, endpoint or outcome id) does not. |\n| `unauthorized` | 401 | The API key is missing or invalid. |\n| `forbidden` | 403 | The key is valid but not allowed to make this request. |\n| `insufficient_credits` | 429 | The monthly credit allowance is spent (402 on pay-per-request routes). |\n| `rate_limited` | 429 | Too many requests or concurrent queries. Retry after the interval in the rate-limit headers. |\n| `conflict` | 409 | The request conflicts with the current state of the resource. |\n| `upstream_unavailable` | 503 | A dependency is unavailable or saturated. Retry shortly; the response carries `Retry-After`. |\n| `internal_error` | 500 | An unexpected server error. Quote `request_id` when contacting support. |\n\n**WebSocket only** (sent in `{\"type\":\"error\"}` messages, never by REST)\n\n| Code | Where | Meaning |\n|---|---|---|\n| `endpoint_unsupported` | WebSocket | This WebSocket endpoint does not serve the channel or operation. The message names the endpoint that does. |\n| `slow_consumer` | WebSocket | The connection fell behind a stream and messages were dropped. Re-subscribe, or restart the replay, to resynchronise. |\n\n**Route-specific codes**\n\n| Code | HTTP | Meaning |\n|---|---|---|\n| `positions_unavailable` | 503 | Account positions are temporarily unavailable for this venue. |\n| `reconstruction_unavailable` | 503 | The as-of positions state for this instant cannot be reconstructed right now. |\n| `snapshot_advanced` | 409 | A positions market cursor pinned a snapshot that has since been replaced or expired. Restart pagination. |\n| `pagination_unavailable` | 503 | The next positions page cannot be served right now. Retry the same cursor shortly. |\n| `api_key_limit_reached` | 403 | The account already holds the maximum number of API keys for its plan. |\n| `wallet_requires_plan` | 402 | A wallet-authenticated key needs an active plan for this request. |\n| `wallet_account_required` | 403 | Wallet sign-in needs an existing account linked to the wallet. |\n| `wallet_free_signup_retired` | 410 | Free wallet sign-up is no longer offered. |\n| `account_disabled` | 403 | The account is disabled. |\n| `oauth_not_permitted` | 403 | This route is not available to OAuth access tokens. |\n| `insufficient_scope` | 403 | The OAuth access token lacks the scope this route requires. |\n\n**Legacy names.** Requests without `0xArchive-Version: 2026-10-01` keep the four names that predate the contract; with the header they receive the contract names instead.\n\n| Code | HTTP | Meaning |\n|---|---|---|\n| `invalid_query_params` | 400 | Legacy name of `invalid_parameter` (query parameter), or of `invalid_cursor` when the parameter is `cursor`, sent without the version header. |\n| `invalid_path_params` | 400 | Legacy name of `invalid_parameter` (path parameter), sent without the version header. |\n| `history_window_exceeded` | 403 | Legacy name of `historical_depth_exceeded`, sent without the version header. |\n| `request_range_exceeded` | 403 | Legacy name of `historical_range_exceeded`, sent without the version header. |\n\nTreat any value not listed here as a generic error of the HTTP status.",
      "type": "string",
      "enum": [
        "invalid_parameter",
        "invalid_symbol",
        "invalid_interval",
        "invalid_cursor",
        "invalid_time_range",
        "range_before_coverage",
        "historical_range_exceeded",
        "historical_depth_exceeded",
        "unsupported_for_venue",
        "route_not_found",
        "not_found",
        "unauthorized",
        "forbidden",
        "insufficient_credits",
        "rate_limited",
        "conflict",
        "upstream_unavailable",
        "internal_error",
        "endpoint_unsupported",
        "slow_consumer",
        "positions_unavailable",
        "reconstruction_unavailable",
        "snapshot_advanced",
        "pagination_unavailable",
        "api_key_limit_reached",
        "wallet_requires_plan",
        "wallet_account_required",
        "wallet_free_signup_retired",
        "account_disabled",
        "oauth_not_permitted",
        "insufficient_scope",
        "invalid_query_params",
        "invalid_path_params",
        "history_window_exceeded",
        "request_range_exceeded"
      ],
      "example": "invalid_parameter"
    },
    "max_concurrent": {
      "description": "`rate_limited` concurrency refusals only: simultaneous queries the plan allows.",
      "type": "integer"
    },
    "param": {
      "description": "The parameter that failed validation, when one did.",
      "type": "string",
      "example": "side"
    },
    "request_id": {
      "description": "Unique request ID for support.",
      "type": "string",
      "format": "uuid"
    },
    "success": {
      "description": "Always `false` on an error.",
      "type": "boolean",
      "enum": [
        false
      ]
    },
    "suggestion": {
      "description": "Present when the symbol exists on another venue: where to request it instead.",
      "type": "object",
      "properties": {
        "endpoint": {
          "type": "string",
          "example": "/v1/hyperliquid/hip3/trades/xyz:TSLA"
        },
        "symbol": {
          "type": "string",
          "example": "xyz:TSLA"
        },
        "venue": {
          "type": "string",
          "example": "hip3"
        }
      }
    },
    "valid_values": {
      "description": "Accepted values of `param`, when the set is fixed.",
      "type": "array",
      "items": {
        "type": "string"
      },
      "example": [
        "buy",
        "sell"
      ]
    },
    "venue": {
      "description": "`unsupported_for_venue` only: the venue the request asked.",
      "type": "string",
      "example": "spot"
    }
  }
}

OpenAPI example

{
  "success": false,
  "code": 401,
  "error_code": "unauthorized",
  "error": "Missing authentication credentials. Provide X-API-Key header or Bearer token.",
  "request_id": "3f2a9c71-5b0e-4d68-9a4c-7e1d2b6f8a05"
}

Status 429

Rate limit, concurrency limit or monthly credits exceeded. See error_code.

application/json

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "estimateWebhookSubscription response 429",
  "description": "Body of every non-2xx JSON response. `code` repeats the HTTP status, `error_code` is the stable machine-readable code (see `ErrorCode`), `error` is a human-readable message, and `request_id` identifies the request for support. Validation failures add `param` and, where the accepted set is fixed, `valid_values`. A 404 for a datatype the venue does not offer (`unsupported_for_venue`) adds `venue`, `datatype` and `available_on`; any other unknown path answers 404 `route_not_found`.",
  "type": "object",
  "required": [
    "code",
    "error",
    "error_code",
    "request_id",
    "success"
  ],
  "properties": {
    "available_on": {
      "description": "`unsupported_for_venue` only: the venues and routes that serve the datatype.",
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "route",
          "venue"
        ],
        "properties": {
          "route": {
            "type": "string",
            "example": "/v1/hyperliquid/orders/{symbol}/flow"
          },
          "venue": {
            "type": "string",
            "example": "hyperliquid"
          }
        }
      }
    },
    "code": {
      "description": "HTTP status code.",
      "type": "integer",
      "example": 400
    },
    "credits_limit": {
      "description": "`insufficient_credits` only: the period's credit allowance.",
      "type": "integer",
      "format": "int64"
    },
    "credits_used": {
      "description": "`insufficient_credits` only: credits used this period.",
      "type": "integer",
      "format": "int64"
    },
    "datatype": {
      "description": "`unsupported_for_venue` only: the datatype the request asked for, as `GET /v1/capabilities` names it.",
      "type": "string",
      "example": "order_flow"
    },
    "error": {
      "description": "Human-readable message. Wording can change; do not parse it.",
      "type": "string"
    },
    "error_code": {
      "description": "Stable, machine-readable error code. Branch on this value, not on the `error` text.\n\n**Contract codes**\n\n| Code | HTTP | Meaning |\n|---|---|---|\n| `invalid_parameter` | 400 | A parameter failed to parse or validate. `param` names it and `valid_values` lists accepted values where the set is fixed. |\n| `invalid_symbol` | 400 | The symbol is not listed on this venue. |\n| `invalid_interval` | 400 | The `interval` (bucket width) is not one this route accepts. |\n| `invalid_cursor` | 400 | The `cursor` is malformed, stale, or was issued for other filters. Restart pagination without a cursor. Trades, liquidations, L2 and L4 diffs, order history and TP/SL routes currently return the first page for a malformed cursor instead. |\n| `invalid_time_range` | 400 | `start` is after `end`, or a time value could not be parsed. |\n| `range_before_coverage` | 400 | The whole requested range ends before the first instant this dataset is served from. |\n| `historical_range_exceeded` | 403 | The requested span is longer than the plan allows in one request or replay. |\n| `historical_depth_exceeded` | 403 | The request reaches further back than the plan's history window. |\n| `unsupported_for_venue` | 404 | The venue does not offer this datatype. The message, `datatype` and `available_on` name where it is served. |\n| `route_not_found` | 404 | No route matches the path or method. `GET /v1/capabilities` lists the routes each venue serves. |\n| `not_found` | 404 | The route exists but the requested resource (for example an incident, endpoint or outcome id) does not. |\n| `unauthorized` | 401 | The API key is missing or invalid. |\n| `forbidden` | 403 | The key is valid but not allowed to make this request. |\n| `insufficient_credits` | 429 | The monthly credit allowance is spent (402 on pay-per-request routes). |\n| `rate_limited` | 429 | Too many requests or concurrent queries. Retry after the interval in the rate-limit headers. |\n| `conflict` | 409 | The request conflicts with the current state of the resource. |\n| `upstream_unavailable` | 503 | A dependency is unavailable or saturated. Retry shortly; the response carries `Retry-After`. |\n| `internal_error` | 500 | An unexpected server error. Quote `request_id` when contacting support. |\n\n**WebSocket only** (sent in `{\"type\":\"error\"}` messages, never by REST)\n\n| Code | Where | Meaning |\n|---|---|---|\n| `endpoint_unsupported` | WebSocket | This WebSocket endpoint does not serve the channel or operation. The message names the endpoint that does. |\n| `slow_consumer` | WebSocket | The connection fell behind a stream and messages were dropped. Re-subscribe, or restart the replay, to resynchronise. |\n\n**Route-specific codes**\n\n| Code | HTTP | Meaning |\n|---|---|---|\n| `positions_unavailable` | 503 | Account positions are temporarily unavailable for this venue. |\n| `reconstruction_unavailable` | 503 | The as-of positions state for this instant cannot be reconstructed right now. |\n| `snapshot_advanced` | 409 | A positions market cursor pinned a snapshot that has since been replaced or expired. Restart pagination. |\n| `pagination_unavailable` | 503 | The next positions page cannot be served right now. Retry the same cursor shortly. |\n| `api_key_limit_reached` | 403 | The account already holds the maximum number of API keys for its plan. |\n| `wallet_requires_plan` | 402 | A wallet-authenticated key needs an active plan for this request. |\n| `wallet_account_required` | 403 | Wallet sign-in needs an existing account linked to the wallet. |\n| `wallet_free_signup_retired` | 410 | Free wallet sign-up is no longer offered. |\n| `account_disabled` | 403 | The account is disabled. |\n| `oauth_not_permitted` | 403 | This route is not available to OAuth access tokens. |\n| `insufficient_scope` | 403 | The OAuth access token lacks the scope this route requires. |\n\n**Legacy names.** Requests without `0xArchive-Version: 2026-10-01` keep the four names that predate the contract; with the header they receive the contract names instead.\n\n| Code | HTTP | Meaning |\n|---|---|---|\n| `invalid_query_params` | 400 | Legacy name of `invalid_parameter` (query parameter), or of `invalid_cursor` when the parameter is `cursor`, sent without the version header. |\n| `invalid_path_params` | 400 | Legacy name of `invalid_parameter` (path parameter), sent without the version header. |\n| `history_window_exceeded` | 403 | Legacy name of `historical_depth_exceeded`, sent without the version header. |\n| `request_range_exceeded` | 403 | Legacy name of `historical_range_exceeded`, sent without the version header. |\n\nTreat any value not listed here as a generic error of the HTTP status.",
      "type": "string",
      "enum": [
        "invalid_parameter",
        "invalid_symbol",
        "invalid_interval",
        "invalid_cursor",
        "invalid_time_range",
        "range_before_coverage",
        "historical_range_exceeded",
        "historical_depth_exceeded",
        "unsupported_for_venue",
        "route_not_found",
        "not_found",
        "unauthorized",
        "forbidden",
        "insufficient_credits",
        "rate_limited",
        "conflict",
        "upstream_unavailable",
        "internal_error",
        "endpoint_unsupported",
        "slow_consumer",
        "positions_unavailable",
        "reconstruction_unavailable",
        "snapshot_advanced",
        "pagination_unavailable",
        "api_key_limit_reached",
        "wallet_requires_plan",
        "wallet_account_required",
        "wallet_free_signup_retired",
        "account_disabled",
        "oauth_not_permitted",
        "insufficient_scope",
        "invalid_query_params",
        "invalid_path_params",
        "history_window_exceeded",
        "request_range_exceeded"
      ],
      "example": "invalid_parameter"
    },
    "max_concurrent": {
      "description": "`rate_limited` concurrency refusals only: simultaneous queries the plan allows.",
      "type": "integer"
    },
    "param": {
      "description": "The parameter that failed validation, when one did.",
      "type": "string",
      "example": "side"
    },
    "request_id": {
      "description": "Unique request ID for support.",
      "type": "string",
      "format": "uuid"
    },
    "success": {
      "description": "Always `false` on an error.",
      "type": "boolean",
      "enum": [
        false
      ]
    },
    "suggestion": {
      "description": "Present when the symbol exists on another venue: where to request it instead.",
      "type": "object",
      "properties": {
        "endpoint": {
          "type": "string",
          "example": "/v1/hyperliquid/hip3/trades/xyz:TSLA"
        },
        "symbol": {
          "type": "string",
          "example": "xyz:TSLA"
        },
        "venue": {
          "type": "string",
          "example": "hip3"
        }
      }
    },
    "valid_values": {
      "description": "Accepted values of `param`, when the set is fixed.",
      "type": "array",
      "items": {
        "type": "string"
      },
      "example": [
        "buy",
        "sell"
      ]
    },
    "venue": {
      "description": "`unsupported_for_venue` only: the venue the request asked.",
      "type": "string",
      "example": "spot"
    }
  }
}

OpenAPI example: `insufficient_credits`

{
  "success": false,
  "code": 429,
  "error_code": "insufficient_credits",
  "error": "Monthly credit limit exceeded. Please upgrade your plan.",
  "request_id": "3f2a9c71-5b0e-4d68-9a4c-7e1d2b6f8a05",
  "credits_used": 50000,
  "credits_limit": 50000
}

OpenAPI example: `rate_limited`

{
  "success": false,
  "code": 429,
  "error_code": "rate_limited",
  "error": "Rate limit exceeded",
  "request_id": "3f2a9c71-5b0e-4d68-9a4c-7e1d2b6f8a05"
}

Status 503

The estimate could not be produced right now. Retry shortly.

application/json

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "estimateWebhookSubscription response 503",
  "description": "Body of every non-2xx JSON response. `code` repeats the HTTP status, `error_code` is the stable machine-readable code (see `ErrorCode`), `error` is a human-readable message, and `request_id` identifies the request for support. Validation failures add `param` and, where the accepted set is fixed, `valid_values`. A 404 for a datatype the venue does not offer (`unsupported_for_venue`) adds `venue`, `datatype` and `available_on`; any other unknown path answers 404 `route_not_found`.",
  "type": "object",
  "required": [
    "code",
    "error",
    "error_code",
    "request_id",
    "success"
  ],
  "properties": {
    "available_on": {
      "description": "`unsupported_for_venue` only: the venues and routes that serve the datatype.",
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "route",
          "venue"
        ],
        "properties": {
          "route": {
            "type": "string",
            "example": "/v1/hyperliquid/orders/{symbol}/flow"
          },
          "venue": {
            "type": "string",
            "example": "hyperliquid"
          }
        }
      }
    },
    "code": {
      "description": "HTTP status code.",
      "type": "integer",
      "example": 400
    },
    "credits_limit": {
      "description": "`insufficient_credits` only: the period's credit allowance.",
      "type": "integer",
      "format": "int64"
    },
    "credits_used": {
      "description": "`insufficient_credits` only: credits used this period.",
      "type": "integer",
      "format": "int64"
    },
    "datatype": {
      "description": "`unsupported_for_venue` only: the datatype the request asked for, as `GET /v1/capabilities` names it.",
      "type": "string",
      "example": "order_flow"
    },
    "error": {
      "description": "Human-readable message. Wording can change; do not parse it.",
      "type": "string"
    },
    "error_code": {
      "description": "Stable, machine-readable error code. Branch on this value, not on the `error` text.\n\n**Contract codes**\n\n| Code | HTTP | Meaning |\n|---|---|---|\n| `invalid_parameter` | 400 | A parameter failed to parse or validate. `param` names it and `valid_values` lists accepted values where the set is fixed. |\n| `invalid_symbol` | 400 | The symbol is not listed on this venue. |\n| `invalid_interval` | 400 | The `interval` (bucket width) is not one this route accepts. |\n| `invalid_cursor` | 400 | The `cursor` is malformed, stale, or was issued for other filters. Restart pagination without a cursor. Trades, liquidations, L2 and L4 diffs, order history and TP/SL routes currently return the first page for a malformed cursor instead. |\n| `invalid_time_range` | 400 | `start` is after `end`, or a time value could not be parsed. |\n| `range_before_coverage` | 400 | The whole requested range ends before the first instant this dataset is served from. |\n| `historical_range_exceeded` | 403 | The requested span is longer than the plan allows in one request or replay. |\n| `historical_depth_exceeded` | 403 | The request reaches further back than the plan's history window. |\n| `unsupported_for_venue` | 404 | The venue does not offer this datatype. The message, `datatype` and `available_on` name where it is served. |\n| `route_not_found` | 404 | No route matches the path or method. `GET /v1/capabilities` lists the routes each venue serves. |\n| `not_found` | 404 | The route exists but the requested resource (for example an incident, endpoint or outcome id) does not. |\n| `unauthorized` | 401 | The API key is missing or invalid. |\n| `forbidden` | 403 | The key is valid but not allowed to make this request. |\n| `insufficient_credits` | 429 | The monthly credit allowance is spent (402 on pay-per-request routes). |\n| `rate_limited` | 429 | Too many requests or concurrent queries. Retry after the interval in the rate-limit headers. |\n| `conflict` | 409 | The request conflicts with the current state of the resource. |\n| `upstream_unavailable` | 503 | A dependency is unavailable or saturated. Retry shortly; the response carries `Retry-After`. |\n| `internal_error` | 500 | An unexpected server error. Quote `request_id` when contacting support. |\n\n**WebSocket only** (sent in `{\"type\":\"error\"}` messages, never by REST)\n\n| Code | Where | Meaning |\n|---|---|---|\n| `endpoint_unsupported` | WebSocket | This WebSocket endpoint does not serve the channel or operation. The message names the endpoint that does. |\n| `slow_consumer` | WebSocket | The connection fell behind a stream and messages were dropped. Re-subscribe, or restart the replay, to resynchronise. |\n\n**Route-specific codes**\n\n| Code | HTTP | Meaning |\n|---|---|---|\n| `positions_unavailable` | 503 | Account positions are temporarily unavailable for this venue. |\n| `reconstruction_unavailable` | 503 | The as-of positions state for this instant cannot be reconstructed right now. |\n| `snapshot_advanced` | 409 | A positions market cursor pinned a snapshot that has since been replaced or expired. Restart pagination. |\n| `pagination_unavailable` | 503 | The next positions page cannot be served right now. Retry the same cursor shortly. |\n| `api_key_limit_reached` | 403 | The account already holds the maximum number of API keys for its plan. |\n| `wallet_requires_plan` | 402 | A wallet-authenticated key needs an active plan for this request. |\n| `wallet_account_required` | 403 | Wallet sign-in needs an existing account linked to the wallet. |\n| `wallet_free_signup_retired` | 410 | Free wallet sign-up is no longer offered. |\n| `account_disabled` | 403 | The account is disabled. |\n| `oauth_not_permitted` | 403 | This route is not available to OAuth access tokens. |\n| `insufficient_scope` | 403 | The OAuth access token lacks the scope this route requires. |\n\n**Legacy names.** Requests without `0xArchive-Version: 2026-10-01` keep the four names that predate the contract; with the header they receive the contract names instead.\n\n| Code | HTTP | Meaning |\n|---|---|---|\n| `invalid_query_params` | 400 | Legacy name of `invalid_parameter` (query parameter), or of `invalid_cursor` when the parameter is `cursor`, sent without the version header. |\n| `invalid_path_params` | 400 | Legacy name of `invalid_parameter` (path parameter), sent without the version header. |\n| `history_window_exceeded` | 403 | Legacy name of `historical_depth_exceeded`, sent without the version header. |\n| `request_range_exceeded` | 403 | Legacy name of `historical_range_exceeded`, sent without the version header. |\n\nTreat any value not listed here as a generic error of the HTTP status.",
      "type": "string",
      "enum": [
        "invalid_parameter",
        "invalid_symbol",
        "invalid_interval",
        "invalid_cursor",
        "invalid_time_range",
        "range_before_coverage",
        "historical_range_exceeded",
        "historical_depth_exceeded",
        "unsupported_for_venue",
        "route_not_found",
        "not_found",
        "unauthorized",
        "forbidden",
        "insufficient_credits",
        "rate_limited",
        "conflict",
        "upstream_unavailable",
        "internal_error",
        "endpoint_unsupported",
        "slow_consumer",
        "positions_unavailable",
        "reconstruction_unavailable",
        "snapshot_advanced",
        "pagination_unavailable",
        "api_key_limit_reached",
        "wallet_requires_plan",
        "wallet_account_required",
        "wallet_free_signup_retired",
        "account_disabled",
        "oauth_not_permitted",
        "insufficient_scope",
        "invalid_query_params",
        "invalid_path_params",
        "history_window_exceeded",
        "request_range_exceeded"
      ],
      "example": "invalid_parameter"
    },
    "max_concurrent": {
      "description": "`rate_limited` concurrency refusals only: simultaneous queries the plan allows.",
      "type": "integer"
    },
    "param": {
      "description": "The parameter that failed validation, when one did.",
      "type": "string",
      "example": "side"
    },
    "request_id": {
      "description": "Unique request ID for support.",
      "type": "string",
      "format": "uuid"
    },
    "success": {
      "description": "Always `false` on an error.",
      "type": "boolean",
      "enum": [
        false
      ]
    },
    "suggestion": {
      "description": "Present when the symbol exists on another venue: where to request it instead.",
      "type": "object",
      "properties": {
        "endpoint": {
          "type": "string",
          "example": "/v1/hyperliquid/hip3/trades/xyz:TSLA"
        },
        "symbol": {
          "type": "string",
          "example": "xyz:TSLA"
        },
        "venue": {
          "type": "string",
          "example": "hip3"
        }
      }
    },
    "valid_values": {
      "description": "Accepted values of `param`, when the set is fixed.",
      "type": "array",
      "items": {
        "type": "string"
      },
      "example": [
        "buy",
        "sell"
      ]
    },
    "venue": {
      "description": "`unsupported_for_venue` only: the venue the request asked.",
      "type": "string",
      "example": "spot"
    }
  }
}

OpenAPI example

{
  "success": false,
  "code": 503,
  "error_code": "upstream_unavailable",
  "error": "estimate is temporarily unavailable",
  "request_id": "3f2a9c71-5b0e-4d68-9a4c-7e1d2b6f8a05"
}

Status default

Any other error. The body is an ErrorResponse; branch on error_code. A 503 (upstream_unavailable) carries Retry-After.

application/json

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "estimateWebhookSubscription response default",
  "description": "Body of every non-2xx JSON response. `code` repeats the HTTP status, `error_code` is the stable machine-readable code (see `ErrorCode`), `error` is a human-readable message, and `request_id` identifies the request for support. Validation failures add `param` and, where the accepted set is fixed, `valid_values`. A 404 for a datatype the venue does not offer (`unsupported_for_venue`) adds `venue`, `datatype` and `available_on`; any other unknown path answers 404 `route_not_found`.",
  "type": "object",
  "required": [
    "code",
    "error",
    "error_code",
    "request_id",
    "success"
  ],
  "properties": {
    "available_on": {
      "description": "`unsupported_for_venue` only: the venues and routes that serve the datatype.",
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "route",
          "venue"
        ],
        "properties": {
          "route": {
            "type": "string",
            "example": "/v1/hyperliquid/orders/{symbol}/flow"
          },
          "venue": {
            "type": "string",
            "example": "hyperliquid"
          }
        }
      }
    },
    "code": {
      "description": "HTTP status code.",
      "type": "integer",
      "example": 400
    },
    "credits_limit": {
      "description": "`insufficient_credits` only: the period's credit allowance.",
      "type": "integer",
      "format": "int64"
    },
    "credits_used": {
      "description": "`insufficient_credits` only: credits used this period.",
      "type": "integer",
      "format": "int64"
    },
    "datatype": {
      "description": "`unsupported_for_venue` only: the datatype the request asked for, as `GET /v1/capabilities` names it.",
      "type": "string",
      "example": "order_flow"
    },
    "error": {
      "description": "Human-readable message. Wording can change; do not parse it.",
      "type": "string"
    },
    "error_code": {
      "description": "Stable, machine-readable error code. Branch on this value, not on the `error` text.\n\n**Contract codes**\n\n| Code | HTTP | Meaning |\n|---|---|---|\n| `invalid_parameter` | 400 | A parameter failed to parse or validate. `param` names it and `valid_values` lists accepted values where the set is fixed. |\n| `invalid_symbol` | 400 | The symbol is not listed on this venue. |\n| `invalid_interval` | 400 | The `interval` (bucket width) is not one this route accepts. |\n| `invalid_cursor` | 400 | The `cursor` is malformed, stale, or was issued for other filters. Restart pagination without a cursor. Trades, liquidations, L2 and L4 diffs, order history and TP/SL routes currently return the first page for a malformed cursor instead. |\n| `invalid_time_range` | 400 | `start` is after `end`, or a time value could not be parsed. |\n| `range_before_coverage` | 400 | The whole requested range ends before the first instant this dataset is served from. |\n| `historical_range_exceeded` | 403 | The requested span is longer than the plan allows in one request or replay. |\n| `historical_depth_exceeded` | 403 | The request reaches further back than the plan's history window. |\n| `unsupported_for_venue` | 404 | The venue does not offer this datatype. The message, `datatype` and `available_on` name where it is served. |\n| `route_not_found` | 404 | No route matches the path or method. `GET /v1/capabilities` lists the routes each venue serves. |\n| `not_found` | 404 | The route exists but the requested resource (for example an incident, endpoint or outcome id) does not. |\n| `unauthorized` | 401 | The API key is missing or invalid. |\n| `forbidden` | 403 | The key is valid but not allowed to make this request. |\n| `insufficient_credits` | 429 | The monthly credit allowance is spent (402 on pay-per-request routes). |\n| `rate_limited` | 429 | Too many requests or concurrent queries. Retry after the interval in the rate-limit headers. |\n| `conflict` | 409 | The request conflicts with the current state of the resource. |\n| `upstream_unavailable` | 503 | A dependency is unavailable or saturated. Retry shortly; the response carries `Retry-After`. |\n| `internal_error` | 500 | An unexpected server error. Quote `request_id` when contacting support. |\n\n**WebSocket only** (sent in `{\"type\":\"error\"}` messages, never by REST)\n\n| Code | Where | Meaning |\n|---|---|---|\n| `endpoint_unsupported` | WebSocket | This WebSocket endpoint does not serve the channel or operation. The message names the endpoint that does. |\n| `slow_consumer` | WebSocket | The connection fell behind a stream and messages were dropped. Re-subscribe, or restart the replay, to resynchronise. |\n\n**Route-specific codes**\n\n| Code | HTTP | Meaning |\n|---|---|---|\n| `positions_unavailable` | 503 | Account positions are temporarily unavailable for this venue. |\n| `reconstruction_unavailable` | 503 | The as-of positions state for this instant cannot be reconstructed right now. |\n| `snapshot_advanced` | 409 | A positions market cursor pinned a snapshot that has since been replaced or expired. Restart pagination. |\n| `pagination_unavailable` | 503 | The next positions page cannot be served right now. Retry the same cursor shortly. |\n| `api_key_limit_reached` | 403 | The account already holds the maximum number of API keys for its plan. |\n| `wallet_requires_plan` | 402 | A wallet-authenticated key needs an active plan for this request. |\n| `wallet_account_required` | 403 | Wallet sign-in needs an existing account linked to the wallet. |\n| `wallet_free_signup_retired` | 410 | Free wallet sign-up is no longer offered. |\n| `account_disabled` | 403 | The account is disabled. |\n| `oauth_not_permitted` | 403 | This route is not available to OAuth access tokens. |\n| `insufficient_scope` | 403 | The OAuth access token lacks the scope this route requires. |\n\n**Legacy names.** Requests without `0xArchive-Version: 2026-10-01` keep the four names that predate the contract; with the header they receive the contract names instead.\n\n| Code | HTTP | Meaning |\n|---|---|---|\n| `invalid_query_params` | 400 | Legacy name of `invalid_parameter` (query parameter), or of `invalid_cursor` when the parameter is `cursor`, sent without the version header. |\n| `invalid_path_params` | 400 | Legacy name of `invalid_parameter` (path parameter), sent without the version header. |\n| `history_window_exceeded` | 403 | Legacy name of `historical_depth_exceeded`, sent without the version header. |\n| `request_range_exceeded` | 403 | Legacy name of `historical_range_exceeded`, sent without the version header. |\n\nTreat any value not listed here as a generic error of the HTTP status.",
      "type": "string",
      "enum": [
        "invalid_parameter",
        "invalid_symbol",
        "invalid_interval",
        "invalid_cursor",
        "invalid_time_range",
        "range_before_coverage",
        "historical_range_exceeded",
        "historical_depth_exceeded",
        "unsupported_for_venue",
        "route_not_found",
        "not_found",
        "unauthorized",
        "forbidden",
        "insufficient_credits",
        "rate_limited",
        "conflict",
        "upstream_unavailable",
        "internal_error",
        "endpoint_unsupported",
        "slow_consumer",
        "positions_unavailable",
        "reconstruction_unavailable",
        "snapshot_advanced",
        "pagination_unavailable",
        "api_key_limit_reached",
        "wallet_requires_plan",
        "wallet_account_required",
        "wallet_free_signup_retired",
        "account_disabled",
        "oauth_not_permitted",
        "insufficient_scope",
        "invalid_query_params",
        "invalid_path_params",
        "history_window_exceeded",
        "request_range_exceeded"
      ],
      "example": "invalid_parameter"
    },
    "max_concurrent": {
      "description": "`rate_limited` concurrency refusals only: simultaneous queries the plan allows.",
      "type": "integer"
    },
    "param": {
      "description": "The parameter that failed validation, when one did.",
      "type": "string",
      "example": "side"
    },
    "request_id": {
      "description": "Unique request ID for support.",
      "type": "string",
      "format": "uuid"
    },
    "success": {
      "description": "Always `false` on an error.",
      "type": "boolean",
      "enum": [
        false
      ]
    },
    "suggestion": {
      "description": "Present when the symbol exists on another venue: where to request it instead.",
      "type": "object",
      "properties": {
        "endpoint": {
          "type": "string",
          "example": "/v1/hyperliquid/hip3/trades/xyz:TSLA"
        },
        "symbol": {
          "type": "string",
          "example": "xyz:TSLA"
        },
        "venue": {
          "type": "string",
          "example": "hip3"
        }
      }
    },
    "valid_values": {
      "description": "Accepted values of `param`, when the set is fixed.",
      "type": "array",
      "items": {
        "type": "string"
      },
      "example": [
        "buy",
        "sell"
      ]
    },
    "venue": {
      "description": "`unsupported_for_venue` only: the venue the request asked.",
      "type": "string",
      "example": "spot"
    }
  }
}

OpenAPI example: `internal_error`

{
  "success": false,
  "code": 500,
  "error_code": "internal_error",
  "error": "Internal server error",
  "request_id": "3f2a9c71-5b0e-4d68-9a4c-7e1d2b6f8a05"
}

OpenAPI example: `upstream_unavailable`

{
  "success": false,
  "code": 503,
  "error_code": "upstream_unavailable",
  "error": "The service is temporarily unavailable. Retry shortly.",
  "request_id": "3f2a9c71-5b0e-4d68-9a4c-7e1d2b6f8a05"
}

Guides

API reference

Estimate a webhook subscription JSON Schema

Route Metadata

Human endpoint reference

Request Parameters

Header Parameters

Request Body

application/json

Response Contracts

Status 200

application/json

Status 400

application/json

OpenAPI example: `current_main`

OpenAPI example: `invalid_parameter`

OpenAPI example: `invalid_symbol`

OpenAPI example: `invalid_time_range`

OpenAPI example: `legacy_invalid_query_params`

Status 401

application/json

OpenAPI example

Status 429

application/json

OpenAPI example: `insufficient_credits`

OpenAPI example: `rate_limited`

Status 503

application/json

OpenAPI example

Status default

application/json

OpenAPI example: `internal_error`

OpenAPI example: `upstream_unavailable`

​Route Metadata

​Human endpoint reference

​Request Parameters

​Header Parameters

​Request Body

​application/json

​Response Contracts

​Status 200

​application/json

​Status 400

​application/json

OpenAPI example: current_main

OpenAPI example: invalid_parameter

OpenAPI example: invalid_symbol

OpenAPI example: invalid_time_range

OpenAPI example: legacy_invalid_query_params

​Status 401

​application/json

OpenAPI example

​Status 429

​application/json

OpenAPI example: insufficient_credits

OpenAPI example: rate_limited

​Status 503

​application/json

OpenAPI example

​Status default

​application/json

OpenAPI example: internal_error

OpenAPI example: upstream_unavailable

Route Metadata

Human endpoint reference

Request Parameters

Header Parameters

Request Body

application/json

Response Contracts

Status 200

application/json

Status 400

application/json

OpenAPI example: `current_main`

OpenAPI example: `invalid_parameter`

OpenAPI example: `invalid_symbol`

OpenAPI example: `invalid_time_range`

OpenAPI example: `legacy_invalid_query_params`

Status 401

application/json

Status 429

application/json

OpenAPI example: `insufficient_credits`

OpenAPI example: `rate_limited`

Status 503

application/json

Status default

application/json

OpenAPI example: `internal_error`

OpenAPI example: `upstream_unavailable`