is_settled filter. Cursor pagination. Response uses Hip4OutcomeAggregate and OMITS the aggregated_oi field. Use /outcomes/{outcome_id} to fetch a single outcome with aggregated_oi populated. Data available from May 2026.
Route Metadata
| Field | Value |
|---|---|
| Method | GET |
| Path | /v1/hyperliquid/hip4/outcomes |
| operationId | listHip4Outcomes |
| Tag | HIP-4 Outcomes - Outcomes |
| Family | HIP-4 |
| Deprecated or legacy | no |
Request Parameters
Query Parameters
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"title": "listHip4Outcomes query parameters",
"type": "object",
"properties": {
"is_settled": {
"description": "Filter by settlement status. Omit to return both live and settled outcomes.",
"type": "boolean",
"x-parameter-location": "query"
},
"cursor": {
"description": "Cursor for pagination (use the value from previous response's `next_cursor`)",
"type": "string",
"x-parameter-location": "query"
},
"limit": {
"description": "Maximum number of results (default: 100, max: 1000)",
"type": "integer",
"default": 100,
"maximum": 1000,
"x-parameter-location": "query"
}
}
}
Response Contracts
Status 200
List of HIP-4 outcomes (withoutaggregated_oi)
application/json
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"title": "listHip4Outcomes response 200",
"description": "API response wrapping an array of HIP-4 outcome aggregates (without `aggregated_oi`; use `/outcomes/{outcome_id}` for the detail variant)",
"type": "object",
"properties": {
"data": {
"type": "array",
"items": {
"description": "Per-outcome aggregate (both sides combined). Returned by `/outcomes` (list, without `aggregated_oi`) and `/outcomes/{outcome_id}` (detail, with `aggregated_oi` populated).",
"type": "object",
"required": [
"is_settled",
"outcome_id",
"side_specs"
],
"properties": {
"aggregated_oi": {
"description": "Display/paired/parity OI aggregates. Populated ONLY on the `/outcomes/{outcome_id}` detail response. Omitted (or null) on the `/outcomes` list response.",
"nullable": true,
"allOf": [
{
"description": "Derived OI display fields combining both sides of a HIP-4 outcome. Currency is always `USDH` (Hyperliquid's stablecoin). Only populated on `/outcomes/{outcome_id}` (detail), NOT on `/outcomes` (list).",
"type": "object",
"required": [
"currency"
],
"properties": {
"as_of": {
"description": "Latest timestamp across both sides",
"type": "string",
"format": "date-time",
"nullable": true,
"example": "2026-05-02T20:27:21Z"
},
"currency": {
"description": "Notional currency. Always `USDH` for HIP-4.",
"type": "string",
"enum": [
"USDH"
],
"example": "USDH"
},
"outcome_display_open_interest_contracts": {
"description": "Display total: sum of side0 + side1 OI contracts. Use this for outcome-level OI dashboards.",
"type": "number",
"nullable": true,
"example": 1136096
},
"paired_set_supply_contracts": {
"description": "Paired-set supply: minimum of side0 and side1 OI contracts. Represents the count of fully collateralized Yes+No pairs in circulation.",
"type": "number",
"nullable": true,
"example": 568048
},
"side0_as_of": {
"description": "Timestamp of the side 0 OI sample",
"type": "string",
"format": "date-time",
"nullable": true,
"example": "2026-05-02T20:27:21Z"
},
"side0_open_interest_contracts": {
"description": "Latest open-interest contracts for side 0 (Yes)",
"type": "number",
"nullable": true,
"example": 568048
},
"side1_as_of": {
"description": "Timestamp of the side 1 OI sample",
"type": "string",
"format": "date-time",
"nullable": true,
"example": "2026-05-02T20:27:21Z"
},
"side1_open_interest_contracts": {
"description": "Latest open-interest contracts for side 1 (No)",
"type": "number",
"nullable": true,
"example": 568048
},
"side_supply_parity": {
"description": "True when side0 OI equals side1 OI within tolerance. Parity should hold for binary outcomes; a sustained false value indicates ingestion drift.",
"type": "boolean",
"nullable": true,
"example": true
}
}
}
]
},
"class": {
"description": "Outcome class (e.g., `priceBinary`)",
"type": "string",
"nullable": true,
"example": "priceBinary"
},
"description_raw": {
"description": "Pipe-delimited recurring-market metadata as emitted upstream",
"type": "string",
"nullable": true,
"example": "class:priceBinary|underlying:BTC|expiry:20260503-0600|targetPrice:78213|period:1d"
},
"expiry": {
"description": "Settlement timestamp (UTC)",
"type": "string",
"format": "date-time",
"nullable": true,
"example": "2026-05-03T06:00:00Z"
},
"is_settled": {
"description": "Whether the outcome has settled",
"type": "boolean",
"example": false
},
"name": {
"description": "Human-readable outcome name (without per-side suffix)",
"type": "string",
"nullable": true,
"example": "BTC ≥ 78213 by 2026-05-03 06:00 UTC"
},
"outcome_id": {
"description": "Numeric outcome identifier",
"type": "integer",
"format": "int64",
"example": 0
},
"period": {
"description": "Cadence of the recurring market (e.g., `1d`, `1h`)",
"type": "string",
"nullable": true,
"example": "1d"
},
"side_specs": {
"description": "Per-side specs. Typically two elements: side 0 (Yes) and side 1 (No).",
"type": "array",
"items": {
"description": "Per-side spec nested in `Hip4OutcomeAggregate.side_specs`. One element per side (typically two: side 0 = Yes, side 1 = No).",
"type": "object",
"required": [
"asset_id",
"coin",
"name",
"side"
],
"properties": {
"asset_id": {
"description": "Public asset ID for this side",
"type": "integer",
"format": "int64",
"example": 100000000
},
"coin": {
"description": "Coin identifier for this side. Returned in `#`-prefixed form. REST paths accept either the bare numeric id (e.g. `0`) or the `#`-prefixed form (e.g. `#0`).",
"type": "string",
"example": "#0"
},
"name": {
"description": "Human label for this side",
"type": "string",
"example": "Yes"
},
"side": {
"description": "Side index: 0 = Yes, 1 = No",
"type": "integer",
"enum": [
0,
1
],
"example": 0
}
}
}
},
"source_seen_at": {
"description": "Last time the outcome was seen upstream",
"type": "string",
"format": "date-time",
"nullable": true,
"example": "2026-05-02T20:25:00Z"
},
"status": {
"description": "Lifecycle status (`live`, `settled`, ...)",
"type": "string",
"nullable": true,
"example": "live"
},
"target_price": {
"description": "Target price for the binary outcome",
"type": "number",
"nullable": true,
"example": 78213
},
"underlying": {
"description": "Underlying asset for recurring price-binary outcomes",
"type": "string",
"nullable": true,
"example": "BTC"
}
}
}
},
"meta": {
"description": "Response metadata",
"type": "object",
"properties": {
"count": {
"description": "Number of records returned",
"type": "integer"
},
"coverage_from": {
"description": "Earliest coverage for the requested symbol and data type. Present only when the requested window ends before coverage begins.",
"type": "string",
"format": "date-time"
},
"next_cursor": {
"description": "Cursor for pagination (timestamp). Use this value as the `cursor` parameter to fetch the next page of results.",
"type": "string",
"nullable": true
},
"notice": {
"description": "Human-readable advisory about the response. Currently used when the requested window ends before coverage begins for the symbol; may carry other advisories in future.",
"type": "string"
},
"request_id": {
"description": "Unique request ID for support",
"type": "string",
"format": "uuid"
}
}
},
"success": {
"type": "boolean",
"example": true
}
}
}
Status 400
Invalid requestapplication/json
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"title": "listHip4Outcomes response 400",
"description": "Error response",
"type": "object",
"properties": {
"code": {
"description": "HTTP status code",
"type": "integer"
},
"error": {
"description": "Error message",
"type": "string"
},
"error_code": {
"description": "Machine-readable error code. Common values: `invalid_query_params` (a query parameter failed to parse or validate) and `invalid_path_params` (a path parameter failed to parse). Other endpoint-specific codes exist; treat unknown codes as generic errors of the given HTTP status.",
"type": "string"
},
"request_id": {
"description": "Unique request ID for support",
"type": "string",
"format": "uuid"
}
}
}
OpenAPI example
{
"code": 400,
"error": "Failed to deserialize query string: limit: invalid digit found in string",
"error_code": "invalid_query_params",
"request_id": "3f2a9c71-5b0e-4d68-9a4c-7e1d2b6f8a05"
}
Status 401
Authentication requiredapplication/json
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"title": "listHip4Outcomes response 401",
"description": "Error response",
"type": "object",
"properties": {
"code": {
"description": "HTTP status code",
"type": "integer"
},
"error": {
"description": "Error message",
"type": "string"
},
"error_code": {
"description": "Machine-readable error code. Common values: `invalid_query_params` (a query parameter failed to parse or validate) and `invalid_path_params` (a path parameter failed to parse). Other endpoint-specific codes exist; treat unknown codes as generic errors of the given HTTP status.",
"type": "string"
},
"request_id": {
"description": "Unique request ID for support",
"type": "string",
"format": "uuid"
}
}
}
OpenAPI example
{
"code": 401,
"error": "Missing or invalid API key. Provide X-API-Key header."
}
Status 429
Rate limit exceededapplication/json
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"title": "listHip4Outcomes response 429",
"description": "Error response",
"type": "object",
"properties": {
"code": {
"description": "HTTP status code",
"type": "integer"
},
"error": {
"description": "Error message",
"type": "string"
},
"error_code": {
"description": "Machine-readable error code. Common values: `invalid_query_params` (a query parameter failed to parse or validate) and `invalid_path_params` (a path parameter failed to parse). Other endpoint-specific codes exist; treat unknown codes as generic errors of the given HTTP status.",
"type": "string"
},
"request_id": {
"description": "Unique request ID for support",
"type": "string",
"format": "uuid"
}
}
}
OpenAPI example
{
"code": 429,
"error": "Rate limit exceeded"
}