> ## Documentation Index
> Fetch the complete documentation index at: https://docs.0xarchive.io/llms.txt
> Use this file to discover all available pages before exploring further.

# OrderbookDelta Schema

> Incremental orderbook change (used with tick-level data). Includes parameters, response shapes, examples, and implementation notes from the 0xArchive contract.

Source OpenAPI: 0xArchive API 1.5.0; 140 paths; 119 component schemas.

Incremental orderbook change (used with tick-level data)

## Required Fields

| Field       | Type          | Description                                      |
| ----------- | ------------- | ------------------------------------------------ |
| `price`     | number        | Price level                                      |
| `sequence`  | integer       | Sequence number for ordering deltas              |
| `side`      | string        | Side of the orderbook (bid or ask)               |
| `size`      | number        | New size at this price level (0 = level removed) |
| `timestamp` | integer:int64 | Timestamp in milliseconds                        |

## JSON Schema

```json theme={"theme":"github-dark"}
{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "OrderbookDelta",
  "description": "Incremental orderbook change (used with tick-level data)",
  "type": "object",
  "required": [
    "price",
    "sequence",
    "side",
    "size",
    "timestamp"
  ],
  "properties": {
    "price": {
      "description": "Price level",
      "type": "number",
      "example": 50000
    },
    "sequence": {
      "description": "Sequence number for ordering deltas",
      "type": "integer",
      "example": 12345
    },
    "side": {
      "description": "Side of the orderbook (bid or ask)",
      "type": "string",
      "enum": [
        "bid",
        "ask"
      ],
      "example": "bid"
    },
    "size": {
      "description": "New size at this price level (0 = level removed)",
      "type": "number",
      "example": 1.5
    },
    "timestamp": {
      "description": "Timestamp in milliseconds",
      "type": "integer",
      "format": "int64",
      "example": 1704067201000
    }
  }
}
```

## Referenced By

Use this shared schema with the generated component index and route-specific endpoint pages during implementation.