{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"title": "ApiResponseL2OrderBookDiffArray",
"type": "object",
"properties": {
"data": {
"type": "array",
"items": {
"description": "Full-depth L2 aggregate diff event derived from L4 deltas",
"type": "object",
"required": [
"block_number",
"count",
"price",
"side",
"size",
"timestamp"
],
"properties": {
"block_number": {
"description": "Hyperliquid block number for the diff event",
"type": "integer",
"format": "int64",
"example": 1023882395
},
"count": {
"description": "Number of orders at the price level after the diff",
"type": "integer",
"example": 3
},
"price": {
"description": "Price level changed by this diff",
"type": "number",
"example": 61088
},
"side": {
"description": "Book side: B for bid, A for ask",
"type": "string",
"enum": [
"B",
"A"
],
"example": "B"
},
"size": {
"description": "Aggregate size at the price level after the diff",
"type": "number",
"example": 0.40603
},
"timestamp": {
"description": "Diff timestamp (UTC)",
"type": "string",
"format": "date-time",
"example": "2026-06-05T13:53:33.971Z"
}
}
}
},
"meta": {
"description": "Response metadata",
"type": "object",
"properties": {
"count": {
"description": "Number of records returned",
"type": "integer"
},
"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
},
"request_id": {
"description": "Unique request ID for support",
"type": "string",
"format": "uuid"
}
}
},
"success": {
"type": "boolean",
"example": true
}
}
}