---
title: "Book History"
method: GET
path: "/api/v2/book/pro/history"
tags: ["book-pro"]
---

# Book History

`GET /api/v2/book/pro/history`

## Request

- Base URL: `https://orcalayer.com` (the document declares no server; this is the origin it was published from)
- URL: `https://orcalayer.com/api/v2/book/pro/history`
- Auth: none declared

Best bid / ask, spread and the dollars resting within 1¢ and 5¢ of the touch on each side, one row per step.

## Query parameters

- `market` string, required: condition id, slug or market id
- `outcome` string, nullable: Yes / No or the outcome name; default the first outcome
- `from` string, nullable: ISO time, YYYY-MM-DD or unix seconds; default 24h before `to`
- `to` string, nullable: default now
- `step` string

## Response `200`

Successful Response

- unknown

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/orcalayer/apis/orcalayer-api.md) · [All operations](https://skmtc.dev/orcalayer/apis/orcalayer-api/llms.txt) · [OpenAPI document](https://skmtc.dev/orcalayer/apis/orcalayer-api/revisions/5d1d509daba6?raw)