---
title: "Changes to Get Arkham Polymarket order book"
method: POST
path: "/polymarket/order-book"
---

# Changes to Get Arkham Polymarket order book

`POST /polymarket/order-book`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 1 of 5 revisions.

- **2026-10-27** `60e4a5fdbecc`: 2 breaking

## Changes

- **2026-10-27** `60e4a5fdbecc`: 2 breaking
  - request property `additionalProperties/anyOf[subschema #4]/items/` list-of-types was narrowed by removing types `boolean and number` from media type `application/json`
  - request property `conditionId/anyOf[subschema #4]/items/` list-of-types was narrowed by removing types `boolean and number` from media type `application/json`

---

[Operation](https://skmtc.dev/arkm/apis/arkham-x402/docs/polymarket/order-book/post.md) - [API](https://skmtc.dev/arkm/apis/arkham-x402.md) - [Page](https://skmtc.dev/arkm/apis/arkham-x402/changes/polymarket/order-book/post)