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

# Get Prediction Order Book

> Get the live order book (bids and asks) for a specific outcome of a prediction market.

<Warning>**Alpha** — This endpoint is part of the Prediction Markets API, currently in early access. May change without notice.</Warning>


## OpenAPI

````yaml GET /2/pm/market/book
openapi: 3.0.0
info:
  version: 1.0.0
  title: Mobula Prediction Markets API
  description: >-
    Documentation of the Mobula Prediction Markets API.


    The PM API is currently served from a dedicated host:
    `pm-api-prod-eu.mobula.io`.

    All endpoints below require an API key (same key as the main Mobula API).


    Parameter names below are the **canonical names enforced by the API

    controllers** (Zod-validated). Following the wrong name (e.g. `?market=...`

    instead of `?platform=...&marketId=...`) returns `HTTP 400`.
servers:
  - url: https://pm-api-prod-eu.mobula.io/api/
    description: PM Production API (requires API key)
security: []
tags:
  - name: V2 - PM Market
    description: Prediction market data — details, prices, order book, trades, OHLCV
  - name: V2 - PM Discovery
    description: Search, trending, categories, live markets
  - name: V2 - PM Wallet
    description: Wallet prediction-market positions, balances, PnL, activity, status
paths:
  /2/pm/market/book:
    get:
      tags:
        - V2 - PM Market
      summary: Get Prediction Order Book
      description: >
        Get the live CLOB order book (bids and asks) for a specific outcome.


        Required params: `platform` + `outcomeId`. The order book is per-outcome
        (each side

        of the market has its own token id), so `marketId` is not used here.
      parameters:
        - $ref: '#/components/parameters/Platform'
        - $ref: '#/components/parameters/OutcomeId'
      responses:
        '200':
          description: Order book — top-of-book first (bids price desc, asks price asc).
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    type: object
                    properties:
                      bids:
                        type: array
                      asks:
                        type: array
components:
  parameters:
    Platform:
      name: platform
      in: query
      required: true
      description: >-
        Prediction market platform. Today only `polymarket` is supported; any
        other value returns 400.
      schema:
        type: string
        enum:
          - polymarket
        example: polymarket
    OutcomeId:
      name: outcomeId
      in: query
      required: true
      description: >-
        Polymarket outcome / token ID — uint256 decimal string (the ERC-1155
        token id of the YES/NO/etc. side).
      schema:
        type: string
        pattern: ^[0-9]+$
        example: >-
          59855952379545476461266875939089074481171378466995213858930892770855011813551

````