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Documentation Index

Fetch the complete documentation index at: https://docs.polymarket.com/llms.txt Use this file to discover all available pages before exploring further.

Get midpoint prices (query parameters)

Retrieves midpoint prices for multiple token IDs using query parameters. The midpoint is calculated as the average of the best bid and best ask prices.

OpenAPI

openapi: 3.1.0
info:
  title: Polymarket CLOB API
  description: Polymarket CLOB API Reference
  license:
    name: MIT
    identifier: MIT
  version: 1.0.0
servers:
  - url: https://clob.polymarket.com
    description: Production CLOB API
  - url: https://clob-staging.polymarket.com
    description: Staging CLOB API
security: []
tags:
  - name: Trade
    description: Trade endpoints
  - name: Markets
    description: Market data endpoints
  - name: Account
    description: Account and authentication endpoints
  - name: Notifications
    description: User notification endpoints
  - name: Rewards
    description: Rewards and earnings endpoints
  - name: Rebates
    description: Maker rebate endpoints
paths:
  /midpoints:
    get:
      tags:
        - Market Data
      summary: Get midpoint prices (query parameters)
      description: >
        Retrieves midpoint prices for multiple token IDs using query parameters.

        The midpoint is calculated as the average of the best bid and best ask
        prices.
      operationId: getMidpointsGet
      parameters:
        - name: token_ids
          in: query
          description: Comma-separated list of token IDs
          required: true
          schema:
            type: string
          example: 0xabc123...,0xdef456...
      responses:
        '200':
          description: Successfully retrieved midpoint prices
          content:
            application/json:
              schema:
                type: object
                additionalProperties:
                  type: string
                description: Map of token ID to midpoint price
              example:
                0xabc123def456...: '0.45'
                0xdef456abc123...: '0.52'
        '400':
          description: Bad request - Invalid payload
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              example:
                error: Invalid payload
        '500':
          description: Internal server error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              example:
                error: error getting the mid price
      security: []
components:
  schemas:
    ErrorResponse:
      type: object
      required:
        - error
      properties:
        error:
          type: string
          description: Error message
        code:
          type: string
          description: Machine-readable error code, when provided
        retry_after_seconds:
          type: integer
          description: Number of seconds to wait before retrying, when provided