PolymarketDocumentation/docs/api-reference/trade/cancel-orders-for-a-market.md

Documentation Index

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Cancel orders for a market

Cancels all open orders for the authenticated user in a specific market (condition) and asset. Works even in cancel-only mode.

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:
  /cancel-market-orders:
    delete:
      tags:
        - Trade
      summary: Cancel orders for a market
      description: >
        Cancels all open orders for the authenticated user in a specific market
        (condition) and asset.

        Works even in cancel-only mode.
      operationId: cancelMarketOrders
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/OrderMarketCancelParams'
            example:
              market: >-
                0x0000000000000000000000000000000000000000000000000000000000000001
              asset_id: 0xabc123def456...
      responses:
        '200':
          description: Cancellation results for market orders
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CancelOrdersResponse'
              examples:
                canceled:
                  summary: All market orders canceled
                  value:
                    canceled:
                      - '0xabcdef1234567890abcdef1234567890abcdef12'
                      - '0xfedcba0987654321fedcba0987654321fedcba09'
                    not_canceled: {}
                mixed:
                  summary: Some orders canceled, some not
                  value:
                    canceled:
                      - '0xabcdef1234567890abcdef1234567890abcdef12'
                    not_canceled:
                      '0xfedcba0987654321fedcba0987654321fedcba09': Order already matched
                no_orders:
                  summary: No orders found for this market
                  value:
                    canceled: []
                    not_canceled: {}
        '400':
          description: Bad request - Invalid payload
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              example:
                error: Invalid order payload
        '401':
          description: Unauthorized - Invalid API key or authentication failed
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              example:
                error: Invalid API key
        '500':
          description: Internal server error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              example:
                error: Internal server error
        '503':
          description: >-
            Service unavailable - Trading disabled (cancels still work in
            cancel-only mode)
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              example:
                error: >-
                  Trading is currently disabled. Check polymarket.com for
                  updates
      security:
        - polyApiKey: []
          polyAddress: []
          polySignature: []
          polyPassphrase: []
          polyTimestamp: []
components:
  schemas:
    OrderMarketCancelParams:
      type: object
      required:
        - market
        - asset_id
      properties:
        market:
          type: string
          description: Market (condition ID)
          example: '0x0000000000000000000000000000000000000000000000000000000000000001'
        asset_id:
          type: string
          description: Asset ID (token ID)
          example: 0xabc123def456...
    CancelOrdersResponse:
      type: object
      required:
        - canceled
        - not_canceled
      properties:
        canceled:
          type: array
          description: Array of order IDs that were successfully canceled
          items:
            type: string
          example:
            - '0xabcdef1234567890abcdef1234567890abcdef12'
        not_canceled:
          type: object
          description: Map of order IDs that could not be canceled with error messages
          additionalProperties:
            type: string
          example:
            '0xabcdef1234567890abcdef1234567890abcdef12': Order not found or already canceled
    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
  securitySchemes:
    polyApiKey:
      type: apiKey
      in: header
      name: POLY_API_KEY
      description: Your API key
    polyAddress:
      type: apiKey
      in: header
      name: POLY_ADDRESS
      description: Ethereum address associated with the API key
    polySignature:
      type: apiKey
      in: header
      name: POLY_SIGNATURE
      description: HMAC signature of the request
    polyPassphrase:
      type: apiKey
      in: header
      name: POLY_PASSPHRASE
      description: API key passphrase
    polyTimestamp:
      type: apiKey
      in: header
      name: POLY_TIMESTAMP
      description: Unix timestamp of the request