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

# Cancel order

> Cancel a specific order



## OpenAPI

````yaml api-reference/oapi-schemas/orders-schema.json post /v1/order/{orderId}/cancel
openapi: 3.0.1
info:
  title: Orders API
  description: Order management endpoints for trading
  version: v1.0.0
servers:
  - url: https://api.polymarket.us
security: []
tags:
  - name: Orders
paths:
  /v1/order/{orderId}/cancel:
    post:
      tags:
        - Orders
      summary: Cancel order
      description: Cancel a specific order
      operationId: OrdersService_CancelOrder
      parameters:
        - name: orderId
          in: path
          description: Exchange-assigned Order ID to cancel
          required: true
          schema:
            type: string
      requestBody:
        description: Request to cancel the order
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CancelOrderRequest'
      responses:
        '200':
          description: Order canceled successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CancelOrderResponse'
        '400':
          description: Bad request - invalid cancel request
        '401':
          description: Unauthorized - invalid or missing API key
        '500':
          description: Internal server error
components:
  schemas:
    CancelOrderRequest:
      type: object
      properties:
        market_slug:
          type: string
          description: Market slug of the order to cancel
    CancelOrderResponse:
      type: object
      description: Empty response on successful cancellation

````