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

# Cancel Order

> Cancel Order.

Requests cancellation of one order.

**Base URL:** `https://api.dexbuilder.com`

**Authentication:** Use a Broker API Key and sign this request with `Timestamp` and `SIGN`. Pass a wallet address that belongs to your Broker in `X-User-Wallet-Address`. Calculate the signature using the external Broker path. See [Broker API Key and signing](https://dexbuilder.mintlify.site/en/api-reference/common/broker-authentication.md) and [Access on behalf of a user](https://dexbuilder.mintlify.site/en/api-reference/common/sub-user-wallet.md).

## Request

```bash theme={null}
curl -X DELETE "https://api.dexbuilder.com/api/v4/broker/prediction/orders/{order_id}" \
  -H "KEY: ${BROKER_API_KEY}" \
  -H "SIGN: ${SIGN}" \
  -H "Timestamp: ${TIMESTAMP}" \
  -H "X-User-Wallet-Address: ${USER_WALLET}"
```

`order_id` identifies the order.

The OpenAPI panel below is the source of truth for required parameters, types, enum values, and request-body fields. Timestamps are Unix timestamps unless the field description states otherwise.

## Response

Returns the order ID, cancellation status, and current processing status. An order may have executed before cancellation completes.

A successful response uses HTTP 200. Invalid parameters or request bodies return HTTP 400. Private endpoints can return HTTP 401 when authentication fails, and temporary upstream failures can return HTTP 503. The error response contains a machine-readable label and message.

For order, position, claim, transfer, and account operations, treat the response as the current server result and query the resource again when the operation is asynchronous.


## OpenAPI

````yaml openapi/event-markets-en.yaml DELETE /api/v4/broker/prediction/orders/{order_id}
openapi: 3.0.3
info:
  title: DexBuilder Prediction Markets API
  version: 1.0.0
  description: DexBuilder Prediction Markets REST API.
servers:
  - url: https://api.dexbuilder.com
security: []
paths:
  /api/v4/broker/prediction/orders/{order_id}:
    delete:
      summary: Cancel Order
      description: Cancel Order.
      operationId: cancel_order
      parameters:
        - name: Timestamp
          in: header
          required: true
          description: >-
            Unix timestamp in seconds; the gateway allows at most 60 seconds of
            clock skew.
          schema:
            type: string
        - name: SIGN
          in: header
          required: true
          description: >-
            Hexadecimal HMAC-SHA512 signature over the external request path,
            query string, and body.
          schema:
            type: string
        - name: X-User-Wallet-Address
          in: header
          required: true
          description: >-
            End-user wallet address. The gateway checks that this wallet belongs
            to the current Broker.
          schema:
            type: string
        - name: order_id
          in: path
          required: true
          schema:
            type: string
      responses:
        '200':
          description: Request succeeded
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CancelOrderAcceptResp'
        '400':
          description: Invalid request or parameters
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '401':
          description: Authentication failed
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '503':
          description: Service temporarily unavailable
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
      security:
        - BrokerAPIKey: []
components:
  schemas:
    CancelOrderAcceptResp:
      type: object
      properties:
        cancel_status:
          type: string
          enum:
            - accepted
        order_id:
          type: string
        status:
          type: string
      description: Response object.
    Error:
      type: object
      description: Error response.
      properties:
        label:
          type: string
          example: INVALID_ARGUMENT
        message:
          type: string
          example: invalid request
  securitySchemes:
    BrokerAPIKey:
      type: apiKey
      in: header
      name: KEY
      description: Broker API Key, created through the project administrator's process.

````

This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.