---
title: "Cancel all unmatched orders related to an event"
method: POST
path: "/v4/mm/cancel_orders_by_event"
tags: ["order"]
---

# Cancel all unmatched orders related to an event

`POST /v4/mm/cancel_orders_by_event`

Cancel all unmatched orders related to an event

## Request body

- MarketMakerCancelOrdersByEventRequest
  - `event_id` integer

## Response `200`

OK

- MarketMakerCancelOrdersByEventResponse
  - `data` V4CancelOrdersByEventResponse
    - `success` boolean

## Other responses

- `400` — Bad request
- `401` — Unauthorized
- `404` — Your requested data is not found or order is cancelled
- `500` — Internal server error

---

[API](https://skmtc.net/prophetx/apis/external-market-maker-api.md) · [All operations](https://skmtc.net/prophetx/apis/external-market-maker-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/prophetx/external-market-maker-api/versions/cf6d43de1db2/schema)