---
title: "Send a message to a match chat room"
method: POST
path: "/matches/{matchId}/chat"
tags: ["Match Chat"]
---

# Send a message to a match chat room

`POST /matches/{matchId}/chat`

Sends a message to a match's chat room as the API key owner. The owner must be a participant of the match; a non-participant receives 403. Requires the chat.write scope and the writes feature. Supports the Idempotency-Key header.

## Path parameters

- `matchId` string, required — Match ID. The caller must be a participant of this match.

## Request body

- SendChatMessageRequestBody — Sends a message to the match chat room as the API key owner.
  - `content` string, required — Message body (1-255 chars).

## Response `200`

The message was sent.

- SendChatMessageResponse
  - `success` true, required
  - `messageId` string, required — Created message ID.
  - `timestamp` string, required — Response generation time (ISO 8601).

## Other responses

- `400` — Bad request (invalid body, cursor, limit, or date).
- `401` — Missing or invalid API key.
- `403` — API key lacks the required permission.
- `404` — Resource not found.
- `409` — Conflict.
- `429` — Rate limited.
- `500` — Internal server error.

## Changes

- **2026-06-10** `82f2480cdb83` — 2 info
  - api tag `Match Chat` added
  - api tag `Chat` removed
- **2026-06-08** `33b01a4694a7` — 1 info
  - endpoint added
- **2026-06-04** `f22bd61fd595` — 1 breaking
  - api path removed without deprecation

[Change history](https://skmtc.dev/teambattles/apis/teambattles-api/changes/matches/:matchId/chat/post.md)

---

[API](https://skmtc.dev/teambattles/apis/teambattles-api.md) · [All operations](https://skmtc.dev/teambattles/apis/teambattles-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/teambattles/teambattles-api/revisions/75b07daef7dc/schema)