---
title: "Send a message to an existing Microsoft Teams chat as the calling member"
method: POST
path: "/v1/capabilities/microsoft-365/teams-chats/{chatId}/messages"
tags: ["Capability Sources"]
---

# Send a message to an existing Microsoft Teams chat as the calling member

`POST /v1/capabilities/microsoft-365/teams-chats/{chatId}/messages`

Sends one message to an existing Teams chat. The operation cannot create a new chat.

## Path parameters

- `chatId` string, required

## Request body

- Microsoft365TeamsMessageBody
  - `content` string, required

## Response `200`

Teams chat message sent.

- Microsoft365TeamsMessageResponse
  - `ok` true, required
  - `message` Microsoft365TeamsMessage, required
    - `id` string, required
    - `createdDateTime` string, required
    - `content` string, required
    - `from` Microsoft365EmailAddress, required
      - `name` string, required
      - `address` string, required
    - `webUrl` string, required

## Other responses

- `401` — The caller must be signed in.
- `409` — The calling member has not connected their Microsoft account or is missing permission.
- `502` — Microsoft Graph rejected the request.

---

[API](https://skmtc.net/openworklabs/apis/den-api.md) · [All operations](https://skmtc.net/openworklabs/apis/den-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/openworklabs/den-api/versions/073bc652adfb/schema)