Mattermost MCP Server
Most monitoring and observability work still happens through a UI a human drives. Mattermost MCP server moves it into the conversation instead. Mattermost MCP Server.
MCP Server for the Mattermost API, enabling Claude and other MCP clients to interact with Mattermost workspaces.
The server publishes 10 tools. What each one is for:
mattermost_list_channels — List channels in the workspace (public, private, and DMs)mattermost_get_channel_history — Get messages from a channel with filtering optionsmattermost_post_message — Post a new message to a channelmattermost_reply_to_thread — Reply to a specific message threadmattermost_add_reaction — Add an emoji reaction to a messagemattermost_get_thread_replies — Get all replies in a threadmattermost_get_users — Get a list of users in the workspacemattermost_get_user_profile — Get detailed profile information for a usermattermost_run_monitoring — Trigger topic monitoring immediatelyConfiguration — The Configuration tool exposed by this serverConfiguration is passed through the environment: MATTERMOST_URL, MATTERMOST_TOKEN, MATTERMOST_TEAM_ID, YOUR_TOKEN. Treat anything key-shaped as a real credential — scope it to the minimum the server needs, and rotate it if it ever lands in a shared config.
The server ships on npm as @donach/mattermost-mcp, so your MCP client can launch it on demand — there is no separate build step. Add the server block to your client's configuration, restart it, and the tools register themselves.
This sits in the monitoring and observability group, where several servers overlap in what they claim to do but differ sharply once you actually set them up. Mattermost's toolset — mattermost_list_channels, mattermost_get_channel_history, mattermost_post_message and 7 more — is a fair guide to whether it matches your workflow. It is maintained by donach; worth a glance at recent repository activity before you build anything load-bearing on it.
We check each listing at SyncDev against the project's documentation before it goes live — if something here drifts out of date, it is a bug worth reporting.
| Tool | What it does |
|---|---|
| mattermost_list_channels | List channels in the workspace (public, private, and DMs) |
| mattermost_get_channel_history | Get messages from a channel with filtering options |
| mattermost_post_message | Post a new message to a channel |
| mattermost_reply_to_thread | Reply to a specific message thread |
| mattermost_add_reaction | Add an emoji reaction to a message |
| mattermost_get_thread_replies | Get all replies in a thread |
| mattermost_get_users | Get a list of users in the workspace |
| mattermost_get_user_profile | Get detailed profile information for a user |
| mattermost_run_monitoring | Trigger topic monitoring immediately |
| Configuration | The Configuration tool exposed by this server. |
Or using a config file:
```json
{
"mcpServers": {
"mattermost": {
"command": "node",
"args": ["/path/to/mattermost-mcp/build/index.js"]
}
}
}Configuration as documented by the project. Restart the client after saving.
| Variable | Description | Required |
|---|---|---|
| MATTERMOST_URL | Endpoint or connection string the server talks to. | Yes |
| MATTERMOST_TOKEN | Credential the server authenticates with. | Yes |
| MATTERMOST_TEAM_ID | Configuration value read at startup. | Optional |
| YOUR_TOKEN | Credential the server authenticates with. | Yes |
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