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Mattermost

Official Mattermost MCP server, built into the Mattermost Agents plugin. Read, search and post.

Go Remote

★ 257 stars Last pushed 2026-11-07 License: Apache-2.0

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Connect

Review any command before running it. Package names and URLs come from the server's own registry entry.

Remote (streamable-http)

https://{mattermost_host}/plugins/mattermost-ai/mcp-server/mcp

Claude Code:

claude mcp add --transport http mattermost-plugin-agents https://{mattermost_host}/plugins/mattermost-ai/mcp-server/mcp --header "Authorization: <YOUR_VALUE>"

Or add to your MCP client config:

{
  "mcpServers": {
    "mattermost-plugin-agents": {
      "url": "https://{mattermost_host}/plugins/mattermost-ai/mcp-server/mcp",
      "headers": {
        "Authorization": "<YOUR_VALUE>"
      }
    }
  }
}

Authorization secret — Optional. OAuth 2.0 with dynamic client registration is the default and needs no header. To use a Mattermost Personal Access Token instead, set this to Bearer followed by the token.