Mattermost MCP Server

by vriesdemichaelio.github.vriesdemichael/mm-mcpv0.2.0

Read, search and post in Mattermost as yourself or a bot.

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Active1d ago

Install Mattermost MCP server

No published package or hosted endpoint yet — see the repository README for build-from-source instructions.

Variable	Required	Secret	Description
MM_MCP_ALLOW_WRITES	—	—	Offer the tools that post and change things. Each change others see asks you before it acts, which needs a client that shows MCP elicitation questions; following a thread, saving a post or a draft, reminders and typing do not ask.
MM_MCP_CA_FILE	—	—	A PEM file of certificate authorities to trust beside your system's, for a Mattermost whose certificate your organisation signed itself. Leave it empty otherwise.
MM_MCP_DOWNLOAD_DIR	—	—	Where save_file writes attachments. Leave it empty for your Downloads directory.
MM_MCP_MARK_AI_GENERATED	—	—	Mark every post and edit the model writes with Mattermost's own marker for text written with AI.
MM_TOKEN	—	yes	A personal access token or a bot token. Where those are switched off, leave it empty after logging in once with mm-mcp login --url <address> in a terminal, which keeps your session in the system's credential store.
MM_URL	yes	—	The address you open Mattermost at, such as https://chat.example.com.

Active — last maintenance signal 1d ago. The newest of the signals below sets the band.

›Does Mattermost require an API key?

Yes. It expects MM_URL, MM_TOKEN, of which 1 is a secret.

›Can I use Mattermost as a remote (hosted) MCP server?

No hosted endpoint is published; it runs locally over stdio.

›Is Mattermost in the official MCP registry?

Yes, as io.github.vriesdemichael/mm-mcp.