Mattermost MCP Server

Enables Claude to fetch RSS feeds and post messages to a self-hosted Mattermost server using OAuth authentication.

→ jarviscodes/mattermost-mcp · listed on glama

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// key findings

✅

No credential exfiltration, no sensitive file access, no obfuscation

Static analysis found nothing flowing your secrets to unexpected places.

✅

Open source with a license and README

Anyone can audit the code, the license is declared, and the publisher documents what it does.

🔐

You'll be asked for 3 credentials: MCP_OWNER_PASSWORD, MATTERMOST_TOKEN, MCP_API_KEY

These are read from process.env at runtime. Make sure you trust where they’ll be sent.

// required environment variables

This server reads these from process.env. You'll be asked to provide them before it can run.

configMCP_ISSUER

configMCP_RESOURCE

🔐 secretMCP_OWNER_PASSWORD— the password you'll type on the consent screen when

configMCP_OAUTH_DB— /var/lib/mattermost-mcp/oauth.db — persisted by the unit's

configMCP_ALLOWED_HOSTS

configMCP_ALLOWED_ORIGINS

configMATTERMOST_URL— "": "https://mattermost.your-domain.example",

🔐 secretMATTERMOST_TOKEN— the fresh bot token.

configMATTERMOST_TEAM— "": "YOUR-TEAM"

configMCP_AUTH— Set =bearer and MCP_API_KEY=... to gate the HTTP server with a

configMCP_PATH

🔐 secretMCP_API_KEY— Set MCP_AUTH=bearer and =... to gate the HTTP server with a

configMCP_TRANSPORT— ( defaults to stdio.) This only works on that machine while

configMCP_HOST

configMCP_PORT

// full audit trail

The full breakdown of what we checked, the deductions that landed, the network hosts, the dependency advisories, and concrete fix guidance is available to verified publishers.

// improvement guidance — verified publishers only

We have 5 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.

// embed badge in your README

[![M8ven Score](https://m8ven.ai/badge/mcp/jarviscodes-mattermost-mcp-10utxc)](https://m8ven.ai/mcp/jarviscodes-mattermost-mcp-10utxc)

commit: 6f0e35b1ad25714e2cf7e552f7298f96470bd664

code hash: b449984807841e36c673f2e22fbbd9ec14165c7c5dd7da871dae58b64b3572fd

verified: 6/20/2026, 9:14:52 AM

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