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Matrix MCP Server

Enables interaction with Matrix homeservers through the Model Context Protocol, providing tools for room management, messaging, user profiles, and search capabilities.

→ mjknowles/matrix-mcp-server· listed on glama
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// key findings
⚠️
Known vulnerabilities in dependencies: 3 high
Affects packages this MCP installs at runtime. Upgrade or remove the affected dependency.
✅
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 1 credential: MATRIX_CLIENT_SECRET
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// known CVEs in dependencies3 high1 medium

Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.

high@modelcontextprotocol/sdk@1.16.0GHSA-345p-7cg4-v4c7

@modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse

high@modelcontextprotocol/sdk@1.16.0GHSA-8r9q-7v3j-jr4g

Anthropic's MCP TypeScript SDK has a ReDoS vulnerability

high@modelcontextprotocol/sdk@1.16.0GHSA-w48q-cv73-mx4w

Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default

mediummatrix-js-sdk@37.4.0GHSA-mp7c-m3rh-r56v

matrix-js-sdk has insufficient validation when considering a room to be upgraded by another

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// required environment variables
This server reads these from process.env. You'll be asked to provide them before it can run.
configCORS_ALLOWED_ORIGINS— "" # Comma-separated allowed origins (empty = allow all)
configENABLE_HTTPS
configENABLE_OAUTH— true npm run dev
configENABLE_TOKEN_EXCHANGE— true # Exchange OAuth tokens for Matrix tokens
configIDP_AUTHORIZATION_URL— "https://keycloak.example.com/realms/matrix/protocol/openid-connect/auth"
configIDP_ISSUER_URL— "https://keycloak.example.com/realms/matrix"
configIDP_REGISTRATION_URL
configIDP_REVOCATION_URL
configIDP_TOKEN_URL— "https://keycloak.example.com/realms/matrix/protocol/openid-connect/token"
configMATRIX_CLIENT_ID— "your-matrix-client-id"
🔐 secretMATRIX_CLIENT_SECRET— "your-matrix-client-secret"
configMATRIX_HOMESERVER_URL— "https://matrix.example.com"
configMCP_SERVER_URL
configOAUTH_CALLBACK_URL— "http://localhost:3000/callback"
configOAUTH_SCOPES_SUPPORTED
configPORT
configSSL_CERT_PATH— "/path/to/certificate.crt"
configSSL_KEY_PATH— "/path/to/private.key"
// 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 4 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/mjknowles-matrix-mcp-server-rd032a)](https://m8ven.ai/mcp/mjknowles-matrix-mcp-server-rd032a)
commit: 88719f4da7d3bd79fe35a56d204604628aad7cca
code hash: 35444038279d5db6337b9d5f3e8845b75daa3e283d2218d490f10a9beda47b0b
verified: 6/11/2026, 10:56:09 AM
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