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MCP Queen

Official registry Other

The evidence layer for MCP: live operational grades plus Trust Receipts for every registry server.

Source code Website Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http mcp-queen 'https://mcpqueen.com/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "mcp-queen": {
            "type": "http",
            "url": "https://mcpqueen.com/mcp"
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. MCP Queen
  2. Use the hosted endpoint
  3. Optional local stdio bridge
  4. What this public repository contains
  5. Verify locally
  6. License and support

MCP Queen

MCP Queen is a public discovery and evidence service for Model Context Protocol servers. It publishes dated operational observations, tool metadata, and separate Trust Receipts so developers and agents can inspect evidence before deciding what to connect.

An MCP Queen operational grade is not a security, privacy, data-quality, or compliance certification. Missing evidence is unaudited, not safe.

Use the hosted endpoint

The public Streamable HTTP endpoint requires no account for rate-limited evaluation:

https://mcpqueen.com/mcp

It exposes six read-only discovery/evidence tools and one additive feedback tool:

  • search_servers
  • search_tools
  • list_grades
  • get_server_grade
  • get_trust_receipt
  • search_trust_evidence
  • submit_feedback — writes only to a quarantined review queue

For human-readable setup and current service limits, use mcpqueen.com/connect.

Claude Code
claude mcp add --transport http mcpqueen https://mcpqueen.com/mcp
Direct protocol examples

The model-free examples under examples/clients call the hosted endpoint directly:

node examples/clients/node-http.mjs "GitHub issue triage"

The Python version uses the official MCP SDK. Additional examples show bounded integration with LangChain, LlamaIndex, Cloudflare Agents, Hugging Face, and the OpenAI Responses API. Agent examples allowlist only the six read-only tools; submit_feedback is excluded from automatic model access.

Optional local stdio bridge

This repository contains a small zero-dependency stdio bridge for clients that cannot connect to a remote Streamable HTTP endpoint directly. The bridge does not contain MCP Queen's hosted implementation or evidence corpus; it forwards JSON-RPC messages to https://mcpqueen.com/mcp.

git clone https://github.com/mcpqueen/mcpqueen.git
cd mcpqueen
npm ci
npm start

To point the bridge at another compatible endpoint during local testing, set MCPQUEEN_MCP_URL in the process environment.

Docker is also supported:

docker build -t mcpqueen-bridge .
docker run --rm -i mcpqueen-bridge

What this public repository contains

The production Worker, deployment configuration, evidence database, submission packages, operational records, and private source history are not part of this public developer surface. This repository is not a production deployment source.

Verify locally

npm ci
npm test

The tests exercise the bridge against a local mock endpoint and verify that public documentation and package scripts reference files that are actually in this repository.

License and support

Code in this repository is available under the MIT License. Product documentation, privacy, terms, and support are available from mcpqueen.com.

Frequently asked questions

What is MCP Queen?

The evidence layer for MCP: live operational grades plus Trust Receipts for every registry server.

How do I install MCP Queen?

It runs as a remote server. In Claude Code: claude mcp add --transport http mcp-queen 'https://mcpqueen.com/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does MCP Queen need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is MCP Queen open source?

Yes. Its code is on GitHub under the MIT license.

Who maintains MCP Queen?

It is published by mcpqueen. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.