MCP Registry Navigator

MCP Registry Navigator

Lets users discover, compare, and audit public MCP servers from the official registry, validate server.json metadata, and generate installation snippets and publication checklists.

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MCP Registry Navigator

Read-only MCP server for discovering, comparing, and auditing public servers from the official Model Context Protocol Registry.

Serveur MCP en lecture seule pour decouvrir, comparer et auditer les serveurs publics du registre officiel Model Context Protocol.

Overview

MCP Registry Navigator helps agents and developers answer practical questions before installing or publishing an MCP server:

  • Which MCP server fits a task best?
  • What package registry, transport, and install command does it use?
  • Is a server.json file ready for registry publication?
  • What checklist should be followed before publishing a PyPI, npm, or OCI MCP server?

The server does not edit user files. It returns structured reports, generated configuration snippets, and review checklists that callers can inspect and apply manually.

Vue d'ensemble

MCP Registry Navigator aide les agents et les developpeurs a prendre de bonnes decisions avant d'installer ou de publier un serveur MCP :

  • Quel serveur MCP convient le mieux a une tache donnee ?
  • Quel registre de package, transport et commande d'installation utilise-t-il ?
  • Un fichier server.json est-il pret pour une publication dans le registre ?
  • Quelle checklist suivre avant de publier un serveur MCP via PyPI, npm ou OCI ?

Le serveur ne modifie aucun fichier utilisateur. Il retourne des rapports structures, des snippets de configuration et des checklists que l'appelant peut relire puis appliquer manuellement.

Features / Fonctionnalites

  • Search latest servers from https://registry.modelcontextprotocol.io.
  • Fetch a specific server by registry name and version.
  • Compare server package types, transports, and descriptions.
  • Validate server.json metadata before publication.
  • Generate MCP client install snippets for PyPI, npm, and OCI packages.
  • Prepare publication checklists for PyPI, npm, and OCI registry flows.
  • Expose MCP tools, resources, and prompts through the official Python SDK v2.
  • Use a local TTL JSON cache and deterministic test fixtures.

MCP Primitives

Tools

  • search_servers
  • get_server
  • compare_servers
  • validate_server_json
  • generate_install_config
  • prepare_publish_checklist

Resources

  • registry://servers/{name}
  • registry://latest
  • registry://cache/status

Prompts

  • choose_mcp_server
  • audit_mcp_metadata
  • prepare_mcp_release

Requirements / Prerequis

  • Python 3.12 or newer.
  • uv for local Python dependency management.
  • Node.js 22.19.0 or newer only when using the MCP Inspector.

Installation

From a local checkout:

uv sync
uv run mcp-registry-navigator --version

Depuis un clone local :

uv sync
uv run mcp-registry-navigator --version

Usage

Run over stdio, the default transport for local MCP clients:

uv run mcp-registry-navigator

Lancer le serveur en stdio, le transport par defaut pour les clients MCP locaux :

uv run mcp-registry-navigator

Run as Streamable HTTP for local testing:

uv run mcp-registry-navigator --transport streamable-http --host 127.0.0.1 --port 8000

Lancer le serveur en Streamable HTTP pour les tests locaux :

uv run mcp-registry-navigator --transport streamable-http --host 127.0.0.1 --port 8000

Run the MCP Inspector:

npm install
npm run inspect

Lancer le MCP Inspector :

npm install
npm run inspect

This repository includes .node-version and package.json so local inspection uses @modelcontextprotocol/inspector v2 instead of the deprecated v1 launcher used by some mcp dev environments.

Ce depot inclut .node-version et package.json afin que l'inspection locale utilise @modelcontextprotocol/inspector v2 au lieu de l'ancien lanceur v1 utilise par certains environnements mcp dev.

Example Client Config

For a local checkout:

{
  "mcpServers": {
    "mcp-registry-navigator": {
      "command": "uv",
      "args": [
        "--directory",
        "/path/to/mcp-registry-navigator",
        "run",
        "mcp-registry-navigator"
      ]
    }
  }
}

After publishing to PyPI, the command can be simplified:

{
  "mcpServers": {
    "mcp-registry-navigator": {
      "command": "uvx",
      "args": ["mcp-registry-navigator"]
    }
  }
}

Development / Developpement

uv run python -m pytest -q
uv run ruff check .
uv run mypy
uv build
npm run inspect

The test suite uses fake registry responses for deterministic offline coverage. The MCP integration tests use the SDK in-memory client and do not open ports.

La suite de tests utilise de fausses reponses du registre pour rester deterministe et fonctionner hors ligne. Les tests d'integration MCP utilisent le client en memoire du SDK et n'ouvrent pas de port reseau.

Cache

The default cache file is:

~/.cache/mcp-registry-navigator/registry-cache.json

Set XDG_CACHE_HOME to change the cache root. Use NullCache in tests or embedding code when no disk writes are desired.

Le fichier de cache par defaut est :

~/.cache/mcp-registry-navigator/registry-cache.json

Definissez XDG_CACHE_HOME pour changer la racine du cache. Utilisez NullCache dans les tests ou dans du code embarque si aucune ecriture disque ne doit etre effectuee.

Repository Status / Etat du depot

This project is currently alpha software. APIs and generated recommendations may change while the MCP Registry and Python SDK continue to evolve.

Ce projet est actuellement en phase alpha. Les APIs et les recommandations generees peuvent changer pendant que le registre MCP et le SDK Python evoluent.

Release Notes / Notes de publication

Before publishing to PyPI, add [project.urls] in pyproject.toml with the real GitHub repository URL and issue tracker.

Avant une publication sur PyPI, ajoutez [project.urls] dans pyproject.toml avec l'URL reelle du depot GitHub et le lien vers le suivi des issues.

If later publishing this server to the official MCP Registry as a PyPI package, add the registry verification marker to this README:

<!-- mcp-name: io.github.YOUR_GITHUB_USERNAME/mcp-registry-navigator -->

Si ce serveur est ensuite publie dans le registre MCP officiel comme package PyPI, ajoutez le marqueur de verification ci-dessus dans ce README.

License / Licence

MIT. See LICENSE.

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