MCP Registry

A community driven registry service for Model Context Protocol (MCP) servers.

Development Status

This project is being built in the open and is currently in the early stages of development. Please see the overview discussion for the project scope and goals. If you would like to contribute, please check out the contributing guidelines.

Overview

The MCP Registry service provides a centralized repository for MCP server entries. It allows discovery and management of various MCP implementations with their associated metadata, configurations, and capabilities.

Features

• RESTful API for managing MCP registry entries (list, get, create, update, delete)
• Health check endpoint for service monitoring
• Support for various environment configurations
• Graceful shutdown handling
• MongoDB and in-memory database support
• Comprehensive API documentation
• Pagination support for listing registry entries

Getting Started

Prerequisites

• Go 1.23.x (required - check with go version)
• MongoDB
• Docker (optional, but recommended for development)

For development:

• golangci-lint v2.3.1 - Install with:

  curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v2.3.1
  

Running

The easiest way to get the registry running is to use docker compose. This will setup the MCP Registry service, import the seed data and run MongoDB in a local Docker environment.

# Run the registry and MongoDB with docker compose
docker compose up --build

This will start the MCP Registry service and MongoDB with Docker, exposing it on port 8080.

Building

If you prefer to run the service locally without Docker, you can build and run it directly using Go.

# Build a registry executable
go build ./cmd/registry

This will create the registry binary in the current directory. You'll need to have MongoDB running locally or with Docker.

By default, the service will run on http://localhost:8080.

Development

Linting

The project uses golangci-lint with extensive checks. Always run linting before pushing:

# Run all linters (same as CI)
golangci-lint run --timeout=5m

# Check formatting
gofmt -s -l .

# Fix formatting
gofmt -s -w .

Git Hooks (Optional)

To automatically run linting before commits:

git config core.hooksPath .githooks

This will prevent commits that fail linting or have formatting issues.

Project Structure

├── api/           # OpenApi specification
├── cmd/           # Application entry points
├── config/        # Configuration files
├── internal/      # Private application code
│   ├── api/       # HTTP server and request handlers
│   ├── config/    # Configuration management
│   ├── model/     # Data models
│   └── service/   # Business logic
├── pkg/           # Public libraries
├── scripts/       # Utility scripts
└── tools/         # Command line tools
    └── publisher/ # Tool to publish MCP servers to the registry

API Documentation

The API is documented using Swagger/OpenAPI. You can access the interactive Swagger UI at:

/v0/swagger/index.html

This provides a complete reference of all endpoints with request/response schemas and allows you to test the API directly from your browser.

API Endpoints

Health Check

GET /v0/health

Returns the health status of the service:

{
  "status": "ok"
}

Registry Endpoints

List Registry Server Entries

GET /v0/servers

Lists MCP registry server entries with pagination support.

Query parameters:

• limit: Maximum number of entries to return (default: 30, max: 100)
• cursor: Pagination cursor for retrieving next set of results

Response example:

{
  "servers": [
    {
      "id": "123e4567-e89b-12d3-a456-426614174000",
      "name": "Example MCP Server",
      "url": "https://example.com/mcp",
      "description": "An example MCP server",
      "created_at": "2025-05-17T17:34:22.912Z",
      "updated_at": "2025-05-17T17:34:22.912Z"
    }
  ],
  "metadata": {
    "next_cursor": "123e4567-e89b-12d3-a456-426614174000",
    "count": 30
  }
}

Get Server Details

GET /v0/servers/{id}

Retrieves detailed information about a specific MCP server entry.

Path parameters:

• id: Unique identifier of the server entry

Response example:

{
  "id": "01129bff-3d65-4e3d-8e82-6f2f269f818c",
  "name": "io.github.gongrzhe/redis-mcp-server",
  "description": "A Redis MCP server (pushed to https://github.com/modelcontextprotocol/servers/tree/main/src/redis) implementation for interacting with Redis databases. This server enables LLMs to interact with Redis key-value stores through a set of standardized tools.",
  "repository": {
    "url": "https://github.com/GongRzhe/REDIS-MCP-Server",
    "source": "github",
    "id": "907849235"
  },
  "version_detail": {
    "version": "0.0.1-seed",
    "release_date": "2025-05-16T19:13:21Z",
    "is_latest": true
  },
  "packages": [
    {
      "registry_name": "docker",
      "name": "@gongrzhe/server-redis-mcp",
      "version": "1.0.0",
      "package_arguments": [
        {
          "description": "Docker image to run",
          "is_required": true,
          "format": "string",
          "value": "mcp/redis",
          "default": "mcp/redis",
          "type": "positional",
          "value_hint": "mcp/redis"
        },
        {
          "description": "Redis server connection string",
          "is_required": true,
          "format": "string",
          "value": "redis://host.docker.internal:6379",
          "default": "redis://host.docker.internal:6379",
          "type": "positional",
          "value_hint": "host.docker.internal:6379"
        }
      ]
    }
  ]
}

Publish a Server Entry

POST /v0/publish

Publishes a new MCP server entry to the registry. Authentication is required via Bearer token in the Authorization header.

Headers:

• Authorization: Bearer token for authentication (e.g., Bearer your_token_here)
• Content-Type: application/json

Request body example:

{
    "description": "<your description here>",
    "name": "io.github.<owner>/<server-name>",
    "packages": [
        {
            "registry_name": "npm",
            "name": "@<owner>/<server-name>",
            "version": "0.2.23",
            "package_arguments": [
                {
                    "description": "Specify services and permissions.",
                    "is_required": true,
                    "format": "string",
                    "value": "-s",
                    "default": "-s",
                    "type": "positional",
                    "value_hint": "-s"
                }
            ],
            "environment_variables": [
                {
                    "description": "API Key to access the server",
                    "name": "API_KEY"
                }
            ]
        },{
            "registry_name": "docker",
            "name": "@<owner>/<server-name>-cli",
            "version": "0.123.223",
            "runtime_hint": "docker",
            "runtime_arguments": [
                {
                    "description": "Specify services and permissions.",
                    "is_required": true,
                    "format": "string",
                    "value": "--mount",
                    "default": "--mount",
                    "type": "positional",
                    "value_hint": "--mount"
                }
            ],
            "environment_variables": [
                {
                    "description": "API Key to access the server",
                    "name": "API_KEY"
                }
            ]
        }
    ],
    "repository": {
        "url": "https://github.com/<owner>/<server-name>",
        "source": "github"
    },
    "version_detail": {
        "version": "0.0.1-<publisher_version>"
    }
}

Response example:

{
  "message": "Server publication successful",
  "id": "1234567890abcdef12345678"
}

Ping Endpoint

GET /v0/ping

Simple ping endpoint that returns environment configuration information:

{
  "environment": "dev",
  "version": "registry-<sha>"
}

Configuration

The service can be configured using environment variables:

Variable	Description	Default
MCP_REGISTRY_APP_VERSION	Application version	dev
MCP_REGISTRY_DATABASE_TYPE	Database type	mongodb
MCP_REGISTRY_COLLECTION_NAME	MongoDB collection name	servers_v2
MCP_REGISTRY_DATABASE_NAME	MongoDB database name	mcp-registry
MCP_REGISTRY_DATABASE_URL	MongoDB connection string	mongodb://localhost:27017
MCP_REGISTRY_GITHUB_CLIENT_ID	GitHub App Client ID
MCP_REGISTRY_GITHUB_CLIENT_SECRET	GitHub App Client Secret
MCP_REGISTRY_LOG_LEVEL	Log level	info
MCP_REGISTRY_SEED_FILE_PATH	Path to import seed file	data/seed.json
MCP_REGISTRY_SEED_IMPORT	Import seed.json on first run	true
MCP_REGISTRY_SERVER_ADDRESS	Listen address for the server	:8080

Testing

Run the test script to validate API endpoints:

./scripts/test_endpoints.sh

You can specify specific endpoints to test:

./scripts/test_endpoints.sh --endpoint health
./scripts/test_endpoints.sh --endpoint servers

License

See the LICENSE file for details.

Contributing

See the CONTRIBUTING file for details.