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🚀 MCP Registry

The MCP registry offers MCP clients a list of MCP servers, functioning like an app store for MCP servers.

| ⚡️ Live API docs | | 📖 Full documentation

🚀 Quick Start

Pre - requisites

• Docker
• Go 1.24.x
• ko - Container image builder for Go (installation instructions)
• golangci - lint v2.4.0

Running the server

# Start full development environment
make dev-compose

This starts the registry at localhost:8080 with PostgreSQL. The database uses ephemeral storage and is reset each time you restart the containers, ensuring a clean state for development and testing.

Note: The registry uses ko to build container images. The make dev-compose command automatically builds the registry image with ko and loads it into your local Docker daemon before starting the services.

By default, the registry seeds from the production API with a filtered subset of servers (to keep startup fast). This ensures your local environment mirrors production behavior and all seed data passes validation. For offline development you can seed from a file without validation with MCP_REGISTRY_SEED_FROM=data/seed.json MCP_REGISTRY_ENABLE_REGISTRY_VALIDATION=false make dev-compose.

The setup can be configured with environment variables in docker-compose.yml - see .env.example for a reference.

# Run latest stable release
docker run -p 8080:8080 ghcr.io/modelcontextprotocol/registry:latest

# Run latest from main branch (continuous deployment)
docker run -p 8080:8080 ghcr.io/modelcontextprotocol/registry:main

# Run specific release version
docker run -p 8080:8080 ghcr.io/modelcontextprotocol/registry:v1.0.0

# Run development build from main branch
docker run -p 8080:8080 ghcr.io/modelcontextprotocol/registry:main-20250906-abc123d

Publishing a server

To publish a server, we've built a simple CLI. You can use it with:

# Build the latest CLI
make publisher

# Use it!
./bin/mcp-publisher --help

See the publisher guide for more details.

Other commands

# Run lint, unit tests and integration tests
make check

There are also a few more helpful commands for development. Run make help to learn more, or look in Makefile.

✨ Features

The MCP registry provides a list of MCP servers for MCP clients, similar to an app - store for MCP servers. It supports multiple authentication methods for server publishing and has entered an API freeze for stability.

📦 Installation

Prerequisites

• Docker
• Go 1.24.x
• ko (Container image builder for Go)
• golangci - lint v2.4.0

Steps

1. Start the full development environment:

make dev-compose

2. For running a pre - built Docker image, you can choose from different tags:

# Run latest stable release
docker run -p 8080:8080 ghcr.io/modelcontextprotocol/registry:latest

💻 Usage Examples

Publishing a Server

# Build the latest CLI
make publisher

# Use it!
./bin/mcp-publisher --help

Running Tests

# Run lint, unit tests and integration tests
make check

📚 Documentation

Development Status

2025 - 10 - 24 update: The Registry API has entered an API freeze (v0.1) 🎉. For the next month or more, the API will remain stable with no breaking changes, allowing integrators to confidently implement support. This freeze applies to v0.1 while development continues on v0. We'll use this period to validate the API in real - world integrations and gather feedback to shape v1 for general availability. Thank you to everyone for your contributions and patience—your involvement has been key to getting us here!

2025 - 09 - 08 update: The registry has launched in preview 🎉 (announcement blog post). While the system is now more stable, this is still a preview release and breaking changes or data resets may occur. A general availability (GA) release will follow later. We'd love your feedback in GitHub discussions or in the #registry - dev Discord (joining details here).

Current key maintainers:

• Adam Jones (Anthropic) @domdomegg
• Tadas Antanavicius (PulseMCP) @tadasant
• Toby Padilla (GitHub) @toby
• Radoslav (Rado) Dimitrov (Stacklok) @rdimitrov

Contributing

We use multiple channels for collaboration - see modelcontextprotocol.io/community/communication.

Often (but not always) ideas flow through this pipeline:

• Discord - Real - time community discussions
• Discussions - Propose and discuss product/technical requirements
• Issues - Track well - scoped technical work
• Pull Requests - Contribute work towards issues

Architecture

Project Structure

├── cmd/                     # Application entry points
│   └── publisher/           # Server publishing tool
├── data/                    # Seed data
├── deploy/                  # Deployment configuration (Pulumi)
├── docs/                    # Documentation
├── internal/                # Private application code
│   ├── api/                 # HTTP handlers and routing
│   ├── auth/                # Authentication (GitHub OAuth, JWT, namespace blocking)
│   ├── config/              # Configuration management
│   ├── database/            # Data persistence (PostgreSQL)
│   ├── service/             # Business logic
│   ├── telemetry/           # Metrics and monitoring
│   └── validators/          # Input validation
├── pkg/                     # Public packages
│   ├── api/                 # API types and structures
│   │   └── v0/              # Version 0 API types
│   └── model/               # Data models for server.json
├── scripts/                 # Development and testing scripts
├── tests/                   # Integration tests
└── tools/                   # CLI tools and utilities
    └── validate-*.sh        # Schema validation tools

Authentication

Publishing supports multiple authentication methods:

• GitHub OAuth - For publishing by logging into GitHub
• GitHub OIDC - For publishing from GitHub Actions
• DNS verification - For proving ownership of a domain and its subdomains
• HTTP verification - For proving ownership of a domain

The registry validates namespace ownership when publishing. E.g. to publish...:

• io.github.domdomegg/my-cool-mcp you must login to GitHub as domdomegg, or be in a GitHub Action on domdomegg's repos
• me.adamjones/my-cool-mcp you must prove ownership of adamjones.me via DNS or HTTP challenge

Community Projects

Check out community projects to explore notable registry - related work created by the community.

More documentation

See the documentation for more details if your question has not been answered here!