MCPX Registry
Ready-made MCPX manifests for popular APIs
Each manifest is an OpenAPI 3.1.0 spec that describes a REST API's endpoints, parameters, and authentication — everything an AI agent needs to discover and call the API automatically. Install the MCPX skill, point it at a manifest, and your agent can use the API immediately.
How it works
Three steps to connect any registered API
Install the MCPX skill
A one-time setup that teaches your AI agent how to use MCPX manifests.
Pick a manifest from the registry
Browse the services below. Each one has a manifest URL you can give to your agent.
Authenticate and go
Your agent handles auth (API key or OAuth), discovers the available tools, and starts making calls.
Available services
4 APIs and counting
GitHub API
GitHub REST API for repository management, user information, and code search
Gmail
Read, send, search, and organise emails in the authenticated user's Gmail account.
Meta for Developers API
Access Meta's platform APIs including Facebook, Instagram, and WhatsApp Business APIs for managing pages, posts, advertising, and user data.
Stripe
Accept payments, manage subscriptions, and handle billing for the authenticated user's Stripe account.
Want to add your API to the registry? Publish an OpenAPI spec at /.well-known/mcp.yaml on your domain, or submit a manifest to the MCPX project.