Summary
An agent can find other MCP servers at runtime instead of at config time.
One call searches a directory of remote endpoints, and the live variants drop the ones that have stopped answering — so what comes back is a shortlist worth trying rather than a list worth checking.
What it is
An open directory of remote MCP servers that is itself a remote MCP server, at https://mcpub.dev/mcp. Anyone can submit an endpoint, there is no review step, and a crawler re-checks them so the live calls return only the ones that answered.
What you get
- Keyword search across archived endpoints, paginated by offset and limit
- The same search restricted to endpoints verified as still alive
- The whole archive listed, or only the live subset
- A single endpoint looked up by its URL
- Your own endpoint submitted with a description
Requirements
A client that can reach a remote endpoint over HTTP. No account, no key, no review. To be listed, a domain needs a /.well-known/mcp.json — any content will do, even an empty object.