Hex

You run a Hex MCP Server that provides real-time Hex package version information to MCP clients, helping AI tools and IDEs suggest correct dependencies for Elixir projects. This server exposes a standardized MCP endpoint so downstream tools can request up-to-date Hex data on demand.

How to use

Connect your MCP client to the server at the following endpoint to receive live Hex package version data: https://hex-mcp.9elements.com/sse. You can use this endpoint to power real-time suggestions in tools like Cursor when working on Elixir projects.

How to install

Prerequisites: you need Elixir and Erlang installed, along with Phoenix and Mix since this is a Phoenix-based MCP server.

mix setup
mix phx.server

If you want to run the server from an interactive session, you can start it inside IEx:

iex -S mix phx.server

Then open your browser to the local site to verify the server is running.

127.0.0.1 hHex-mcp.localhost 127.0.0.1 gem-mcp.localhost 127.0.0.1 npm-mcp.localhost

## Additional notes

For production deployment, follow Phoenix deployment best practices to ensure reliability and scalability. If you are configuring local development environments, the server may be accessed at `localhost:4000` during development. The server serves an SSE feed at the URL shown above for MCP clients to subscribe to live Hex data.