About Hex MCP Server
Hex MCP Server is an MCP server that gives AI tools such as Cursor real-time version information for Hex packages. It is aimed at developers working on Elixir projects who want AI-assisted dependency changes to use current versions.
Key features
- 01Real-time Hex package version information
- 02Targeted at Elixir project dependencies
- 03Accessible via an SSE server URL
Use cases
- 01Checking package versions when adding Elixir dependencies in Cursor
- 02Helping AI assistants choose up-to-date Hex package versions
MCP support
This is an MCP server that clients such as Cursor connect to through an SSE URL to receive Hex package version data.
Configuration
Local server config is the same for every client. Copy it into your client’s MCP config file.
We haven’t collected a package or remote endpoint for this server. Follow the instructions in the project README.
Tools
Local servers expose tools only once running on your machine, and the maintainer has not provided a tool list.
Details
From the project READMEHex MCP Server
A Model Context Protocol (MCP) server that provides real-time Hex package version information to AI tools like Cursor. This service helps ensure that AI-assisted development uses the correct and most up-to-date package versions when adding dependencies to Elixir projects.
What is MCP?
The Model Context Protocol (MCP) is an open protocol that standardizes how applications provide context to Large Language Models (LLMs). Think of it like a USB-C port for AI applications. For more information about MCP, visit the official documentation.
Using with Cursor
Cursor supports MCP servers out of the box. To get accurate Hex package version suggestions in your Elixir projects, add this server to your Cursor configuration.
Server URL
https://hex-mcp.9elements.com/sse
For detailed setup instructions, visit the Cursor MCP documentation.
Development Setup
To start your Phoenix server locally:
- Run
mix setupto install and setup dependencies - Start Phoenix endpoint with
mix phx.serveror inside IEx withiex -S mix phx.server - Visit
localhost:4000from your browser
In order to allow the specific sites, adjust your /etc/hosts like this:
127.0.0.1 hex-mcp.localhost
127.0.0.1 gem-mcp.localhost
127.0.0.1 npm-mcp.localhost
Disclaimer
While this service uses the API provided by hex.pm, we are not affiliated with or endorsed by hex.pm. The service is provided as-is without any warranty. Use at your own discretion.
Production Deployment
For production deployment instructions, please refer to the Phoenix deployment guides.
Learn More
Credits
Built with ❤️ by Daniel Hoelzgen from 9elements
Legal
Comments
New to MCP?
From what the protocol is to installing your first server, these answers cover most first questions.
An open protocol that defines how AI applications connect to external tools and data in a uniform way. Clients talk to the model; MCP servers provide tools, resources and prompt templates. They exchange standard messages, so one server can be reused by many clients.