dhoelzgen
I created a MCP server for Hex package versions
I am currently giving Cursor another try to code Elixir apps. Although I am quite happy with how it evolved, I kept getting annoyed by the agent adding outdated packages, which I manually had to set to the latest version from hex.pm.
To solve this, I wrote a tiny MCP server, which allows the editor to retrieve the correct versions before adding packages to the project, and it works quite well:
If you have the same issue and want to give it a try, I deployed it to fly: https://hex-mcp.9elements.com/
Be sure to activate agent mode; at least for me, Cursor seems to ignore this function when in normal chat or composer mode.
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cpursley
This is great. Has me thinking about building an MCP that grabs the full Ecto schema and Elixir types so that cursor is more aware of the type system.
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dhoelzgen
I did not try, but during the discussion of my post on social media, zoedsoupe mentioned their project, which seems to be an Elixir library for building both server and client MCP apps, might be worth a look:
https://github.com/cloudwalk/hermes-mcp
Just to be clear, this is not the package I have built my server on, I used:
josefrichter
I am experimenting with local MCP server fed with PDF books I own, like Sasa Juric’s Elixir in Action and others. The idea is plug them into editor and use them in a sort of RAG fashion. I’m mostly using Windsurf with Sonnet 3.7 these days.
Anyone else and more experienced running similar setup? I’m still in trial & error stage, so looking for inspiration and trying to avoid reinventing the wheel.
josefrichter
For now, I ended up using R2R locally in docker GitHub - SciPhi-AI/R2R: SoTA production-ready AI retrieval system. Agentic Retrieval-Augmented Generation (RAG) with a RESTful API. · GitHub
I had to write a simple python bridge (LLMs helped with that). I filled it with 10 important elixir books and I regularly use that during coding to consult various topics. It seems to work fairly nicely and I find it pretty helpful.
Next step would probably be ingesting some important blogs’ content. So far I am using web search & fetch mcps to access these resources.
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