Hex.pm MCP Server

by joshrotenberg Your server? Claim it

answering

Hex.pm MCP is answering right now. Last checked 7 min ago. It exposes 24 tools. Last commit 31 Oct 2026.

MCP server for hex.pm and hexdocs.pm: search, inspect, compare, and audit Elixir packages

Uptime history 91 days of history · worst day 98%

91 days agonow

100.0%

Uptime 24h

92 of 92 checks

Tools

read from the server

954 ms

Response time

average over 24h

Stars

last commit 31 Oct 2026

What changed 2

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 27 September 2026. No other catalogue keeps this.

31 Oct a tool changed version

27 Sep a tool changed version

What the code does

We read the source, 2 d ago · tools taken from the live server · rules 995398eba69f

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

Runs an external command lib/hexpm_mcp/init.ex:445

          System.cmd(executable, args)

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 7 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add hexpm-mcp --transport http https://hexpm-mcp.fly.dev/mcp

Settings → Connectors → Add custom connector, then paste this address

https://hexpm-mcp.fly.dev/mcp

~/.codex/config.toml

[mcp_servers.hexpm-mcp]
url = "https://hexpm-mcp.fly.dev/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "hexpm-mcp": {
      "url": "https://hexpm-mcp.fly.dev/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "hexpm-mcp": {
      "type": "http",
      "url": "https://hexpm-mcp.fly.dev/mcp"
    }
  }
}

Available tools 24

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

toolbox

toolbox_category

List the curated projects in an Elixir Toolbox category.

toolbox_group

List the categories in a single Elixir Toolbox group.

toolbox_groups

Browse the Elixir Toolbox curated taxonomy of groups and categories.

toolbox_search

Search packages via Elixir Toolbox. Results carry GitHub/GitLab stats, popularity, and health signals not exposed by the raw hex.pm search.

toolbox_trending

List trending Elixir packages from Elixir Toolbox.

audit

audit

Audit a package's dependencies for risks. Checks each dependency for retired versions, stale packages, single-owner packages, and known vulnerabilities via OSV.dev.

audit_mix_deps

Audit mix.exs dependencies for risks.

docs

docs

Browse package documentation -- module listing.

search_docs

Search within a package's documentation by name.

alternatives

alternatives

Find and compare alternative packages for a given hex.pm package.

compare

compare

Compare 2-5 hex.pm packages side by side.

dep

dep_tree

Get the full transitive dependency tree for a package (BFS, max depth 5).

dependencies

dependencies

Get dependencies for a package version.

doc

doc_item

Get full documentation for a specific module or function.

downloads

downloads

Get download statistics for a hex.pm package.

features

features

Get optional features/extras for a package release.

health

health

Comprehensive health check for a hex.pm package.

info

info

Get detailed information about a hex.pm package.

owners

owners

Get owners/maintainers of a hex.pm package.

readme

readme

Get the README content for a hex.pm package.

release

release

Get detailed information about a specific package release.

search

Search for packages on hex.pm by name/keywords.

upgrade

upgrade_check

Check which mix.exs dependencies have newer versions available.

versions

versions

List all versions of a hex.pm package.

Endpoints

URL	Transport	State	Latency	Checked
https://hexpm-mcp.fly.dev/mcp	streamable-http	answering	3670 ms	7 min ago

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Hex.pm MCP — questions

Answers built from our own checks of this server.

What can Hex.pm MCP do?

It exposes 24 tools, read directly from the server on our last check. Among them: alternatives, audit, audit_mix_deps, compare, dependencies, dep_tree and 18 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

What is Hex.pm MCP mostly used for?

Its tools cluster around toolbox, docs and audit. That is what this server is built to work with — the grouping comes from the actual tool names, not from a category we assigned.

Is Hex.pm MCP working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 954 ms. The bar chart above shows every period we have measured.

How do I connect Hex.pm MCP?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Hex.pm MCP need an API key?

No. Hex.pm MCP completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 24 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Hex.pm MCP?

It answers our handshake in 954 ms on average, which is faster than 7% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is Hex.pm MCP open source?

The code is open source: it is published under the MIT licence, written in Elixir, 2 stars on GitHub and 1 open issue. The licence covers the code in the repository, not the hosted service at hexpm-mcp.fly.dev, which runs on its operator's own terms.