Hex.pm MCP

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

CommunityOnlineNo sign-inGlobalFreeRead-only

What it can do

    What data it sees

    Do you need an account

    No: the server works without sign-in

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

    How to connect

    How to connect Hex.pm MCP to Claude

    The server address to paste into Claude settings:

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

    1. Open Claude (claude.ai or the desktop app).
    2. Go to Settings → Connectors.
    3. Click Add custom connector.
    4. Paste the server address copied below into Remote MCP server URL and click Add.
    5. In a chat, click + → Connectors and switch the new connector on.

    Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

    Authorization

    After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

    How to connect Hex.pm MCP to ChatGPT

    The server address to paste into ChatGPT settings:

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

    1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
    2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
    3. Open Settings → Connectors and click Create.
    4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
    5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
    6. In a new chat open + → Apps/Connectors and enable the connector.

    OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

    Authorization

    On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

    How to connect Hex.pm MCP to Cursor

    The server address to paste into Cursor settings:

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

    Fastest: click Open in Cursor below and confirm the prompt.

    Manually:

    1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
    2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
    3. Save the file. The server appears in the MCP list; authorize it there if asked.

    Authorization

    If the service needs sign-in, an authorize button appears next to the server in the MCP list.

    Server tool list (24)

    Raw names from tools/list. Only developers need these.

    alternativesFind and compare alternative packages for a given hex.pm package.
    auditAudit 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_depsAudit mix.exs dependencies for risks.
    compareCompare 2-5 hex.pm packages side by side.
    dep_treeGet the full transitive dependency tree for a package (BFS, max depth 5).
    dependenciesGet dependencies for a package version.
    doc_itemGet full documentation for a specific module or function.
    docsBrowse package documentation -- module listing.
    downloadsGet download statistics for a hex.pm package.
    featuresGet optional features/extras for a package release.
    healthComprehensive health check for a hex.pm package.
    infoGet detailed information about a hex.pm package.
    ownersGet owners/maintainers of a hex.pm package.
    readmeGet the README content for a hex.pm package.
    releaseGet detailed information about a specific package release.
    searchSearch for packages on hex.pm by name/keywords.
    search_docsSearch within a package's documentation by name.
    toolbox_categoryList the curated projects in an Elixir Toolbox category.
    toolbox_groupList the categories in a single Elixir Toolbox group.
    toolbox_groupsBrowse the Elixir Toolbox curated taxonomy of groups and categories.
    toolbox_searchSearch packages via Elixir Toolbox. Results carry GitHub/GitLab stats, popularity, and health signals not exposed by the raw hex.pm search.
    toolbox_trendingList trending Elixir packages from Elixir Toolbox.
    upgrade_checkCheck which mix.exs dependencies have newer versions available.
    versionsList all versions of a hex.pm package.