SkillFoxx

pmndrs docs: react-three-fiber documentation over MCP

pmndrs docs

A key-free remote MCP server that gives an agent the docs and examples of react-three-fiber, drei, zustand and jotai page by page

  • 120 ★ on the repository
  • Last commit
  • MIT
MCP serverOfficial

Minimal access

Why this level

  • The server gives the agent public docs and examples read-only and asks for no credentials
All reasons and checks

pmndrs/docsAuthor:Poimandres

Install

In your terminal, with SkillFoxx CLI

npx skillfoxx add mcp/pmndrs-docs

Detects the agents on your machine, shows the access level and pins the version.

Other ways to install

Access and checks

How we review

Minimal accessThe tool runs nothing and makes no network calls.

  • The server gives the agent public docs and examples read-only and asks for no credentials

This is third-party code. Review the repository files before installing.

What it does

pmndrs docs is an MDX documentation generator that builds docs.pmnd.rs. The same site serves its content to agents over MCP: one address, `https://docs.pmnd.rs/api/mcp`, uses Streamable HTTP and covers every library in the pmndrs ecosystem. The `llms-full.txt` file is too big to paste in whole. So an agent first reads a library index, the resource `docs://{lib}/index` with one line per page, and then requests the one page it needs with the tool `get_page_content`, passing `lib` and `path`. The resource `docs://pmndrs/manifest` lists the libraries served. The server also serves the examples gallery: the resource `examples://index` and the tool `get_example`, which returns an example's source, live URL, asset attribution and dependency versions. Libraries that publish `llms-full.txt` join through a pull request to the repository.

Who it is for. Developers on react-three-fiber, drei, zustand and jotai who ask an agent about the API or want a scene built from ready examples.

Good fit when

  • The agent invents props that drei does not have and needs the real documentation page
  • You want to know how a zustand hook works, for example with TypeScript
  • You need an example of an effect such as caustics or refraction with its source code
  • You want pmndrs docs in Claude Code through a single plugin
  • A library author wants agents to read their docs over MCP

Not a fit when

  • You need docs for libraries outside the pmndrs ecosystem: the server serves only those in its manifest
  • You need an exact signature reference for your version: examples pin their own dependency versions
  • You work offline: the server is remote

Example request

How do I use instances from drei in react-three-fiber? Fetch the docs page and show an example with a link to the source.

MCP

Transport
http
Authentication
not required

Limitations

The server serves only libraries listed in its manifest, and a library gets there by publishing `llms-full.txt` and being flagged in `src/app/page.tsx`. Pages are fetched at call time and revalidated every five minutes.

Each example pins its own dependency versions. For a current API signature the author advises checking the docs and not the example. An example suits a "how is it put together" question, and a docs page suits "what does the API take".

The server is remote, so an agent cannot reach it without a network. The plugin install works in Claude Code; for other clients take the JSON config from the site home page.

How to disable. Remove the server from the MCP client or disable the plugin with `/plugin uninstall pmndrs@pmndrs` in Claude Code. The service issues no keys.

FAQ

Does the server need a key?

No, it is open. The MCP registry lists it as a remote server with streamable-http transport and no environment variables.

Which libraries does it serve?

Every library badged MCP on docs.pmnd.rs, including react-three-fiber, drei, zustand and jotai. The current list is in the resource `docs://pmndrs/manifest`.

How do I connect it in Claude Code?

Through the plugin: `/plugin marketplace add pmndrs/claude-code-plugin`, then `/plugin install pmndrs@pmndrs`.

How is this better than llms.txt?

`llms-full.txt` is too big to paste into context. MCP lets the agent read the index and fetch only the page it needs.

How can I test the server before connecting?

Run `npx -y @modelcontextprotocol/inspector`, add the server manually with transport `streamable-http` and the address `https://docs.pmnd.rs/api/mcp`, and preview the react-three-fiber index.

Discussion

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README in short

The README covers the generator: reading docs with `npx @pmndrs/docs`, searching pages and building HTML or a static site. The agents section explains publishing `llms.txt`, the MCP server, the examples and how a new library joins.

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