# Ferritin — Rust documentation

> Ferritin — Rust documentation, an MCP server by ferritin.rs, listed from the official MCP registry. Indexed, not reviewed: facts and our own checks, no score or ranking. Search and read Rust documentation for the standard library and any crate on crates.io

- Canonical: https://www.anchorterminal.com/tools/ferritin-rustdoc
- Markdown: https://www.anchorterminal.com/tools/ferritin-rustdoc.md (~550 tokens)
- Slim: https://www.anchorterminal.com/tools/ferritin-rustdoc.min.md (~480 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/tools/ferritin-rustdoc.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-05

# Ferritin — Rust documentation

> Indexed, not reviewed: facts from the official MCP registry and our own checks. No score, grade or rank, and not in the rankings until the panel reviews it. How the index works: https://www.anchorterminal.com/indexed/

- Kind: MCP server, by ferritin.rs (https://ferritin.rs)
- Listed because: It's published in the registry under ferritin.rs, a namespace the registry only gives to whoever proves they control that domain.
- What the official MCP registry says: Search and read Rust documentation for the standard library and any crate on crates.io

## Facts

- MCP registry: `rs.ferritin/rustdoc` 2026.7.21
- Endpoint: https://ferritin.rs/mcp (streamable HTTP)
- Source: https://github.com/jbr/ferritin
- Website: https://ferritin.rs
- GitHub stars: 37
- Registry entry updated: 2026-07-22

## Tools

- Tools it lists (2, about 484 tokens of context, `tools/list` without credentials over MCP 2026-07-28, checked 2026-10-04 22:25 UTC):
  - `get` (read-only): Show documentation for a Rust item by path.
  - `search` (read-only): Search for items within a crate's documentation, or — without a crate — discover which crate to use.
- How its tools read to an agent (0 errors, 0 warnings, 1 note, about 484 tokens; rules at https://www.anchorterminal.com/check.md; not part of the score):
  - note TC24 server: 2 of 2 tools have no outputSchema

- JSON: https://www.anchorterminal.com/api/v1/tools/ferritin-rustdoc.json
- Being indexed says nothing about quality, and nobody can pay for it. Ask for a review: https://www.anchorterminal.com/builders/#claiming