MCP MeasureMCP Measure

index observed

Ferritin — Rust documentation

Search and read Rust documentation for the standard library and any crate on crates.io

Should I use this

Quality & Safety

A
Description quality
100%
Schema completeness
100%
Naming quality
100%
Poisoning risk
100%
Permission match
100%
Protocol compliance
100%

Based on automated analysis of tool definitions and protocol compliance.

Context Cost

~480Tokens (tool definitions)
~2.2 KBTypical response size
Minimal attention impact (0.38% of 128k context)

This is the approximate number of tokens consumed each time the server's tools are loaded into a model's context. Higher counts reduce the attention available for other tasks.

Install

One-Click Install

Add this to your `claude_desktop_config.json` file:

{
  "mcpServers": {
    "rustdoc": {
      "url": "https://ferritin.rs/mcp"
    }
  }
}

Remote endpoints

https://ferritin.rs/mcpstreamable-http

What it can do

Tool inventory

Tools (2)

🟢 Read-only🟡 Write🔴 Delete⚪ Unknown
🟢get(path)

Show documentation for a Rust item by path.

Input Schema

{
  "type": "object",
  "properties": {
    "path": {
      "description": "Item path, e.g. `serde::Deserialize` or `std::vec::Vec`. A crate segment\nmay carry an `@`-suffixed semver requirement (not an exact version):\n`tokio@1::runtime::Runtime` serves the newest 1.x, while `tokio@=1.40`\npins an exact release.",
      "type": "string"
    }
  },
  "required": [
    "path"
  ],
  "examples": [
    {
      "description": "Look up a trait",
      "path": "serde::Deserialize"
    }
  ]
}
🟢search(crate, query)

Search for items within a crate's documentation, or — without a crate — discover which crate to use.

Input Schema

{
  "type": "object",
  "properties": {
    "crate": {
      "description": "Crate to search within, optionally with an `@`-suffixed semver\nrequirement (not an exact version): `serde`, `tokio@1` (newest 1.x), or\n`tokio@=1.40` to pin an exact release.\n\n**Omit only to discover which crate to use.** With `crate`, the search\nruns over that crate's full documentation — item names and prose.\nWithout it, it searches a different, much shallower dataset: crates.io\ncrate names, descriptions, and declared keywords. It returns crates,\nnot items, and cannot see any crate's actual documentation. If you\nalready know the crate name, always pass it.",
      "type": "string"
    },
    "query": {
      "description": "Search query — one or more complete words. With `crate`, matched\nagainst item names and documentation prose; without it, against crate\nnames, descriptions, and declared keywords.",
      "type": "string"
    }
  },
  "required": [
    "query"
  ],
  "examples": [
    {
      "crate": "serde",
      "description": "Find deserialization items in serde",
      "query": "deserialize"
    },
    {
      "description": "Discover which crate to use for MQTT",
      "query": "mqtt client"
    }
  ]
}

Recommended Prompts

search_research
Search for information about [topic] using Ferritin — Rust documentation
Expected tools: search
find_specific
Find [specific item] using Ferritin — Rust documentation
Expected tools: search
retrieve_data
Get details about [item] from Ferritin — Rust documentation
Expected tools: get
fetch_info
Fetch [information type] using Ferritin — Rust documentation
Expected tools: get
research_workflow
Search for [topic], then get detailed information about the top results using Ferritin — Rust documentation
Expected tools: searchget

Community

Rate this Server

Evidence

Recent observations

verifiedversion not recorded2 tools
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