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codeitall

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Behavioral oracle for Rust crate APIs: runtime behavior, yank/advisory, deprecation, sig search

Source code Website Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http codeitall 'https://api.codeitall.dev/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "codeitall": {
            "type": "http",
            "url": "https://api.codeitall.dev/mcp"
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. codeitall — Rust API behavioral oracle
  2. What it answers
  3. Tools
  4. Determinism contract
  5. Quickstart
  6. Access modes
  7. Docs in this repo
  8. Cost & limits

codeitall — Rust API behavioral oracle

Version-pinned behavioral oracle for Rust package APIs, built for AI coding agents. Five deterministic tools backed by a Postgres substrate of 66,549,370 pattern_records and 107 successful probe runs across 7 task families (datetime, duration, base64, JSON strict-vs-permissive, JWT verify, AEAD encrypt/decrypt, constant-time compare).

Hosted, free, no signup: https://api.codeitall.dev

This repository is codeitall's public surface — the API reference, OpenAPI spec, the "For AI Agents" page, and the per-family pages. The ingest/indexer and server source are not redistributed; you consume codeitall by querying the hosted API, not by running it yourself.

What it answers

The differentiator from a docs RAG: the substrate captures runtime behavior (what a function actually does on a canonical input set, observed empirically), not just documentation (what it claims to do). It targets the documentation-vs-runtime gap — yank status, RustSec advisories, deprecation renames, and cross-implementation behavior tables.

Tools

ToolUse it for
answer_api_questionOpen-ended Rust API questions; routes deterministically (rule-based, no LLM) and falls back to bge-m3 cosine retrieval.
signature_searchYou know the signature shape (fn(&str) -> Result<Vec<u8>, _>); get ranked candidate functions + crate, downloads, yank status.
behavior_lookupA specific (crate, fn_name); get the probe-observation table verbatim — each row `(input, outcome=ok\err\panic, value_or_error)`.
compare_implementationsA task category (e.g. "base64 crates"); get the side-by-side cross-implementation behavior table.
find_modern_equivalentA suspected-deprecated call; get the current canonical alternative + yank/advisory rows.

Determinism contract

No generative LLM sits between a request and its response. Every response is SQL + deterministic templating; the only model in the hot path is bge-m3, a deterministic text→vector embedder used for the cosine fallback (same input → same vector → same hits). This is a regression-pinned invariant.

Quickstart

# Mint a free anonymous key (no email, no signup):
curl -sX POST https://api.codeitall.dev/v1/keys \
  -H 'content-type: application/json' -d '{}'

# Ask a question (HTTP REST):
curl -sX POST https://api.codeitall.dev/v1/answer_api_question \
  -H 'content-type: application/json' \
  -d '{"question":"how do I parse a duration string in rust"}'

GET aliases exist for every tool (browse-only clients); signature_search also accepts a shape_b64 (base64url) parameter so URL re-encoding can't mangle type-signature characters.

Access modes

  • MCP — SSE/HTTP at https://api.codeitall.dev/mcp (Bearer key), or stdio for self-hosters.
  • HTTP REST — POST/GET /v1/<tool>.
  • OpenAPI 3.1 — openapi.json (live: https://api.codeitall.dev/openapi.json).

Docs in this repo

Cost & limits

Free. Per-IP key issuance cap (10/day) and per-key quota (10,000/day). No paid tier, no email capture, no signup.

Frequently asked questions

What is codeitall?

Behavioral oracle for Rust crate APIs: runtime behavior, yank/advisory, deprecation, sig search

How do I install codeitall?

It runs as a remote server. In Claude Code: claude mcp add --transport http codeitall 'https://api.codeitall.dev/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does codeitall need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is codeitall open source?

Its code is public on GitHub, but the repository does not declare a standard license.

Who maintains codeitall?

It is published by codeitalldev. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.