RepoCrunch

Analyze any public GitHub repository into structured JSON. No AI, no LLMs — fully deterministic.

Give it a repo, get back tech stack, dependencies, architecture, health metrics, and security signals in clean, consistent JSON. Use it as a Python library, CLI tool, REST API, or MCP server.

Quick Start

Requires Python 3.11+.

pip install repocrunch
repocrunch analyze fastapi/fastapi --pretty

That's it. Also works with uv:

uvx repocrunch analyze astral-sh/uv --pretty

Install from source

git clone https://github.com/kimwwk/repocrunch.git
cd repocrunch
uv venv && uv pip install -e ".[all]"

Install just what you need:

uv pip install -e "."          # Library only (httpx + pydantic)
uv pip install -e ".[cli]"     # + CLI
uv pip install -e ".[api]"     # + REST API
uv pip install -e ".[mcp]"     # + MCP server
uv pip install -e ".[all]"     # Everything

Set a GitHub Token (optional)

Without a token you get 60 API calls/hour. With one, 5,000/hour.

export GITHUB_TOKEN=ghp_...

Usage

CLI

repocrunch analyze fastapi/fastapi --pretty          # Full analysis, pretty JSON
repocrunch analyze facebook/react -f tech_stack       # Single field
repocrunch analyze https://github.com/gin-gonic/gin   # Full URL works too
repocrunch serve                                       # Start REST API on :8000
repocrunch mcp                                         # Start MCP server (STDIO)

Python Library

from repocrunch import analyze, analyze_sync

# Async
result = await analyze("fastapi/fastapi")

# Sync
result = analyze_sync("pallets/flask")

print(result.summary.stars)
print(result.tech_stack.framework)
print(result.model_dump_json(indent=2))

REST API

repocrunch serve

# Then:
curl "http://localhost:8000/analyze?repo=fastapi/fastapi" | python -m json.tool
curl "http://localhost:8000/health"
curl "http://localhost:8000/docs"    # OpenAPI docs

MCP Server (for Claude, Cursor, etc.)

repocrunch mcp    # Starts STDIO transport

Sample Output

$ repocrunch analyze pallets/flask --pretty

{
  "schema_version": "1",
  "repo": "pallets/flask",
  "url": "https://github.com/pallets/flask",
  "analyzed_at": "2026-02-08T19:07:31Z",
  "summary": {
    "stars": 71143,
    "forks": 16697,
    "watchers": 2092,
    "last_commit": "2026-02-06T21:23:01Z",
    "age_days": 5787,
    "license": "BSD-3-Clause",
    "primary_language": "Python",
    "languages": { "Python": 99.9, "HTML": 0.1 }
  },
  "tech_stack": {
    "runtime": "Python",
    "framework": null,
    "package_manager": "pip",
    "dependencies": { "direct": 6, "dev": 0 },
    "key_deps": ["blinker", "click", "itsdangerous", "jinja2", "markupsafe", "werkzeug"]
  },
  "architecture": {
    "monorepo": false,
    "docker": false,
    "ci_cd": ["GitHub Actions"],
    "test_framework": "pytest",
    "has_tests": true
  },
  "health": {
    "open_issues": 2,
    "open_prs": 0,
    "contributors": 862,
    "commit_frequency": "daily",
    "maintenance_status": "actively_maintained"
  },
  "security": {
    "has_env_file": false,
    "dependabot_enabled": false,
    "branch_protection": false,
    "security_policy": false
  },
  "warnings": [
    "Branch protection status unknown (requires admin access or authenticated request)"
  ]
}

Supported Ecosystems

Language	Manifest Files	Package Manager Detection
JavaScript / TypeScript	package.json	npm, yarn, pnpm, bun (from lockfiles)
Python	pyproject.toml, requirements.txt	pip, poetry, uv, pdm, pipenv
Rust	Cargo.toml	cargo
Go	go.mod	go
Java / Kotlin	pom.xml, build.gradle, build.gradle.kts	maven, gradle
Ruby	Gemfile	bundler
C / C++	CMakeLists.txt	cmake

Framework detection covers 40+ frameworks across all supported ecosystems (FastAPI, Django, React, Next.js, Spring Boot, Rails, Gin, Actix, and many more).

What It Detects

Category	Signals
Summary	Stars, forks, watchers, age, license, languages
Tech Stack	Runtime, framework, package manager, direct/dev dependency count, key deps
Architecture	Monorepo, Docker, CI/CD platform, test framework
Health	Commit frequency (daily/weekly/monthly/sporadic/inactive), maintenance status, contributors, open issues
Security	.env file committed, Dependabot enabled, branch protection, SECURITY.md present

Roadmap

Not yet implemented, but planned:

• Secrets regex scanning — detect leaked API keys, tokens, passwords in the file tree
• Architecture type classification — library vs. application vs. framework
• API rate limiting — per-key throttling for the REST API
• Private repo support — authenticated analysis of private repositories
• npm/npx package — npx repocrunch analyze owner/repo
• Vulnerability scanning — known CVE detection in dependencies
• Comparison mode — side-by-side analysis of multiple repos
• Historical tracking — track how a repo's health changes over time
• PyPI / npm publishing — pip install repocrunch / npm install repocrunch
• Platform deployments — Apify Store, Smithery, mcp.so, RapidAPI

License

MIT