Repo Radar MCP

Discover, rank and compare GitHub repositories from any MCP-compatible AI client.

Repo Radar MCP is a Python-based MCP server that connects AI agents to the GitHub API, allowing them to search, filter, rank and evaluate open-source repositories by topic, language, stars, license, activity and relevance.

It is designed for developers, builders and AI agents that need a structured way to research open-source projects.

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Why Repo Radar MCP?

AI agents can write code, but they also need good technical context.

Repo Radar MCP gives your MCP-compatible client a simple set of tools to answer questions like:

• What are the most popular Python repositories about RAG?
• Which MCP servers are worth studying?
• What GitHub projects are active, licensed and useful?
• Which repository should I use as a reference for my next project?
• How do several repositories compare by stars, forks, issues, license and recent activity?

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Features

• Search GitHub repositories by topic.
• Filter by programming language.
• Filter by minimum stars.
• Rank repositories with a simple usefulness score.
• Analyze a single repository.
• Compare multiple repositories.
• Fetch repository README content.
• Return results as JSON or Markdown.
• Uses your GitHub token safely from environment variables.
• Works with MCP Inspector, Claude Desktop, Cursor and other MCP-compatible clients.

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MCP Tools

Tool	Description
search_repositories	Search GitHub repositories by topic, language, stars and sorting mode.
search_repositories_markdown	Same as above, but returns a clean Markdown report.
rank_repositories	Search repositories and add a practical repository score.
rank_repositories_markdown	Search, rank and return repositories as Markdown.
analyze_repository	Analyze one repository by owner/name.
analyze_repository_markdown	Analyze one repository and return a Markdown report.
compare_repositories	Compare several repositories by owner/name.
compare_repositories_markdown	Compare several repositories and return a Markdown table.
get_repository_readme	Fetch the README of a repository.

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Installation

Clone the repository:

git clone https://github.com/javiermorron/repo-radar-mcp.git
cd repo-radar-mcp

Create and activate a virtual environment.

Windows PowerShell

python -m venv .venv
.\.venv\Scripts\activate

macOS / Linux

python -m venv .venv
source .venv/bin/activate

Install the project:

pip install -e .

Copy the environment file:

cp .env.example .env

On Windows PowerShell:

copy .env.example .env

Edit .env and add your GitHub token:

GITHUB_TOKEN=your_github_token_here
GITHUB_API_VERSION=2022-11-28
GITHUB_USER_AGENT=repo-radar-mcp/1.0.0

Never commit your real .env file.

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Run with MCP Inspector

From the project root:

mcp dev server.py

If the Inspector does not find uv, use this configuration in the Inspector:

Transport Type: STDIO
Command: python
Arguments: server.py

Then open the Tools tab and run:

{
  "topic": "mcp server",
  "language": "Python",
  "limit": 5,
  "min_stars": 10
}

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Claude Desktop Example

A sample configuration is available in:

examples/claude_desktop_config.example.json

Example Windows entry:

{
  "mcpServers": {
    "repo-radar-mcp": {
      "command": "C:\\Users\\YOUR_USER\\repo-radar-mcp\\.venv\\Scripts\\python.exe",
      "args": [
        "C:\\Users\\YOUR_USER\\repo-radar-mcp\\server.py"
      ]
    }
  }
}

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Example Prompts

Search the 5 most popular Python repositories about "mcp server" and explain which one is best to study.

Compare these repositories: modelcontextprotocol/python-sdk, langchain-ai/langchain, run-llama/llama_index.

Find popular repositories about "rag assistant" in Python with more than 500 stars and rank them by usefulness.

Analyze microsoft/autogen and tell me if it is active, useful and worth studying.

More prompts are available in:

examples/prompts.md

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Repository Score

Repo Radar MCP includes a simple scoring system based on:

• Stars
• Forks
• Recent activity
• License availability
• Open issues
• Archived status

The score is not meant to replace human judgment. It is a quick signal to help agents and developers prioritize what to inspect first.

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Project Structure

repo-radar-mcp/
|-- src/
|   |-- repo_radar_mcp/
|   |   |-- __init__.py
|   |   |-- server.py
|   |   |-- github_client.py
|   |   |-- scoring.py
|   |   |-- formatters.py
|   |   |-- models.py
|-- examples/
|   |-- claude_desktop_config.example.json
|   |-- prompts.md
|-- tests/
|   |-- test_scoring.py
|-- .env.example
|-- .gitignore
|-- LICENSE
|-- README.md
|-- CHANGELOG.md
|-- requirements.txt
|-- pyproject.toml
|-- server.py

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Roadmap

• Add repository release analysis.
• Add issue quality analysis.
• Add contributor activity metrics.
• Add support for GitHub topics recommendations.
• Add repository health report.
• Add CSV and JSON export helpers.
• Add Docker support.
• Add GitHub Actions for tests and linting.

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Security

Repo Radar MCP uses a GitHub token from environment variables.

Do not commit:

• .env
• Personal access tokens
• Private API keys
• Local virtual environments

The .gitignore file already excludes common sensitive and generated files.

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Contributing

Contributions are welcome.

Good first issues:

• Improve scoring logic.
• Add more output formats.
• Add tests.
• Improve MCP client examples.
• Add Docker support.

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License

This project is licensed under the MIT License.

Created by Javier Morrón. Connect with me on LinkedIn: https://www.linkedin.com/in/javiermorron.