OpenRouter Model Selector

OpenRouter Model Selector is a Model Context Protocol (MCP) server that helps AI assistants automatically find, filter, and rank the best AI models for a specific task using the OpenRouter API.

Whether you need a model for coding, image generation, text-to-speech (TTS), or transcription (STT), this tool queries the live OpenRouter directory, groups them by your requested modality, and ranks the top 10 models based on:

1. Price (1 to 5 stars - 5 stars being the most expensive).
2. Benchmark / Performance (1 to 5 stars based on intelligence index or Elo rating).

Features

• Zero Configuration: No API keys required. It uses OpenRouter's public /api/v1/models endpoint.
• Smart Modality Routing: Understands keywords to correctly filter for image-understanding, video-understanding, transcription, speech, image-generation, and video-generation.
• Dynamic Pricing Calculation: Accurately compares prompt/completion/image output prices to give a relative cost score.
• FastMCP Built: Built on top of fastmcp for quick integration with MCP-compatible clients like Claude Desktop, Cursor, or Google Antigravity.

Installation

1. Clone this repository:

git clone https://github.com/your-username/openrouter-model-selector-mcp.git
cd openrouter-model-selector-mcp

2. Create a virtual environment and install dependencies:

python3 -m venv .venv
source .venv/bin/activate
pip install -r requirements.txt

Usage & Configuration

To use this with any MCP-compatible AI assistant, you need to add it to your MCP configuration file (e.g., mcp.json or claude_desktop_config.json).

Here is an example configuration:

{
  "mcpServers": {
    "openrouter-model-selector": {
      "command": "/absolute/path/to/your/cloned/repo/.venv/bin/python",
      "args": [
        "/absolute/path/to/your/cloned/repo/openrouter_agent_selector.py"
      ]
    }
  }
}

Make sure to replace /absolute/path/to/your/cloned/repo/ with the actual path on your machine.

How it works

When connected, your AI assistant will have access to a tool called select_best_agent. If you ask your AI: "Find me an AI model for text to speech", it will call this tool with topic="text to speech", fetch the relevant models, and present you with a Markdown-formatted list containing the stars for Price and Benchmark.

Security & Privacy

This tool does not require or transmit any private API keys. It only reads public model catalog data from OpenRouter.

License

MIT License