The Index9 MCP Server provides up-to-date information and live testing capabilities for 300+ AI models from OpenRouter, helping you discover, compare, and evaluate models with current pricing, specifications, and performance data.
Key Capabilities:
Search and Filter Models: Use natural language queries or specific filters (provider, context window, price, capabilities) to discover relevant models from 300+ options
Get Detailed Specifications: Retrieve comprehensive technical details including pricing (input/output per million tokens), context window limits, capabilities (vision, audio, tool_calling, JSON mode, video), architecture, and per-request limits
Live Model Testing: Execute actual API calls to 1-5 models simultaneously using preset scenarios (quick math, code generation, reasoning, instruction following, tool calling) or custom prompts, measuring output quality, latency, token usage, and costs
Semantic Search: Find models using natural language descriptions with relevance scoring that combines semantic similarity, capability matching, and quality signals
Cost Analysis: Access current pricing and estimate costs for model usage, including extended pricing for image processing, audio, web search, and caching
Compare Models Side-by-Side: View pricing, release dates, architecture details (tokenizer, instruct type), moderation status, and performance metrics
Capability Filtering: Filter models by specific capabilities using AND logic to find models meeting multiple requirements
Pagination and Sorting: Browse results with pagination support and sort by relevance, price, release date, or context window size
Stay Current: Access regularly updated model information, solving the problem of outdated AI assistant knowledge
Note: Live testing requires an OpenRouter API key for billing purposes.
Click on "Install Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type
@followed by the MCP server name and your instructions, e.g., "@Index9 MCP Serverfind models with 128k context under $0.50 per million tokens"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
@index9/mcp
Search, inspect, and benchmark 300+ AI models from your editor.
Install
Cursor / VS Code
Add to .cursor/mcp.json or .vscode/mcp.json:
{
"mcpServers": {
"index9": {
"command": "npx",
"args": ["-y", "@index9/mcp"]
}
}
}Claude Code
claude mcp add --transport stdio index9 -- npx -y @index9/mcpTools
Tool | Description | API Key |
| Search models by query, price, context window, or capabilities | No |
| Get pricing, limits, and capabilities for any model by ID or alias | No |
| Run your prompt across multiple models — compare outputs, latency, and cost | Optional |
test_model with dryRun=true estimates cost without inference (no key needed). Live tests require an OpenRouter API key:
{
"mcpServers": {
"index9": {
"command": "npx",
"args": ["-y", "@index9/mcp"],
"env": {
"OPENROUTER_API_KEY": "sk-..."
}
}
}
}Your key is passed per-request and never stored.
Links
index9.dev — full docs and examples
Resources
Unclaimed servers have limited discoverability.
Looking for Admin?
If you are the server author, to access and configure the admin panel.