402index-mcp-server

> Search 15,000+ paid API endpoints across L402, x402, and MPP protocols with real-time health monitoring.

The 402 Index is the world's largest directory of paid API endpoints for AI agents. This MCP server gives your agent access to search, filter, and evaluate paid APIs before spending money.

npx @402index/mcp-server

Add to ~/Library/Application Support/Claude/claude_desktop_config.json:

{
  "mcpServers": {
    "402index": {
      "command": "npx",
      "args": ["@402index/mcp-server"]
    }
  }
}

claude mcp add 402index -- npx @402index/mcp-server

Add to .cursor/mcp.json:

{
  "mcpServers": {
    "402index": {
      "command": "npx",
      "args": ["@402index/mcp-server"]
    }
  }
}

| Tool | Description | |------|-------------| | search_services | Search 15,000+ paid APIs by keyword, protocol (L402/x402/MPP), category, health status, price, and more | | get_service_detail | Full details for a service including health history, latency, pricing, and payment verification | | list_categories | Browse all API categories with per-protocol endpoint counts | | get_directory_stats | Directory-wide health stats, protocol breakdown, and sync timestamps |

• L402 (Lightning) — Self-custodial Bitcoin micropayments. 477 endpoints from providers like mutinynet faucet, sats4ai, LightningEnable.
• x402 (Coinbase/Solana) — USDC stablecoin payments on Base/Solana. 14,478 endpoints from Bazaar, Satring, Sponge.
• MPP (Stripe/Tempo) — Fiat-native machine payments. 488 endpoints from OpenAI, Anthropic, Google Gemini, Firecrawl, Replicate.

Every endpoint is health-checked hourly with latency measurements and reliability scoring.

• "Find healthy L402 APIs for weather data under $0.01"
• "What paid inference APIs are