402 Index

Verified Integration

Author: @keywords•Category: ServerApplication

GitHub Repository

JSON-RPC 2.0

Protocol Standard

Sub-second

Execution Latency

Active

Operational Status

Client Configuration

— Connect 402 Index to Claude Desktop or Cursor in seconds

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

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows).

Architecture & Capabilities

System Overview

Enables AI agents to search and evaluate over 15,000 paid API endpoints across L402, x402, and MPP protocols with real-time health monitoring.

Indexed Date

7/21/2026

License

Open Source

Protocol Layer

stdio / SSE RPC

Frequently Asked Questions

Architecture and operational details for 402 Index

The 402 Index is the world's largest directory, listing over 15,000 paid API endpoints across L402, x402, and MPP protocols, specifically designed for AI agents to discover, evaluate, and monitor APIs.

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