From the README

# 402 Index MCP Server

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

The [402 Index](https://402index.io) 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.

## Quick Start

```bash
npx @402index/mcp-server
```

## Installation

### Claude Desktop

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

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

### Claude Code

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

### Cursor

Add to `.cursor/mcp.json`:

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

## Tools

| Tool | Description |
|------|-------------|
| `search_services` | Search 15,000+ paid APIs by keyword,