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X402search Mcp

x402-index/x402search-mcp

This connects your AI agent to a searchable index of 14,000+ x402-enabled HTTP APIs, all payable with USDC on Base. Each search costs $0.01 and runs against endpoints that support the x402 protocol for machine-to-machine payments. You get back structured results with endpoint URLs, pricing metadata, network info, and relevance scores. Use it when you need to discover blockchain, DeFi, or crypto APIs on the fly without manually hunting through docs or setting up individual API keys. It works with Claude Desktop, Cursor, Windsurf, and Python frameworks like LangChain. You'll need a wallet private key and a small USDC balance on Base mainnet to run queries.

GitHub stars
1
tool
1
auth
Secret needed
transport
STDIO
env var
1
last updated
Mar 8, 2026
View on GitHub

Tools

1 tools

Public tool metadata for what this MCP can expose to an agent.

search_x402_apisSearch 14,000+ x402-enabled HTTP APIs from any MCP-compatible agent.

Search 14,000+ x402-enabled HTTP APIs from any MCP-compatible agent.

No parameter schema in public metadata yet.

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Configuration

PRIVATE_KEY*secret

EVM private key for x402 payment signing

Readme

x402search MCP Server

Search 14,000+ x402-enabled HTTP APIs from any MCP-compatible agent.

Version: 1.0.3 · License: MIT · Cost: $0.01 USDC per search · Base mainnet · No account needed

npm: https://www.npmjs.com/package/x402search-mcp
PyPI: https://pypi.org/project/x402search-mcp
API: https://x402search.xyz

Requirements

Install: Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "x402search": {
      "command": "npx",
      "args": ["x402search-mcp@1.0.3"],
      "env": {
        "EVM_PRIVATE_KEY": "0xYOUR_PRIVATE_KEY_HERE"
      }
    }
  }
}

Config file location:

  • macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
  • Windows: %APPDATA%\Claude\claude_desktop_config.json

Install: Claude Code

claude mcp add x402search -- npx x402search-mcp@1.0.3

Then set your key:

export EVM_PRIVATE_KEY=0xYOUR_PRIVATE_KEY_HERE

View the full README on GitHub

Details

Repository
github.com/x402-index/x402search-mcp
Categories
AI & LLM Tools, Search & Web Crawling
Package
x402search-mcp
Transport
STDIO
Auth
Required
Registry
MCP registry, active

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