x402 Precheck

Connect Remote server

claude mcp add --transport http precheck https://x402-precheck.w0arvg81zlgf.workers.dev/mcp

{
  "mcpServers": {
    "precheck": {
      "url": "https://x402-precheck.w0arvg81zlgf.workers.dev/mcp"
    }
  }
}

{
  "servers": {
    "precheck": {
      "type": "http",
      "url": "https://x402-precheck.w0arvg81zlgf.workers.dev/mcp"
    }
  }
}

Settings > Connectors > Add custom connector
URL: https://x402-precheck.w0arvg81zlgf.workers.dev/mcp

Tools 1 found in our last check

• x402_precheck

  Check an x402 payment challenge BEFORE your agent pays (0.002 USDC per check via x402; free trial 1024 checks/IP/UTC day). Give an endpoint URL (fetched unpaid, never paid) or paste a 402 challenge. Validates x402 version, scheme, network (CAIP-2, testnet flag), canonical USDC a…

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