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Preflight Checks (x402)

MCP server · by josediegorobles

Web APIs Streamable HTTP v0.4.0

Deterministic pre-execution verification tools for AI agents with x402 USDC pay-per-call on Base

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Install

Run one of the commands below, then add the client config underneath.

Streamable HTTPhttps://preflight-checks--jd-robles.run.tools

Client configuration

Paste into Claude Desktop, Cursor (mcp.json), VS Code or any MCP client, then restart the client.

mcpServers{
  "mcpServers": {
    "preflight-checks": {
      "url": "https://preflight-checks--jd-robles.run.tools"
    }
  }
}

About this server

Preflight Checks (x402) is listed in the Web APIs category of the MCPNav directory. It is distributed as Streamable HTTP and can be loaded by any client that speaks the Model Context Protocol.

Typical uses include giving your assistant scoped access to the corresponding service so it can answer questions and take actions with real data instead of guessing. Always review what a server can access before you enable it — see our MCP security guide.

Frequently asked questions

What is the Preflight Checks (x402) MCP server?

Preflight Checks (x402) is an MCP server by josediegorobles. Deterministic pre-execution verification tools for AI agents with x402 USDC pay-per-call on Base

How do I install Preflight Checks (x402)?

Install it with: https://preflight-checks--jd-robles.run.tools. Then add the JSON config to your client's MCP settings and restart the client.

Is Preflight Checks (x402) free to use?

The MCP server itself is free to install. The source is public on https://github.com/josediegorobles/preflight-x402. Any third-party API it calls (such as a search or maps API) may require its own key and billing.

Which clients support Preflight Checks (x402)?

Any MCP-compatible client can use it, including Claude Desktop, Cursor, VS Code, Windsurf and custom agents.