x402 Format Checker MCP Server: Install & Setup

Install x402 Format Checker in Claude Code

Claude Code

claude mcp add --transport http x402-format-checker https://validate.crewofthecaptain.com/mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "x402-format-checker": {
      "url": "https://validate.crewofthecaptain.com/mcp"
    }
  }
}

IBAN, EU VAT, NIP, REGON, PESEL, email checks. Only $0.001 (0.1 cent) per check via x402 on Base

Probably not entirely. The listing mentions pay-per-call, credits or a subscription. Check the provider for current pricing.

Remote. Hosted by the provider. You connect with a URL, nothing to install.

Run: claude mcp add --transport http x402-format-checker https://validate.crewofthecaptain.com/mcp

dlrjsdl200-byte/x402-gas-api

Compare live gas across up to 9 EVM chains and get the cheapest one. x402 pay-per-call on Base.

praneeth12098/x402-factory-clients

200+ x402 paid data APIs for AI agents: prediction markets, verified weather, econ, SEC filings

xyz.x402helper/mcp

API discovery and x402 paid execution via MCP. Search by natural-language, call with USDC payment

scrape402/x402-examples

Pay-per-call agent tools via x402 (USDC on Base): chat, prices, funding, RNG. No account or keys.

dev.workers.xbtbot.x402-reader/markdown-reader

Turn any public web page into clean Markdown. Pay-per-call via x402: 0.005 USDC on Base.

digitalweb33333-creator/x402-endpoints

x402 paid API tools for AI agents on Base: EU/global registries, crypto, wallet & agent trust.