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IBAN, EU VAT, NIP, REGON, PESEL, email checks. Only $0.001 (0.1 cent) per check via x402 on Base
npx @getmcp/cli add com.crewofthecaptain/format-checkerRequires Node.js 18+. Community-contributed server. Review source before installing.
Config file: ~/Library/Application Support/Claude/claude_desktop_config.json
{
"mcpServers": {
"com.crewofthecaptain/format-checker": {
"url": "https://validate.crewofthecaptain.com/mcp",
"transport": "streamable-http"
}
}
}