    servers/
        communication/
        x402-format-checker
  

XF

x402 Format Checker

Unverified Claim & verify → Communication

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

Visit website ↗ Try Remote Server

Overview Installation

Overview

x402 Format Checker is an MCP server that validates financial and personal identifiers across Europe. It performs checks on IBANs, EU VAT numbers, Polish NIP and REGON codes, PESEL records, and email addresses. Processing happens remotely through the x402 service on Base, charged at $0.001 per check.

The server runs as a hosted endpoint at https://validate.crewofthecaptain.com/mcp with no authentication required and no local installation needed. Version 1.3.0 is the current release. You can integrate it immediately by pointing any MCP-compatible client to the endpoint.

x402 Format Checker is listed in the Communication category on mcp.site. It works with Claude Desktop, Claude Code, Cursor, VS Code, and other MCP clients. If you maintain this server, claim your listing to verify ownership and keep information up to date.

▸Hosted endpoint — Streamable HTTP · https://validate.crewofthecaptain.com/mcp

Installation

Settings → Connectors → Add custom connector
Name: x402 Format Checker
URL:  https://validate.crewofthecaptain.com/mcp

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