x402 Format Checker
IBAN, EU VAT, NIP, REGON, PESEL, email checks. Only $0.001 (0.1 cent) per check via x402 on Base
likely compatible
Answered an MCP initialize with no credentials; use auth 'None'.
Rule R2a · what this means · Not tested in Copilot Studio.
| Registry name | com.crewofthecaptain/format-checker |
| Endpoint used for verdict | https://validate.crewofthecaptain.com/mcp |
| Transports | streamable-http |
| Auth (Copilot Studio setting) | None (open) |
| Last endpoint check | 2026-10-20T18:11:00Z · initialize OK |
| Website | https://validate.crewofthecaptain.com/ |
| Version | 1.3.0 |
| Registry updated | 2026-10-11 |
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Is this wrong or out of date? Email us. Data built 2026-10-20.