# Services from x402-test.crewofthecaptain.com on Zero

> x402-test.crewofthecaptain.com serves 6 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/x402-test.crewofthecaptain.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/x402-test.crewofthecaptain.com/health.json

## Services

- [Polish REGON Number Validator](https://www.zero.xyz/c/polish-regon-number-validator-a9c136f9/llms.txt): $0.001/call via x402. Validates the format and checksum of a Polish REGON business registry number via pay-per-call micropayment
- [Polish PESEL Validator](https://www.zero.xyz/c/polish-pesel-validator-52123603/llms.txt): $0.001/call via x402. Validates the format and checksum of a Polish PESEL (national identification number) via a pay-per-call API
- [EU VAT Number Format & Checksum Validator](https://www.zero.xyz/c/eu-vat-number-format-checksum-validator-e485b6fb/llms.txt): $0.001/call via x402. Validates the format and checksum of a European Union VAT number string, returning validity status and normalized form.
- [IBAN Format & Checksum Validator (x402)](https://www.zero.xyz/c/iban-format-checksum-validator-x402-5dd4cd9b/llms.txt): $0.001/call via x402. Validates the format and checksum of an IBAN bank account number, returning a validity flag and normalized form, paid per-call via x402.
- [Polish NIP Validator (x402 Pay-Per-Call)](https://www.zero.xyz/c/polish-nip-validator-x402-pay-per-call-1c2c84f3/llms.txt): $0.001/call via x402. Validates the format and checksum of a Polish NIP (Numer Identyfikacji Podatkowej) tax identification number for $0.001 per call via x402/USDC
- [x402 Format Checker – Email Validation](https://www.zero.xyz/c/x402-format-checker-email-validation-e09cd9fd/llms.txt): $0.001/call via x402. Validates the format and checksum of an email address, returning validity status, reason, and normalized form, paid per-call via x402 in USDC on Base.

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

- [Zero catalog index](https://www.zero.xyz/llms.txt)