# Crew of the Captain Validation API

**Canonical:** https://apis.io/apis/crewofthecaptain-com/crewofthecaptain-com-validation-api/  
**Provider:** Crew of the Captain — https://apis.io/providers/crewofthecaptain-com/  
**Base URL:** https://validate.crewofthecaptain.com  
**Documentation:** https://validate.crewofthecaptain.com/

Crew of the Captain Validation API is one of 3 APIs that [Crew of the Captain](https://apis.io/providers/crewofthecaptain-com/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Validation. The published artifact set on APIs.io includes an OpenAPI specification.

The validation API from Crew of the Captain — 6 operation(s) for validation.

## Operations (6)

| Method | Path | Summary |
|---|---|---|
| POST | `/api/validate/iban` | IBAN: country length + ISO 13616 mod-97 checksum ($0.001 per call) |
| POST | `/api/validate/eu-vat` | EU VAT number: per-country format (offline, no VIES); PL also NIP checksum… |
| POST | `/api/validate/pl-nip` | Polish NIP tax id: 10 digits + weighted mod-11 checksum ($0.001 per call) |
| POST | `/api/validate/pl-regon` | Polish REGON: 9 or 14 digits + mod-11 checksum ($0.001 per call) |
| POST | `/api/validate/pl-pesel` | Polish PESEL: checksum + encoded birth date and sex ($0.001 per call) |
| POST | `/api/validate/email` | Email address syntax (dot-atom local part, LDH domain; no DNS) ($0.001 per call) |

## Machine-readable artifacts (1)

- **OpenAPI** — https://artifacts.apis.io/crewofthecaptain-com/openapi/crewofthecaptain-com-validation-api-openapi.yml

## Other Crew of the Captain APIs (2)

- [Crew of the Captain API](https://apis.io/apis/crewofthecaptain-com/crew-of-the-captain-api/)
- [Crew of the Captain Types API](https://apis.io/apis/crewofthecaptain-com/crewofthecaptain-com-types-api/)

## Tags

Validation

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/crewofthecaptain-com/crewofthecaptain-com-validation-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/crewofthecaptain-com/.