Currency Exchange · head-to-head
National Bank of Poland vs VATComply.com
The National Bank of Poland's Web API exposes the official mid-market currency reference rates it publishes daily across three rate tables, plus historical gold-price fixings dating back to January 2013 — all queryable by date, currency code, or table series via plain HTTP GET. Responses come back in JSON or XML depending on a format parameter, though historical range queries are capped at 93 days per request. The bank retired plain HTTP in August 2025 in favor of HTTPS-only access.
VATcomply bundles several EU compliance primitives behind one free, keyless API: VIES-backed VAT number validation, current VAT rates for all 27 EU member states, daily ECB foreign-exchange reference rates with history back to January 1999, IP-based geolocation, and IBAN validation. Rather than gating access behind an API key, it simply rate-limits anonymous callers, and it ships both narrative documentation on its homepage and a full interactive OpenAPI reference at a separate endpoint.
| National Bank of Poland | VATComply.com | |
|---|---|---|
| Authentication | None | None |
| Pricing | free | free |
| Formats | JSON, XML | JSON |
| CORS | yes | yes |
| HTTPS | Yes | Yes |
National Bank of Poland supports 2 response formats, while VATComply.com offers fewer — pick National Bank of Poland for more integration flexibility.