Currency Exchange · head-to-head
Currency-api vs National Bank of Poland
This free, no-key currency API covers 200+ fiat currencies plus common cryptocurrencies and metals, served off jsDelivr's CDN with a Cloudflare Pages fallback and refreshed daily via GitHub Actions — there's no rate limit because there's no backend server to overload. The original fawazahmed0/currency-api repository has been migrated to fawazahmed0/exchange-api as its new home, though the CDN-hosted JSON endpoints (addressable by date or "latest") work exactly the same way for existing integrators.
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.
| Currency-api | National Bank of Poland | |
|---|---|---|
| Authentication | None | None |
| Pricing | free | free |
| Formats | JSON | JSON, XML |
| CORS | yes | yes |
| HTTPS | Yes | Yes |
National Bank of Poland supports 2 response formats, while Currency-api offers fewer — pick National Bank of Poland for more integration flexibility.