Currency Exchange · head-to-head
Czech National Bank vs Exchangerate.dev
The Czech National Bank publishes its official daily fixing of the koruna against roughly 30 foreign currencies, sourced from interbank market quotes and released every working day around 14:30 CET (weekends and holidays carry over the last valid fixing). Beyond the legacy raw XML feed this entry links to, CNB also runs a modern JSON REST API with interactive Swagger documentation and date-parameterized historical queries — and, like the old feed, it requires no key or registration.
Exchangerate.dev is a lean, Frankfurter-compatible FX endpoint aimed at fintech apps, trading tools, and AI agents that want genuinely intraday pricing rather than a once-daily fix: its supported currencies refresh roughly every 60 seconds through the trading week, and every quote is tagged with its source and timestamp so callers can tell a live tick from a stale daily rate. It requires no API key or card to start, positioning itself as a near drop-in replacement for Frankfurter's response shape for teams that need faster-moving data.
| Czech National Bank | Exchangerate.dev | |
|---|---|---|
| Authentication | None | None |
| Pricing | free | free |
| Formats | XML, JSON | JSON |
| CORS | unknown | unknown |
| HTTPS | Yes | Yes |
Czech National Bank supports 2 response formats, while Exchangerate.dev offers fewer — pick Czech National Bank for more integration flexibility.