Czech National Bank
Currency Exchange
A collection of exchange rates
No keyCORSHTTPS
Frankfurter
Exchange rates, currency conversion and time series
Verified 4 days ago: 100% uptime
API key
Not required
HTTPS
Supported
Browser calls
Yes, CORS enabled
Status
Live · 100/100
What our checks found
- Health score
- 100/100
- Reliability
- 100%
- Average latency
- 1263ms
Last checked 2026-09-18. Measured independently, not self-reported by the provider.
How to call it
A starting template for Frankfurter. Replace ENDPOINT with the path from the official documentation, which we link above rather than guess at.
# No authentication required.
curl -s "https://www.frankfurter.app/ENDPOINT" \
-H "Accept: application/json"Where this listing comes from
Aggregated from 2 public sources (public-api-lists, public-apis), then normalised and checked by us. If something here is wrong, tell us and we will correct it.
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The exchangerate.dev API provides indicative foreign exchange rates for over 168 currency pairs, with live intraday updates for 16 currencies. It offers various endpoints for real-time currency conversion, historical rates, and detailed market information, making it ideal for developers needing accurate financial data.
No keyCORSHTTPS
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Frankfurter — common questions
Answered from what our own scheduled checks found, not from the provider's marketing.
Is Frankfurter free to use?
Frankfurter is listed in our free catalogue and required no credential when we called it. It needs no authentication at all, so you can send a request without signing up. Free tiers can still carry rate limits or non-commercial terms, so check the provider's own terms before shipping.
Does Frankfurter need an API key?
No. We called Frankfurter on 2026-09-18 with no key, no token and no Authorization header, and it responded. That is what puts it in our no-key collection.
Can I call Frankfurter from browser JavaScript?
Yes. Frankfurter returned CORS headers when we checked it, so a browser will let your page read the response. You can fetch it directly from client-side JavaScript with no proxy and no backend.
Is Frankfurter still working?
Yes, as of 2026-09-18. Our automated check reached Frankfurter and recorded a 100% reliability score with a median response time of 1263 ms. We re-check on a schedule, and this page updates with the result.
Is Frankfurter available over HTTPS?
Yes. Frankfurter serves over HTTPS, so you can call it from a secure page without triggering a mixed-content block.