Czech National Bank
Currency Exchange
A collection of exchange rates
No keyCORSHTTPS
ExchangeRate-API
Free currency conversion
Verified 4 days ago: 100% uptime
API key
Required
HTTPS
Supported
Browser calls
No, needs a proxy
Status
Live · 100/100
What our checks found
- Health score
- 100/100
- Reliability
- 100%
- Average latency
- 255ms
Last checked 2026-09-18. Measured independently, not self-reported by the provider.
How to call it
A starting template for ExchangeRate-API. Replace ENDPOINT with the path from the official documentation, which we link above rather than guess at.
# Requires an API key. Check the docs for whether it goes in a header or a query parameter.
curl -s "https://www.exchangerate-api.com/ENDPOINT" \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Accept: application/json"This API does not send CORS headers, so a browser will block a direct call from your front end. Call it from your server, or put a small proxy in front of it.
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.
Other Currency Exchange APIs
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paralelo.bo
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Bolivia parallel-market USD/BOB exchange rate, aggregated from P2P sources every 60s
No keyCORSHTTPS
Exchangerate.dev
Currency Exchange
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
Bank of Russia
Currency Exchange
Exchange rates and currency conversion
No keyHTTPS
Cambio Uruguay
Currency Exchange
Real-time buy/sell rates from every Uruguayan exchange house with conversion and history
No keyHTTPS
ExchangeRate-API — common questions
Answered from what our own scheduled checks found, not from the provider's marketing.
Is ExchangeRate-API free to use?
ExchangeRate-API is listed in our free catalogue, but it requires an API key, so you will need to register before your first call. Providers frequently reserve higher limits and commercial use for paid plans.
Does ExchangeRate-API need an API key?
Yes. ExchangeRate-API authenticates with an API key. Keep it server-side rather than in browser code, because anything in your frontend bundle is readable by anyone who opens developer tools.
Can I call ExchangeRate-API from browser JavaScript?
Not directly. ExchangeRate-API did not return CORS headers when we checked, so the browser will block your page from reading the response even though the request itself succeeds. Call it from a server, or put a small proxy in front of it.
Is ExchangeRate-API still working?
Yes, as of 2026-09-18. Our automated check reached ExchangeRate-API and recorded a 100% reliability score with a median response time of 255 ms. We re-check on a schedule, and this page updates with the result.
Is ExchangeRate-API available over HTTPS?
Yes. ExchangeRate-API serves over HTTPS, so you can call it from a secure page without triggering a mixed-content block.