Currency Exchange — entry 002 of 18
Exchangerate.host
Exchangerate.host serves real-time and end-of-day historical forex rates alongside cryptocurrency exchange rates, with dedicated endpoints for point-in-time conversion and time-series lookups across roughly 168 currencies. It is now an APILayer product and requires a free API key at every tier, including the lowest usage bracket. Overage billing kicks in once a plan's monthly request allotment is exceeded.
AuthenticationAPI KeySign up with the provider to obtain credentials.
HTTPSSupportedTraffic is encrypted in transit.
CORSEnabledCallable directly from browser JavaScript.
PricingFreemiumA usable free tier exists, with paid plans for more volume.
FormatsJSONResponses can be requested as JSON.
GreatAPIs Score
Score75
Authentication15/25API key required
Pricing17/20Freemium tier available
Docs14/20Documentation URL provided
Formats9/15Single response format
Freshness20/20Verified within 6 months
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<a href="https://greatapis.com/api/exchangerate-host/"><img src="https://greatapis.com/badge/exchangerate-host.svg" alt="Scored 75 on greatapis.com"></a>Auth quickstart
- Sign up with the provider to get an API key.
- Send it on every request as a header
Authorization: <key> - The exact header isn't documented — Authorization is a common default; confirm in the provider's docs.
Stored keyNo key stored
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.