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HEAD-TO-HEAD COMPARISON

Exchange Rates API vs Frankfurter: Free Currency Exchange Rate APIs

Zero-auth open-source European Central Bank tracker Frankfurter compared with commercial Exchange Rates API free tier.

Technical Specifications Matrix

FeatureExchange Rates APIFrankfurter
AuthenticationFree Key RequiredNo Key (Zero-Auth)
Rate Limit (Free Tier)250 req/monthUnlimited
CORS & SecurityHTTPS • CORS EnabledHTTPS • CORS Enabled
CategoryFinans ve BorsaFinans ve Borsa
Official WebsiteVisit DocsVisit Docs
FreeAPI Service PageExchange Rates API PageFrankfurter Page

Key Engineering Takeaways & Differences

Frankfurter requires zero registration or API key; tracks European Central Bank published rates.
Exchange Rates API covers 160+ fiat currencies and multiple crypto-fiat pairs.
Frankfurter provides clean, lightweight time-series and historical currency conversions.
Exchange Rates API offers commercial SLA tiers and global multi-source aggregation.

Category Winner Recommendation

Zero RegistrationFrankfurter
Currency CoverageExchange Rates API
Historical Time SeriesFrankfurter
Open Source ModelFrankfurter