shipapis
StarSubmit an APISubmit API

CongressInvests vs Frankfurter

Same instrument, two spec sheets — measured, not claimed.

APICongressInvestsNEW—FrankfurterHEALTHY—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedPublic data (ECB reference rates)
Free tierFree tier — key may be requiredUnlimited — abuse-rate-limited only
Rate limitUnpublishedUnpublished, generous
In directory since2026-07-052026-05-02
operationalpartialdownno data

CongressInvests vs Frankfurter: common questions

Which is more reliable, CongressInvests or Frankfurter?

On our scheduled checks, Frankfurter leads on measured uptime — CongressInvests at —% versus Frankfurter at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do CongressInvests and Frankfurter need an API key?

Frankfurter needs no key, while CongressInvests requires a free API key. If you want to start calling without signup, reach for Frankfurter first.

Can I call CongressInvests and Frankfurter from the browser?

Yes — both CongressInvests and Frankfurter send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are CongressInvests and Frankfurter free for commercial use?

CongressInvests has unclear commercial terms, and Frankfurter allows commercial use on its free tier. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.