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CongressInvests vs ExchangeRate-API (open)

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

APICongressInvestsNEW—ExchangeRate-API (open)NEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — key may be requiredFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

CongressInvests vs ExchangeRate-API (open): common questions

Which is more reliable, CongressInvests or ExchangeRate-API (open)?

On our scheduled checks, ExchangeRate-API (open) leads on measured uptime — CongressInvests at —% versus ExchangeRate-API (open) 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 ExchangeRate-API (open) need an API key?

ExchangeRate-API (open) needs no key, while CongressInvests requires a free API key. If you want to start calling without signup, reach for ExchangeRate-API (open) first.

Can I call CongressInvests and ExchangeRate-API (open) from the browser?

Yes — both CongressInvests and ExchangeRate-API (open) 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 ExchangeRate-API (open) free for commercial use?

CongressInvests has unclear commercial terms, and ExchangeRate-API (open) has unclear commercial terms. 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.