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CongressInvests vs Exchangerate.dev

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

APICongressInvestsNEW—Exchangerate.devNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — key may be requiredFree — limits not published
Rate limitUnpublished12 req/window · 11 remaining · resets 1783515720
In directory since2026-07-052026-07-05
operationalpartialdownno data

CongressInvests vs Exchangerate.dev: common questions

Which is more reliable, CongressInvests or Exchangerate.dev?

On our scheduled checks, Exchangerate.dev leads on measured uptime — CongressInvests at —% versus Exchangerate.dev 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.dev need an API key?

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

Can I call CongressInvests and Exchangerate.dev from the browser?

Only CongressInvests is browser-friendly — it returns CORS headers over HTTPS. Exchangerate.dev needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are CongressInvests and Exchangerate.dev free for commercial use?

CongressInvests has unclear commercial terms, and Exchangerate.dev 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.