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ReqRes vs US Autocomplete

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

APIReqResNEW—US AutocompleteREACHABLE—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

ReqRes vs US Autocomplete: common questions

Which is more reliable, ReqRes or US Autocomplete?

On our scheduled checks, US Autocomplete leads on measured uptime — ReqRes at —% versus US Autocomplete 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 ReqRes and US Autocomplete need an API key?

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

Can I call ReqRes and US Autocomplete from the browser?

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

Are ReqRes and US Autocomplete free for commercial use?

ReqRes has unclear commercial terms, and US Autocomplete 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.