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FastApi Simple Calculator vs ListLoco API

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

APIFastApi Simple CalculatorNEW—ListLoco APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

FastApi Simple Calculator vs ListLoco API: common questions

Which is more reliable, FastApi Simple Calculator or ListLoco API?

On our scheduled checks, ListLoco API leads on measured uptime — FastApi Simple Calculator at —% versus ListLoco API 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 FastApi Simple Calculator and ListLoco API need an API key?

Neither needs a paid key — FastApi Simple Calculator is callable with no signup, and ListLoco API is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call FastApi Simple Calculator and ListLoco API from the browser?

Neither sends browser-friendly CORS headers reliably, so call FastApi Simple Calculator and ListLoco API from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are FastApi Simple Calculator and ListLoco API free for commercial use?

FastApi Simple Calculator has unclear commercial terms, and ListLoco API 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.