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Piloterr vs User Agent Lookup API

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

APIPiloterrNEW—User Agent Lookup APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Piloterr vs User Agent Lookup API: common questions

Which is more reliable, Piloterr or User Agent Lookup API?

On our scheduled checks, User Agent Lookup API leads on measured uptime — Piloterr at —% versus User Agent Lookup 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 Piloterr and User Agent Lookup API need an API key?

User Agent Lookup API needs no key, while Piloterr requires a free API key. If you want to start calling without signup, reach for User Agent Lookup API first.

Can I call Piloterr and User Agent Lookup API from the browser?

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

Are Piloterr and User Agent Lookup API free for commercial use?

Piloterr has unclear commercial terms, and User Agent Lookup 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.