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Postman Echo vs UUID Generator

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

APIPostman EchoNEW—UUID GeneratorNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublished60 req/window · 59 remaining
In directory since2026-07-052026-07-05
operationalpartialdownno data

Postman Echo vs UUID Generator: common questions

Which is more reliable, Postman Echo or UUID Generator?

On our scheduled checks, UUID Generator leads on measured uptime — Postman Echo at —% versus UUID Generator 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 Postman Echo and UUID Generator need an API key?

Neither needs a paid key — Postman Echo is callable with no signup, and UUID Generator is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Postman Echo and UUID Generator from the browser?

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

Are Postman Echo and UUID Generator free for commercial use?

Postman Echo has unclear commercial terms, and UUID Generator 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.