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ELI vs Postman Echo

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

APIELINEW—Postman EchoNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key may be required for productionFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

ELI vs Postman Echo: common questions

Which is more reliable, ELI or Postman Echo?

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

Postman Echo needs no key, while ELI requires a free API key. If you want to start calling without signup, reach for Postman Echo first.

Can I call ELI and Postman Echo from the browser?

Only ELI 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 ELI and Postman Echo free for commercial use?

ELI has unclear commercial terms, and Postman Echo 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.