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ListLoco API vs Postman Echo

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

APIListLoco APINEW—Postman EchoNEW—
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

ListLoco API vs Postman Echo: common questions

Which is more reliable, ListLoco API or Postman Echo?

On our scheduled checks, Postman Echo leads on measured uptime — ListLoco API 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 ListLoco API and Postman Echo need an API key?

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

Can I call ListLoco API and Postman Echo from the browser?

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

Are ListLoco API and Postman Echo free for commercial use?

ListLoco API 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.