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ListLoco API vs OOPSpam

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

APIListLoco APINEW—OOPSpamNEW—
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 limitUnpublished1000 req/window · 999 remaining
In directory since2026-07-052026-07-05
operationalpartialdownno data

ListLoco API vs OOPSpam: common questions

Which is more reliable, ListLoco API or OOPSpam?

On our scheduled checks, OOPSpam leads on measured uptime — ListLoco API at —% versus OOPSpam 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 OOPSpam need an API key?

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

Can I call ListLoco API and OOPSpam from the browser?

Neither sends browser-friendly CORS headers reliably, so call ListLoco API and OOPSpam 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 OOPSpam free for commercial use?

ListLoco API has unclear commercial terms, and OOPSpam 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.