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MCU Countdown vs ReSmush.it

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

APIMCU CountdownNEW—ReSmush.itNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesno
Card requirednono
Commercial useunclearunclear
Data licenseUnverified (movie data from TMDB)N/A — optimization service, not a dataset
Free tierFree — limits not publishedFree; per-image size cap applies (see docs)
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

MCU Countdown vs ReSmush.it: common questions

Which is more reliable, MCU Countdown or ReSmush.it?

On our scheduled checks, ReSmush.it leads on measured uptime — MCU Countdown at —% versus ReSmush.it 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 MCU Countdown and ReSmush.it need an API key?

Neither needs a paid key — MCU Countdown is callable with no signup, and ReSmush.it is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call MCU Countdown and ReSmush.it from the browser?

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

Are MCU Countdown and ReSmush.it free for commercial use?

MCU Countdown has unclear commercial terms, and ReSmush.it 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.