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MCU Countdown vs MusicBrainz

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

APIMCU CountdownHEALTHY95MusicBrainzHEALTHY82
Uptime · 30d
Uptime · 90d100%90.2%
Uptime · 30d100%86.7%
P50 · ms400660
P95 · ms14444770
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverified (movie data from TMDB)Core data CC0; some supplementary data CC BY-NC-SA 3.0
Free tierFree — limits not publishedFree — no key required
Rate limitUnpublished~1 request/second per IP; descriptive User-Agent required
In directory since2026-07-052026-07-05
operationalpartialdownno data

MCU Countdown vs MusicBrainz: common questions

Which is more reliable, MCU Countdown or MusicBrainz?

On our scheduled checks, MCU Countdown leads on measured uptime — MCU Countdown at 100% versus MusicBrainz at 90.2% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Which is faster, MCU Countdown or MusicBrainz?

MCU Countdown has the lower median latency in our checks — MCU Countdown responds in 400 ms versus MusicBrainz at 660 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do MCU Countdown and MusicBrainz need an API key?

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

Can I call MCU Countdown and MusicBrainz from the browser?

Yes — both MCU Countdown and MusicBrainz send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are MCU Countdown and MusicBrainz free for commercial use?

MCU Countdown has unclear commercial terms, and MusicBrainz allows commercial use on its free tier. 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.