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ImprovMX API vs The Muse

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

APIImprovMX APINEW—The MuseNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree tier — API key required
Rate limit301 req/window · 300 remaining · resets 1783526520Unpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

ImprovMX API vs The Muse: common questions

Which is more reliable, ImprovMX API or The Muse?

On our scheduled checks, The Muse leads on measured uptime — ImprovMX API at —% versus The Muse 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 ImprovMX API and The Muse need an API key?

The Muse needs no key, while ImprovMX API requires a free API key. If you want to start calling without signup, reach for The Muse first.

Can I call ImprovMX API and The Muse from the browser?

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

Are ImprovMX API and The Muse free for commercial use?

ImprovMX API has unclear commercial terms, and The Muse 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.