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Grass Touch API vs ImprovMX API

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

APIGrass Touch APINEW—ImprovMX APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublished301 req/window · 300 remaining · resets 1783526520
In directory since2026-07-052026-07-05
operationalpartialdownno data

Grass Touch API vs ImprovMX API: common questions

Which is more reliable, Grass Touch API or ImprovMX API?

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

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

Can I call Grass Touch API and ImprovMX API from the browser?

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

Are Grass Touch API and ImprovMX API free for commercial use?

Grass Touch API has unclear commercial terms, and ImprovMX API 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.