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httpSMS vs ItsThisForThat

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

APIhttpSMSNEW—ItsThisForThatNEW—
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 — limits not published
Rate limitUnpublishedUnpublished (docs ask you not to hammer it)
In directory since2026-07-052026-07-05
operationalpartialdownno data

httpSMS vs ItsThisForThat: common questions

Which is more reliable, httpSMS or ItsThisForThat?

On our scheduled checks, ItsThisForThat leads on measured uptime — httpSMS at —% versus ItsThisForThat 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 httpSMS and ItsThisForThat need an API key?

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

Can I call httpSMS and ItsThisForThat from the browser?

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

Are httpSMS and ItsThisForThat free for commercial use?

httpSMS has unclear commercial terms, and ItsThisForThat 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.