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Host.io vs TotalShiftLeft Sandbox

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

APIHost.ioREACHABLE—TotalShiftLeft SandboxNEW—
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 — open sandbox, auth optional
Rate limitUnpublished100 req/window · 99 remaining · resets 60
In directory since2026-07-052026-07-05
operationalpartialdownno data

Host.io vs TotalShiftLeft Sandbox: common questions

Which is more reliable, Host.io or TotalShiftLeft Sandbox?

On our scheduled checks, TotalShiftLeft Sandbox leads on measured uptime — Host.io at —% versus TotalShiftLeft Sandbox 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 Host.io and TotalShiftLeft Sandbox need an API key?

TotalShiftLeft Sandbox needs no key, while Host.io requires a free API key. If you want to start calling without signup, reach for TotalShiftLeft Sandbox first.

Can I call Host.io and TotalShiftLeft Sandbox from the browser?

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

Are Host.io and TotalShiftLeft Sandbox free for commercial use?

Host.io has unclear commercial terms, and TotalShiftLeft Sandbox 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.