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RSQ API vs TotalShiftLeft Sandbox

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

APIRSQ APINEW—TotalShiftLeft SandboxNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesno
HTTPSnoyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — open sandbox, auth optional
Rate limitUnpublished100 req/window · 99 remaining · resets 60
In directory since2026-07-052026-07-05
operationalpartialdownno data

RSQ API vs TotalShiftLeft Sandbox: common questions

Which is more reliable, RSQ API or TotalShiftLeft Sandbox?

On our scheduled checks, TotalShiftLeft Sandbox leads on measured uptime — RSQ API 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 RSQ API and TotalShiftLeft Sandbox need an API key?

Neither needs a paid key — RSQ API is callable with no signup, and TotalShiftLeft Sandbox is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call RSQ API and TotalShiftLeft Sandbox from the browser?

Neither sends browser-friendly CORS headers reliably, so call RSQ API and TotalShiftLeft Sandbox from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are RSQ API and TotalShiftLeft Sandbox free for commercial use?

RSQ API 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.