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Fake JSON API vs TotalShiftLeft Sandbox

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

APIFake JSON APIHEALTHY88TotalShiftLeft SandboxHEALTHY95
Uptime · 30d
Uptime · 90d99.02%100%
Uptime · 30d98.3%100%
P50 · ms865328
P95 · ms20061741
Authnonenone
CORSyesno
HTTPSyesyes
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

Fake JSON API vs TotalShiftLeft Sandbox: common questions

Which is more reliable, Fake JSON API or TotalShiftLeft Sandbox?

On our scheduled checks, TotalShiftLeft Sandbox leads on measured uptime — Fake JSON API at 99.02% versus TotalShiftLeft Sandbox at 100% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Which is faster, Fake JSON API or TotalShiftLeft Sandbox?

TotalShiftLeft Sandbox has the lower median latency in our checks — Fake JSON API responds in 865 ms versus TotalShiftLeft Sandbox at 328 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do Fake JSON API and TotalShiftLeft Sandbox need an API key?

Neither needs a paid key — Fake JSON 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 Fake JSON API and TotalShiftLeft Sandbox from the browser?

Only Fake JSON API 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 Fake JSON API and TotalShiftLeft Sandbox free for commercial use?

Fake JSON 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.