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SEO Score vs TotalShiftLeft Sandbox

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

APISEO ScoreHEALTHY91TotalShiftLeft SandboxHEALTHY95
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms634328
P95 · ms17041741
AuthapiKeynone
CORSnono
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

SEO Score vs TotalShiftLeft Sandbox: common questions

Which is more reliable, SEO Score or TotalShiftLeft Sandbox?

Both are neck-and-neck — SEO Score and TotalShiftLeft Sandbox each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, SEO Score or TotalShiftLeft Sandbox?

TotalShiftLeft Sandbox has the lower median latency in our checks — SEO Score responds in 634 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 SEO Score and TotalShiftLeft Sandbox need an API key?

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

Can I call SEO Score and TotalShiftLeft Sandbox from the browser?

Neither sends browser-friendly CORS headers reliably, so call SEO Score 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 SEO Score and TotalShiftLeft Sandbox free for commercial use?

SEO Score 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.