OWASP API Security Project vs RestoSignals

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

Uptime · 30d
Uptime · 90d55.6%100%
Uptime · 30d0.0%100%
P50 · ms176748
P95 · ms1646748
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverified
Free tierFree — limits not published
Rate limitUnpublished
In directory since2026-07-052026-10-19
operationalpartialdownno data

OWASP API Security Project vs RestoSignals: common questions

Which is more reliable, OWASP API Security Project or RestoSignals?

On our scheduled checks, RestoSignals leads on measured uptime — OWASP API Security Project at 55.6% versus RestoSignals 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, OWASP API Security Project or RestoSignals?

OWASP API Security Project has the lower median latency in our checks — OWASP API Security Project responds in 176 ms versus RestoSignals at 748 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 OWASP API Security Project and RestoSignals need an API key?

OWASP API Security Project needs no key, while RestoSignals requires a free API key. If you want to start calling without signup, reach for OWASP API Security Project first.

Can I call OWASP API Security Project and RestoSignals from the browser?

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

Are OWASP API Security Project and RestoSignals free for commercial use?

OWASP API Security Project has unclear commercial terms, and RestoSignals 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.