RestoSignals vs The Guardian

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

Uptime · 30d
Uptime · 90d100%50.6%
Uptime · 30d100%0.0%
P50 · ms748517
P95 · ms7482726
AuthapiKeyapiKey
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverified
Free tierFree developer key — registration required
Rate limit5000 calls/day (developer tier)
In directory since2026-10-192026-07-05
operationalpartialdownno data

RestoSignals vs The Guardian: common questions

Which is more reliable, RestoSignals or The Guardian?

On our scheduled checks, RestoSignals leads on measured uptime — RestoSignals at 100% versus The Guardian at 50.6% 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, RestoSignals or The Guardian?

The Guardian has the lower median latency in our checks — RestoSignals responds in 748 ms versus The Guardian at 517 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 RestoSignals and The Guardian need an API key?

Both ask you to authenticate — RestoSignals uses an API key and The Guardian uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.

Can I call RestoSignals and The Guardian from the browser?

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

Are RestoSignals and The Guardian free for commercial use?

RestoSignals has unclear commercial terms, and The Guardian 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.