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ReqRes vs Todoist

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

APIReqResHEALTHY98TodoistDEAD0
Uptime · 30d
Uptime · 90d100%0.0%
Uptime · 30d100%0.0%
P50 · ms256—
P95 · ms582—
AuthnoneapiKey
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedRetry-After: 2s
In directory since2026-07-052026-07-05
operationalpartialdownno data

ReqRes vs Todoist: common questions

Which is more reliable, ReqRes or Todoist?

On our scheduled checks, ReqRes leads on measured uptime — ReqRes at 100% versus Todoist at 0.0% 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 ReqRes and Todoist need an API key?

ReqRes needs no key, while Todoist requires a free API key. If you want to start calling without signup, reach for ReqRes first.

Can I call ReqRes and Todoist from the browser?

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

Are ReqRes and Todoist free for commercial use?

ReqRes has unclear commercial terms, and Todoist 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.