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Clockify API vs Todoist

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

APIClockify APIDEAD0TodoistDEAD0
Uptime · 30d
Uptime · 90d0.0%0.0%
Uptime · 30d0.0%0.0%
P50 · ms——
P95 · ms——
AuthapiKeyapiKey
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree tier — API key required
Rate limitUnpublishedRetry-After: 2s
In directory since2026-07-052026-07-05
operationalpartialdownno data

Clockify API vs Todoist: common questions

Which is more reliable, Clockify API or Todoist?

Both are neck-and-neck — Clockify API and Todoist each measure 0.0% 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.

Do Clockify API and Todoist need an API key?

Both ask you to authenticate — Clockify API uses an API key and Todoist 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 Clockify API and Todoist from the browser?

Yes — both Clockify API and Todoist send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are Clockify API and Todoist free for commercial use?

Clockify API 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.