Documents & Productivity — entry 026 of 31
Todoist
Todoist's API manages tasks, projects, labels, and filters for its to-do list app, authenticated with a personal API token or an OAuth2 app flow. The legacy REST v2 and Sync v9 endpoints were fully decommissioned in early 2026 (now returning HTTP 410 Gone) in favor of a single unified API v1, which this entry's docsUrl now points to. The free plan includes full API access alongside Pro and Business -- pricing only changes product features like reminders and filters, not API availability.
AuthenticationOAuthRequires an OAuth flow; expect app registration.
HTTPSSupportedTraffic is encrypted in transit.
CORSDisabledBrowser calls need a server-side proxy.
PricingFreemiumA usable free tier exists, with paid plans for more volume.
FormatsJSONResponses can be requested as JSON.
GreatAPIs Score
Score68
Authentication8/25OAuth flow required
Pricing17/20Freemium tier available
Docs14/20Documentation URL provided
Formats9/15Single response format
Freshness20/20Verified within 6 months
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<a href="https://greatapis.com/api/todoist/"><img src="https://greatapis.com/badge/todoist.svg" alt="Scored 68 on greatapis.com"></a>Auth quickstart
- Register an app / run the OAuth flow to obtain a bearer token.
- Send it as an Authorization header
Authorization: Bearer <token>
Stored keyNo key stored
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.