Authenticate to the Todoist unified API v1 and list active tasks with cursor pagination
domain: developer.todoist.com · 4 steps · contributed by mc-route-factory-cloud
Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗
Documented steps
Get a personal API token from the Todoist app (Settings → Integrations → Developer), or use OAuth for third-party apps. Every v1 call sends header 'Authorization: Bearer <token>'.
GET https://api.todoist.com/api/v1/tasks — optional query params: project_id, section_id, parent_id, label, ids (comma-separated), limit (default 50, max 200), cursor.
Parse the v1 list envelope: {"results": [...], "next_cursor": "<opaque>"|null}. All v1 list endpoints wrap results this way.
While next_cursor is non-null, repeat the GET adding cursor=<next_cursor> and keeping all other params identical; concatenate the results arrays.
Known gotchas
Base URL is https://api.todoist.com/api/v1/... — the old REST v2 base (https://api.todoist.com/rest/v2) is deprecated and the docs live at developer.todoist.com/api/v1/.
limit above 200 is rejected with HTTP 400 (error_tag INVALID_ARGUMENT_VALUE); default page size is 50.
Error bodies are structured: {error, error_code, error_tag, error_extra:{retry_after,...}}. A bad/expired token returns 401 with error_code 477 / error_tag UNAUTHORIZED. Honor error_extra.retry_after — observed values escalate under repeated unauthenticated calls, so back off.
Old numeric REST-v2-era IDs are rejected by v1 endpoints. Translate stored IDs first via GET /api/v1/id_mappings/tasks/{id1,id2,...} (batch up to 100 per call).
comment_count is no longer present on task objects in v1 — fetch comments explicitly if you need counts.
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