Todoist

Your Todoist, in two nodes on one connected credential. The action runs 30 operations on tasks, projects, sections, labels and comments, and can also be an AI toolkit. The trigger fires a flow when a task is added, completed or changed, a comment is posted, a project or section changes, or a reminder goes off.

Setup

Connect Todoist under Settings → Credentials, or straight from the node: name the credential, sign in to Todoist and approve the HostWebhook app. It asks to read, add, change and delete your tasks and projects.

The credential remembers which Todoist account it belongs to. Reconnecting it to a different account is refused, because every trigger on it would start listening somewhere else.

Operations

Filling in the fields

• Project, Section and the Label you edit or delete are picked from your account. To type an ID or a template ({{payload.projectId}}), use the picker's footer.
• Changing the Project clears the Section: a section only exists in its own project.
• Labels on a task are names. Pick them from your account or type them; a name that isn't one of your labels still goes on the task, but Todoist doesn't add it to your labels list.
• Deadline, Duration and Reminder need Todoist Pro or Business. On the free plan Todoist refuses the deadline and ignores the duration without saying so.
• Priority reads as in Todoist: P1 is urgent, P4 is normal.
• Due takes plain words — tomorrow at 5pm, every Monday — or a date like 2026-10-20. In another language, set Language of the due date (es for mañana a las 5).
• Quick Add task reads one line like Todoist does: Pay rent tomorrow #Home @bills p1.
• Move task goes to one place only: a project, a section or a parent task. The node warns if more than one is filled in.

Lists come back as { tasks: [...], count, hasMore } (or projects, sections, labels, comments): 50 unless you set Max results, up to 200, and the next node runs once per item.

AI toolkit mode

Once the credential is picked, the node asks for a Mode. AI toolkit turns it into 30 tools that an AI Node — or an MCP client, through one of your MCP servers — calls by name: an assistant that reads today's tasks, adds the ones from an email and completes what's done.

What you control

• Blocked tools. The five deletes start blocked. Unblock only what the agent really needs, under Block these tool calls.
• Characters per call sent to the model. 20,000 by default, anything from 1,000 to 200,000.

What goes back to the model

• The same response as the operation. Lists return 50 unless the model asks for more, up to 200.
• Priorities are p1 (urgent) to p4, as in Todoist.
• Project and section IDs come from the account: the model is told to look them up with list_todoist_projects and list_todoist_sections.
• Items that don't fit the characters limit are left out whole, with a notes field saying how many.

Testing a tool

{ "operation": "search_todoist_tasks", "query": "today | overdue" }

The trigger

Pick Todoist as the service on a Trigger node and a Todoist credential. Connecting the HostWebhook app already sends your account's events to HostWebhook, so activating changes nothing in Todoist and never expires.

What fires it

• Event Trigger takes one or more; pick at least one.
• Project is optional: only events from that project fire the trigger. Empty = every project.
• Label, filter and reminder events don't belong to a project, so they always fire.

What the trigger sends downstream

The item that changed is in object, with Todoist's field names. Task updated also brings the task as it was before, in previous.

{
  "id": "6XR4GqQQCW6Gv9h4",
  "event": "item:completed",
  "label": "Task completed",
  "objectType": "task",
  "projectId": "6XR4H993xv8H5qCR",
  "object": {
    "id": "6XR4GqQQCW6Gv9h4",
    "content": "Send the proposal to Acme",
    "project_id": "6XR4H993xv8H5qCR",
    "labels": ["clients"],
    "priority": 4,
    "due": { "date": "2026-10-13", "string": "Monday" },
    "checked": true,
    "…": "…"
  },
  "initiator": { "id": "2671355", "name": "Sam Rivera", "email": "sam@example.com" },
  "userId": "2671355",
  "triggeredAt": "2026-10-11T15:39:38.000000Z"
}

Trying it out

The trigger's Test push shows what each event you picked will look like — examples with the exact shape this trigger dispatches, so you can write {{payload.object.content}} in the nodes below it from the start. To see a real one, add or complete a task in Todoist.

Gotchas

• A recurring task doesn't close. Completing it moves it to its next date, and Task completed still fires.
• Completed tasks aren't in “List tasks”. Use List completed tasks, with a window of up to 3 months.
• Archived projects aren't in the pickers. To unarchive one, type its ID.
• Reminders need Todoist Pro or Business. On the free plan, Reminder fired never arrives.
• A 429 is retried once. Todoist limits how many requests an account makes per minute; a flow that adds many tasks at once can touch it.