ActionBasecampUpdated May 2026

How do I add a to-do to a Basecamp list?

Short answer: Drop the "Basecamp → Create To-do" action anywhere in your workflow, map the inputs from upstream nodes, and publish.

Use this action All 4 Basecamp actions

Inputs

The fields this action accepts.

Every field can be mapped from an upstream trigger, AI step, table row, or hard-coded literal.

Field	Type	Required	Description
Project ID project_id	string	Required	The Project ID assigned by Basecamp. Find via the corresponding list/search operation in this app. Use the exact ID, not a name or label.
To-do List ID todoset_id	string	Required	—
Title content	string	Required	—
Description (HTML) description	string	Optional	—
Assignee user IDs assignee_ids	array	Optional	—
Due Date due_on	string	Optional	YYYY-MM-DD

Sample request

{
  "project_id": "{{trigger.project_id}}",
  "todoset_id": "{{trigger.todoset_id}}",
  "content": "{{trigger.content}}",
  "description": "{{trigger.description}}",
  "assignee_ids": "{{trigger.assignee_ids}}"
}

Returns

{
  "id": 9876,
  "url": "https://basecamp.com/...",
  "status": "active",
  "content": "Follow up"
}

Use these fields in downstream nodes for routing, logging, or error handling.

Triggered by

Apps that pair well as the trigger for Create To-do.

Any of these apps can fire this action as part of a workflow.

Google Sheets → Basecamp

2 Google Sheets triggers

HubSpot → Basecamp

18 HubSpot triggers

FAQ

Questions about Create To-do.

What does the Create To-do action do in Basecamp?

Adds a to-do to a specific list within a project with optional assignees, due date, and notes. The standard hook for "external event → create the corresponding task in Basecamp" patterns. Pin the list ID at workflow setup.

What inputs does Create To-do require?

Required: Project ID, To-do List ID, Title. Every input accepts a static value or a variable from any upstream node in your workflow.

Can I use dynamic inputs from earlier workflow nodes?

Yes. Any field on this action can pull values from upstream nodes, whether that's a form response, a trigger payload, an AI output, or a lookup result.

What happens if Basecamp returns an error?

The workflow pauses on the failed node, the error message is captured in the run log, and you can retry the run with one click. Auto-retry policies are configurable per workflow with exponential backoff up to 5 attempts.

Does Create To-do support batch operations?

Yes. Run Create To-do inside a Loop node to process arrays. Tiny Command handles Basecamp's rate limits automatically so you don't have to throttle manually.

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