ActionBasecampUpdated September 2026

How do I post a message to a Basecamp project's board?

Short answer: You can post message to board in Basecamp by hand from its own interface, but it won’t repeat itself. On TinyCommand, add the Basecamp Post Message to Board action to a workflow, map its 5 inputs from any upstream app, and it runs automatically every time the trigger fires. No code, and a free tier to start.

Post Message to Board in Basecamp — start free All 4 Basecamp actions

Post Message to Board in Basecamp — start free

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.
Message Board ID message_board_id	string	Required	–
Subject subject	string	Required	Message subject line.
Body (HTML) content	string	Required	–
Status status	options	Optional	–

Sample request

{
  "project_id": "{{trigger.project_id}}",
  "message_board_id": "{{trigger.message_board_id}}",
  "subject": "e.g. Quick update",
  "content": "{{trigger.content}}",
  "status": "{{trigger.status}}"
}

Returns

{
  "id": 1111,
  "url": "https://basecamp.com/...",
  "subject": "FYI"
}

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

Triggered by

Apps that pair well as the trigger for Post Message to Board.

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 Post Message to Board.

What does the Post Message to Board action do in Basecamp?

Posts a message to the project's message board — the place teams use for longer-form updates and discussion (vs the Campfire chat tool for ephemera). Useful for "weekly automated project digest → post to the project board" workflows.

What inputs does Post Message to Board require?

Required: Project ID, Message Board ID, Subject, Body (HTML). 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 run history shows the failed step with its input and the error message Basecamp returned, so you can fix the input and run the workflow again. Automatic retries are built into HTTP steps only, where you can also set your own retry count and delay.

Does Post Message to Board support batch operations?

Run Post Message to Board inside a loop to process each item in an array. TinyCommand does not throttle calls for you, so for large arrays add a Delay step if you need to stay within Basecamp's rate limits.

More actions

Other Basecamp actions.

Action

Complete To-do

Transitions a to-do to the completed state. Assignees get the standard Basecamp completion notification. Useful for "external CI run finished green → mark the deployment to-do done" cascading workflows.

Action

Create To-do

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.

Action

List Projects

Returns all active Basecamp projects the connected user is a member of. Useful for project-picker UIs in workflow setup or for cross-project reporting workflows that iterate over projects to gather metrics.

Post Message to Board in Basecamp — start free