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Basecamp MCP Server

by jhliberty

create_card_step

Add a new step (sub-task) to a card in Basecamp 3 by specifying the project ID, card ID, step title, optional due date, and assignees. Streamlines task breakdown and assignment within projects.

Instructions

Create a new step (sub-task) for a card

Input Schema

NameRequiredDescriptionDefault
assignee_idsNoArray of person IDs to assign to the step
card_idYesThe card ID
due_onNoOptional due date (ISO 8601 format)
project_idYesThe project ID
titleYesThe step title

Input Schema (JSON Schema)

{ "properties": { "assignee_ids": { "description": "Array of person IDs to assign to the step", "items": { "type": "string" }, "type": "array" }, "card_id": { "description": "The card ID", "type": "string" }, "due_on": { "description": "Optional due date (ISO 8601 format)", "type": "string" }, "project_id": { "description": "The project ID", "type": "string" }, "title": { "description": "The step title", "type": "string" } }, "required": [ "project_id", "card_id", "title" ], "type": "object" }

MCP directory API

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