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Add a field to a custom activity type

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Add a field to a custom activity type

with Close
Works with AI assistants

Use Close: its Close Custom Fields.activity API lets you add a field to a custom activity type in a single step (POST /custom_field/activity/). Close also has an MCP server, so an AI assistant like Claude or ChatGPT can do it for you. capabilities.work can help you get signed up and connected.

  • How do I add a new field to a custom activity type?
  • Can an activity custom field be marked as required?
Say it to your AI assistant
  • Create a new activity custom field on my custom activity type.
  • Add a required choices field to the demo custom activity.
For your developer

POST /custom_field/activity/ in Close Custom Fields.activity API. Full spec on APIs.io.