Get one function on a custom action by ID
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Look something up
Get one function on a custom action by ID
with HubSpot
Works with AI assistants
Use HubSpot: its Automation Actions V4 Functions API lets you get one function on a custom action by ID in a single step (GET /automation/actions/2026-09/{appId}/{definitionId}/functions/{functionType}/{functionId}). HubSpot 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 look up a single function on my workflow action when I know its ID?
- What does a specific custom action function contain?
Say it to your AI assistant
- Get function {functionId} of type {functionType} on action {definitionId} in app {appId}.
- Fetch the details of function {functionId} ({functionType}) from app {appId}'s definition {definitionId}.
For your developer
GET /automation/actions/2026-09/{appId}/{definitionId}/functions/{functionType}/{functionId} in Automation Actions V4 Functions API. Full spec on APIs.io.