Manage Google Calendar events with n8n AI Agent (Get, Create, Delete)

Pass natural-language commands from a parent workflow to a sub-agent, letting an LLM choose the right Google Calendar tool to list, create, or delete events

Who

Automation users who want to build a calendar assistant in n8n and delegate Google Calendar operations to an AI Agent

You get

After the parent workflow sends a natural-language instruction, the sub-agent automatically selects Get/Create/Delete tools for the target calendar and returns the result

You need

n8n · openai · google-calendar · memory

Steps

1. Import template and declare inputs

   Import this sub-workflow template into n8n. Open the "When Executed by Another Workflow" trigger node and confirm it exposes two inputs: `text` (string, natural-language user instruction) and `sessionid` (string, for session isolation).

2. Configure Google Calendar credentials and calendar

   Open each of the three Google Calendar tool nodes (Get, Create, Delete). In every node, select your Google Calendar OAuth2 credential and replace the calendar placeholder (e.g., `[email protected]`) with the actual calendar ID. Set Get node operation to getAll; Create node requires start, end, and summary to be filled by the AI; set Delete node operation to delete, which requires eventId.

3. Configure AI Agent and connect parent workflow

   Open the AI Agent node and confirm promptType is define and the text expression is `={{ $json.text }}`. Connect the OpenAI Chat Model (gpt-4.1-mini) and Simple Memory (sessionKey `={{ $json.sessionid }}`) to the AI Agent's corresponding interfaces. Connect the parent workflow's toolWorkflow node to this sub-workflow.

   Execution prompt · Source text。AI Agent node options.systemMessage field

   Copy prompt

   =You are a calendar assistant who can easily manage events in a google calendar. 
   You must provide the start and end date.
   
   If you need to create events in the calendar use the "Get" tool. To delete events in the calendar use "Delete", and to create events use the "Create" tool.
   
   the current date and time is {{ $now}}
   Additionally, you must provide the summary and other details for the calendar which your tool might need.

You are building an n8n sub-workflow that lets an AI Agent act on Google Calendar. First confirm you have: 1) OpenAI API key; 2) Google Calendar OAuth2 credentials; 3) target calendar ID. Then import the template, configure credentials and calendar in the three tool nodes, set the AI Agent systemMessage, and test Get/Create/Delete from the parent workflow.