About this recipe
A recipe for Ai Agent Google Calendar Assistant Using Openai
Recipe Template
{
"id": "ITH6r6UYtlCyUcpj",
"meta": {
"instanceId": "b9faf72fe0d7c3be94b3ebff0778790b50b135c336412d28fd4fca2cbbf8d1f5"
},
"name": "AI Agent : Google calendar assistant using OpenAI",
"tags": [],
"nodes": [
{
"id": "2e670a54-f789-4c8b-abba-ae35c458f5ed",
"name": "When chat message received",
"type": "@n8n\/n8n-nodes-langchain.chatTrigger",
"position": [
-280,
0
],
"webhookId": "5308edc9-738b-4aae-a789-214e2392579a",
"parameters": {
"options": []
},
"typeVersion": 1.1
},
{
"id": "96bf895f-a18c-4a4c-bc26-3ec5d2372de5",
"name": "OpenAI Chat Model",
"type": "@n8n\/n8n-nodes-langchain.lmChatOpenAi",
"position": [
160,
820
],
"parameters": {
"model": "gpt-4o",
"options": []
},
"credentials": {
"openAiApi": {
"id": "",
"name": "OpenAi"
}
},
"typeVersion": 1
},
{
"id": "270176df-9c2d-4f1a-b017-9349cb249341",
"name": "Window Buffer Memory",
"type": "@n8n\/n8n-nodes-langchain.memoryBufferWindow",
"position": [
580,
820
],
"parameters": [],
"typeVersion": 1.3
},
{
"id": "5cdece35-bd69-4c77-b240-963df8781d64",
"name": "Google Calendar - Get Events",
"type": "n8n-nodes-base.googleCalendarTool",
"position": [
960,
800
],
"parameters": {
"options": {
"timeMax": "={{ $fromAI('end_date') }}",
"timeMin": "={{ $fromAI('start_date') }}"
},
"calendar": {
"__rl": true,
"mode": "list",
"value": "",
"cachedResultName": ""
},
"operation": "getAll",
"descriptionType": "manual",
"toolDescription": "Use this tool when you\u2019re asked to retrieve events data."
},
"credentials": {
"googleCalendarOAuth2Api": {
"id": "",
"name": "Google Calendar account"
}
},
"typeVersion": 1.2
},
{
"id": "634e6472-099c-4f0e-b9eb-67956c4881b8",
"name": "Google Calendar - Create events",
"type": "n8n-nodes-base.googleCalendarTool",
"position": [
1380,
800
],
"parameters": {
"end": "={{ $fromAI('end_date') }} ",
"start": "={{ $fromAI('start_date') }} ",
"calendar": {
"__rl": true,
"mode": "list",
"value": "",
"cachedResultName": ""
},
"descriptionType": "manual",
"toolDescription": "Use this Google Calendar tool when you are asked to create an event.",
"additionalFields": {
"summary": "={{ $fromAI('event_title') }} ",
"attendees": [],
"description": "={{ $fromAI('event_description') }} "
},
"useDefaultReminders": false
},
"credentials": {
"googleCalendarOAuth2Api": {
"id": "",
"name": "Google Calendar account"
}
},
"typeVersion": 1.2
},
{
"id": "5c93e130-29d5-489b-84ea-3e31f5849b3a",
"name": "Sticky Note",
"type": "n8n-nodes-base.stickyNote",
"position": [
-380,
-380
],
"parameters": {
"color": 7,
"width": 320,
"height": 560,
"content": "## Chat trigger - When a message is received\n\nThis node is the **entry point of the workflow**. \nIt triggers the workflow whenever a message is sent to the **chat interface**.\n\nOptions with n8n:\n- **Embed the chat interface** anywhere you want.\n- Use a **webhook node** instead of this node to connect with interfaces like **[Streamlit](https:\/\/docs.streamlit.io\/develop\/tutorials\/llms\/build-conversational-apps)** or **[OpenWebUI](https:\/\/docs.openwebui.com\/)**.\n- Use nodes for communication platforms (**Slack**, **Teams**, **Discord**, etc.) if you know how to configure them.\n"
},
"typeVersion": 1
},
{
"id": "a1e850b4-d0fe-417c-8e1e-13fb4cdbb0a8",
"name": "Sticky Note1",
"type": "n8n-nodes-base.stickyNote",
"position": [
60,
-380
],
"parameters": {
"color": 7,
"width": 1520,
"height": 560,
"content": "## Tools Agent - Calendar AI Agent\n\nThis **node** configures the **AI agent** for interaction with Google Calendar. \nIt includes the following features:\n\n- A **prompt source**: This is the user message derived from the chat input of the preceding node (`When chat message is received`).\n- A **system message**: This defines the system prompt to guide the AI agent's behavior. It incorporates the variable `{{ DateTime.local().toFormat('cccc d LLLL yyyy') }`, allowing the AI agent to determine the current date and interact with Google Calendar accordingly. For example, the agent can understand a request like \"Create an event called 'n8n workflow review' for next Tuesday.\"\n\n\nn8n nodes come with built-in **guardrails**, ensuring that if the user requests tasks outside the AI agent's setup, it may not function as intended. (Feel free to test it!)\n"
},
"typeVersion": 1
},
{
"id": "9b259245-5fd5-4798-973e-bc6aa15da20f",
"name": "Calendar AI Agent",
"type": "@n8n\/n8n-nodes-langchain.agent",
"position": [
580,
0
],
"parameters": {
"text": "={{ $json.chatInput }}",
"options": {
"systemMessage": "=You are a Google Calendar assistant.\nYour primary goal is to assist the user in managing their calendar effectively using two tools: Event Creation and Event Retrieval. Always base your responses on the current date: \n{{ DateTime.local().toFormat('cccc d LLLL yyyy') }}.\nGeneral Guidelines:\nIf the user's initial message is vague (e.g., \"hello\" or a generic greeting) or does not specify a request, explain your capabilities clearly:\nExample: \"Hello! I can help you manage your Google Calendar. You can ask me to create an event or retrieve event data. What would you like me to do?\"\nIf the user specifies a request in their first message, begin preparing to use the appropriate tool:\nFor event creation, gather necessary details like start date, end date, title, and description.\nFor event retrieval, ask for the date range or time period they want to query.\nTool: Event Creation\nWhen asked to create an event:\n\nRequest the start and end dates\/times from the user.\nDate format: YYYY-MM-DD HH:mm:ss\nCollect the following information:\nstart_date: Exact start date and time of the event.\nend_date: Exact end date and time of the event.\nevent_title: Event title in uppercase. Suggest one if not provided.\nevent_description: Generate a brief description and present it for confirmation.\nTool: Event Retrieval\nWhen asked to retrieve events:\n\nAsk for the date range or period they are interested in. Examples:\nFor \"last week,\" retrieve events from Monday of the previous week to Friday of the same week.\nFor \"today,\" use the current date.\nFormat the date range:\nstart_date: Start date and time in YYYY-MM-DD HH:mm:ss.\nend_date: End date and time in YYYY-MM-DD HH:mm:ss.\nKey Behaviors:\nClarity: Provide a clear and helpful introduction when the user's request is unclear.\nValidation: Confirm details with the user before finalizing actions.\nAdaptation: Handle varying levels of detail in requests (e.g., \"Add a meeting for next Monday morning\" or \"Retrieve my events for this weekend\").\nProactivity: Offer suggestions to fill in missing details or clarify ambiguous inputs.\nLanguage Matching: Ensure all interactions, including event titles, descriptions, and messages, are in the user's language to provide a seamless experience."
},
"promptType": "define"
},
"typeVersion": 1.7
},
{
"id": "b902a7d0-c2ca-4ab9-9f2a-047b9ccb1678",
"name": "Sticky Note2",
"type": "n8n-nodes-base.stickyNote",
"position": [
60,
240
],
"parameters": {
"color": 5,
"width": 320,
"height": 720,
"content": "## OpenAI chat model\n\nThis node specifies the chat model used by the agent. \nIn the template, the **default LLM is gpt-4o** for its high relevance.\n\nOther options:\n- You can **try gpt-4o-mini**, which is more cost-effective.\n- You can also choose **other LLM providers besides OpenAI**, but make sure the LLM you select **supports tool-calling**.\n"
},
"typeVersion": 1
},
{
"id": "c67e1e1b-ef9a-4fec-a860-4ec6b7439df6",
"name": "Sticky Note3",
"type": "n8n-nodes-base.stickyNote",
"position": [
460,
240
],
"parameters": {
"color": 5,
"width": 320,
"height": 720,
"content": "## Window buffer memory\n\nThis node manages the **memory** of the agent, specifically the **context window length** for chat history. \nThe default is set to 5 messages.\n\nNote: \nThe **memory** is **temporary**. If you want to **store conversations with the agent**, you should use other nodes like **Postgres chat memory**. \nThis can be easily set up with services like **[Supabase](https:\/\/supabase.com\/)**.\n"
},
"typeVersion": 1
},
{
"id": "bf719d53-e21b-4bd5-9443-c24d008f732b",
"name": "Sticky Note4",
"type": "n8n-nodes-base.stickyNote",
"position": [
860,
240
],
"parameters": {
"color": 5,
"width": 320,
"height": 720,
"content": "## Google Calendar - Get Events\n\nThis sub-node is a tool used by the AI agent. \nIts purpose is to **retrieve events based on the user input**. \nFor example: *\"Can you give me the events from last week about internal process ?\"*\n\nThe AI agent is designed to **use this tool only** when it has a **date range**. \nIf the user hasn\u2019t provided a date range, the **AI agent will ask the user** for it.\n\nThe **variables** `{{ $fromAI('start_date') }}` and `{{ $fromAI('end_date') }}` are **dynamically filled by the AI**.\n"
},
"typeVersion": 1
},
{
"id": "e94eb1f8-df42-414b-9bec-9e6991a5a832",
"name": "Sticky Note5",
"type": "n8n-nodes-base.stickyNote",
"position": [
1260,
240
],
"parameters": {
"color": 5,
"width": 320,
"height": 720,
"content": "## Google Calendar - Create Events\n\nThis sub-node is a tool used by the AI agent. \nIts purpose is to **create events based on the user input**. \nFor example: \"Can you create an event 'Quarter revenue meeting' on [date] from [hour] to [hour] ?\"\n\nThe AI agent is designed to **use this tool only** when it has a **date range**. \nIf the user hasn\u2019t provided a **date range**, the AI agent will **ask the user** for it. \nThe variables `{{ $fromAI('start_date') }}` and `{{ $fromAI('end_date') }}` are dynamically filled by the AI.\n\nBefore creating the event, the AI agent will **confirm with the user** if the **title** and **description** of the event are correct. \nThe variables used for this are:\n- `{{ $fromAI('event_title') }}`\n- `{{ $fromAI('event_description') }}`\n"
},
"typeVersion": 1
},
{
"id": "707c011c-c822-4922-8ef7-c4368947d179",
"name": "Sticky Note6",
"type": "n8n-nodes-base.stickyNote",
"position": [
860,
1000
],
"parameters": {
"color": 4,
"width": 720,
"height": 380,
"content": "## Having fun with it ? Here\u2019s how to level up this AI agent ! \n\nThis workflow demonstrates **how easily you can set up an AI agent to call tools** for you using **n8n**. \nThe tasks here are **useful but very basic**. \n\nIf you want to **enhance the tool-calling capabilities**, consider the following:\n\n- Explore the **\"options\"** in the Google Calendar nodes to see additional features you can use. \n For example, let the AI agent add attendees to events it creates.\n\n- Implement the AI agent with your **teammates and link it to each calendar**. \n Use a `{{ $fromAI('') }}` variable for the calendar field and refine the prompts to suit your needs.\n\n- Add **more actions** for the AI agent to perform with the **Google Calendar API**, expanding its functionality.\n"
},
"typeVersion": 1
}
],
"active": false,
"pinData": [],
"settings": {
"timezone": "Europe\/Paris",
"callerPolicy": "workflowsFromSameOwner",
"executionOrder": "v1"
},
"versionId": "25b51038-e103-4be6-bcd1-64df4b90d4c6",
"connections": {
"Calendar AI Agent": {
"main": [
[]
]
},
"OpenAI Chat Model": {
"ai_languageModel": [
[
{
"node": "Calendar AI Agent",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Window Buffer Memory": {
"ai_memory": [
[
{
"node": "Calendar AI Agent",
"type": "ai_memory",
"index": 0
}
]
]
},
"When chat message received": {
"main": [
[
{
"node": "Calendar AI Agent",
"type": "main",
"index": 0
}
]
]
},
"Google Calendar - Get Events": {
"ai_tool": [
[
{
"node": "Calendar AI Agent",
"type": "ai_tool",
"index": 0
}
]
]
},
"Google Calendar - Create events": {
"ai_tool": [
[
{
"node": "Calendar AI Agent",
"type": "ai_tool",
"index": 0
}
]
]
}
}
}How to Use an n8n Template
1
Create a New Workflow
Click "New Workflow" in your n8n dashboard to get started.
2
Copy & Paste Template
First, copy this template:
Click here to copy the JSON
.
Then, in n8n, click the three dots (···) → "Import from file" and paste the JSON code.
3
Customize the Nodes
Go through each node in the workflow to update inputs like spreadsheet IDs, email addresses, or message content. Adjust field mappings to match your data.
4
Grant Access
For nodes that connect to external apps (like Google Sheets or Slack), you'll need to grant access. Connect your accounts using OAuth or an API key and save the credentials in the node.
5
Test It
Run the workflow by clicking "Execute Node" for each step or "Run Once" for the whole thing. Check the right sidebar to inspect data and debug any errors (they'll show up in red).
6
Activate Workflow
Once everything works as expected, click the "Activate" toggle to turn your workflow on. You're all set!