This workflow follows the Agent → Chainllm recipe pattern — see all workflows that pair these two integrations.
The workflow JSON
Copy or download the full n8n JSON below. Paste it into a new n8n workflow, add your credentials, activate. Full import guide →
{
"nodes": [
{
"id": "bd1dae81-daea-4539-bf1d-38eb9a2bd2f0",
"name": "Gmail Trigger",
"type": "n8n-nodes-base.gmailTrigger",
"position": [
500,
560
],
"parameters": {
"filters": {
"readStatus": "unread",
"includeSpamTrash": false
},
"pollTimes": {
"item": [
{
"mode": "everyMinute"
}
]
}
},
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"typeVersion": 1
},
{
"id": "a97c3ab1-6fbc-441e-af11-3c746936013b",
"name": "Chat OpenAI",
"type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
"position": [
720,
740
],
"parameters": {
"model": "gpt-4",
"options": {
"temperature": 0.1
}
},
"credentials": {
"openAiApi": {
"name": "<your credential>"
}
},
"typeVersion": 1
},
{
"id": "a1205598-7cd4-4278-ad53-0cfc7c7947ff",
"name": "Workflow Tool",
"type": "@n8n/n8n-nodes-langchain.toolWorkflow",
"position": [
1580,
759
],
"parameters": {
"name": "Calendar_Availability",
"workflowId": "={{ $workflow.id }}",
"description": "Call this tool to get my calendar availability as stringified JSON array."
},
"typeVersion": 1
},
{
"id": "5ba2c2b0-2218-45d2-a417-f86c80643397",
"name": "Chat OpenAI1",
"type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
"position": [
1420,
759
],
"parameters": {
"model": "gpt-4",
"options": {
"temperature": 0
}
},
"credentials": {
"openAiApi": {
"name": "<your credential>"
}
},
"typeVersion": 1
},
{
"id": "012835ec-c20a-4b84-bed8-67f6aac30698",
"name": "Sticky Note",
"type": "n8n-nodes-base.stickyNote",
"position": [
460,
460
],
"parameters": {
"width": 616.8060552874073,
"height": 410.24791575252334,
"content": "## Check if incoming email is about appointment\nWe use LLM to check subject and body of the email and determine if it's an appointment request. "
},
"typeVersion": 1
},
{
"id": "ceaa4f77-acc8-437e-9d61-16cf344a7748",
"name": "Sticky Note1",
"type": "n8n-nodes-base.stickyNote",
"position": [
1340,
460
],
"parameters": {
"width": 676.1951194231482,
"height": 241.70645019745504,
"content": "## Get calendar availability and compose a response\nMake sure to update the Workflow ID if you are running this as 2 workflows"
},
"typeVersion": 1
},
{
"id": "499def23-7dec-4131-91fd-326b1b824762",
"name": "Google Calendar",
"type": "n8n-nodes-base.googleCalendar",
"position": [
680,
1120
],
"parameters": {
"options": {
"timeMax": "={{ $now.plus(1, 'month').toISO() }}",
"timeMin": "={{ $now.minus(1, 'day').toISO() }}",
"singleEvents": true
},
"calendar": {
"__rl": true,
"mode": "list",
"value": "your_email@gmail.com",
"cachedResultName": "your_email@gmail.com"
},
"operation": "getAll",
"returnAll": true
},
"credentials": {
"googleCalendarOAuth2Api": {
"name": "<your credential>"
}
},
"typeVersion": 1
},
{
"id": "0f5f43fa-3386-4682-b620-21db35651d3b",
"name": "Execute Workflow Trigger",
"type": "n8n-nodes-base.executeWorkflowTrigger",
"position": [
460,
1120
],
"parameters": {},
"typeVersion": 1
},
{
"id": "8b2b82b9-c11f-4e7f-ab23-16ea5e395e11",
"name": "Format response",
"type": "n8n-nodes-base.itemLists",
"position": [
1560,
1120
],
"parameters": {
"include": "allFieldsExcept",
"options": {},
"aggregate": "aggregateAllItemData",
"operation": "concatenateItems",
"fieldsToExclude": "sort",
"destinationFieldName": "response"
},
"typeVersion": 3
},
{
"id": "ac363d85-5c6e-4a9f-9cfc-ecc15a325b01",
"name": "Stringify Response",
"type": "n8n-nodes-base.set",
"position": [
1780,
1120
],
"parameters": {
"values": {
"string": [
{
"name": "response",
"value": "={{ JSON.stringify($json.response) }}"
}
]
},
"options": {},
"keepOnlySet": true
},
"typeVersion": 2
},
{
"id": "399c5bc4-c8bd-4d0b-942a-9889447880a9",
"name": "Extract start, end and name",
"type": "n8n-nodes-base.set",
"position": [
1100,
1120
],
"parameters": {
"values": {
"string": [
{
"name": "start",
"value": "={{ DateTime.fromISO($json.start.dateTime).toLocaleString(DateTime.DATE_HUGE) }}, {{ DateTime.fromISO($json.start.dateTime).toLocaleString(DateTime.TIME_24_WITH_SHORT_OFFSET) }}"
},
{
"name": "end",
"value": "={{ DateTime.fromISO($json.end.dateTime).toLocaleString(DateTime.DATE_HUGE) }}, {{ DateTime.fromISO($json.end.dateTime).toLocaleString(DateTime.TIME_24_WITH_SHORT_OFFSET) }}"
},
{
"name": "name",
"value": "={{ $json.summary }}"
},
{
"name": "sort",
"value": "={{ $json.start.dateTime }}"
}
]
},
"options": {},
"keepOnlySet": true
},
"typeVersion": 2
},
{
"id": "a39b6c7d-fdcc-452d-9ef5-50b038153330",
"name": "Filter only confirmed and with set time",
"type": "n8n-nodes-base.filter",
"position": [
880,
1120
],
"parameters": {
"conditions": {
"string": [
{
"value1": "={{ $json.status }}",
"value2": "confirmed"
}
],
"boolean": [
{
"value1": "={{ $json.start.dateTime }}",
"value2": "={{ undefined }}",
"operation": "notEqual"
}
]
}
},
"typeVersion": 1
},
{
"id": "0e0a2be9-cde7-497d-94c5-180128382bb7",
"name": "Is appointment request",
"type": "n8n-nodes-base.if",
"position": [
1100,
560
],
"parameters": {
"conditions": {
"string": [
{
"value1": "={{ $json.is_appointment }}",
"value2": "true"
}
],
"boolean": [
{
"value1": "={{ $json.is_appointment }}",
"value2": true
}
]
},
"combineOperation": "any"
},
"typeVersion": 1
},
{
"id": "a6e11f63-a56a-4fe0-91c8-0dde2720e905",
"name": "Classify appointment",
"type": "@n8n/n8n-nodes-langchain.chainLlm",
"position": [
720,
560
],
"parameters": {
"prompt": "=Please evaluate the following email to determine if it suggests scheduling a meeting or a call:\nSubject: {{ encodeURI($json.Subject) }}\nSnippet: {{ encodeURI($json.snippet) }}\nIndicate your assessment by responding with \"true\" if it suggests a meeting or call, or \"false\" otherwise. Use lowercase for your response.\n"
},
"typeVersion": 1
},
{
"id": "b6411b14-67f6-4195-a834-60a4dc5e4851",
"name": "Structured Output Parser",
"type": "@n8n/n8n-nodes-langchain.outputParserStructured",
"position": [
880,
740
],
"parameters": {
"jsonSchema": "{\n \"type\": \"object\",\n \"properties\": {\n \"is_appointment\": {\n \"type\": \"boolean\"\n }\n }\n}"
},
"typeVersion": 1
},
{
"id": "96248431-290b-4fb1-94a3-714e7c0008d4",
"name": "Sticky Note2",
"type": "n8n-nodes-base.stickyNote",
"position": [
640,
1058.6115582634225
],
"parameters": {
"width": 810.4923211935056,
"height": 224.60561166142082,
"content": "### Get all query google events for the next month and extract relevant data"
},
"typeVersion": 1
},
{
"id": "48bc7c0c-0b74-418e-8c5c-6a6faf24722c",
"name": "Sticky Note3",
"type": "n8n-nodes-base.stickyNote",
"position": [
1513,
1060
],
"parameters": {
"width": 444.4130232558142,
"height": 220.42397542781927,
"content": "### Wrap the result in `response` object and return "
},
"typeVersion": 1
},
{
"id": "a68f7b27-1891-46c7-92b2-650cc17f94d6",
"name": "Sort",
"type": "n8n-nodes-base.itemLists",
"position": [
1320,
1120
],
"parameters": {
"options": {},
"operation": "sort",
"sortFieldsUi": {
"sortField": [
{
"fieldName": "sort"
}
]
}
},
"typeVersion": 3
},
{
"id": "2b5b5855-6d3f-4405-9f48-5d6c4ee2475b",
"name": "Mark as read",
"type": "n8n-nodes-base.gmail",
"position": [
1840,
739
],
"parameters": {
"messageId": "={{ $('Gmail Trigger').item.json.id }}",
"operation": "markAsRead"
},
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"typeVersion": 2.1
},
{
"id": "accbe2df-367a-4bd3-a383-12ee79062e12",
"name": "Send Reply",
"type": "n8n-nodes-base.gmail",
"position": [
1840,
539
],
"parameters": {
"message": "={{ $json.output }}",
"options": {
"replyToSenderOnly": true
},
"messageId": "={{ $('Gmail Trigger').item.json.id }}",
"operation": "reply"
},
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"typeVersion": 2
},
{
"id": "66d62337-d0c1-4744-b169-8e95c1d1492a",
"name": "Agent",
"type": "@n8n/n8n-nodes-langchain.agent",
"position": [
1400,
539
],
"parameters": {
"text": "=Sender: {{ $('Gmail Trigger').item.json.From }}\\nSubject: {{ $('Gmail Trigger').item.json.Subject }}\\nEmail Text: {{ $('Gmail Trigger').item.json.snippet }}",
"options": {
"systemMessage": "=You are an email scheduling assistant. Based on the received email, check my availability and propose an appropriate response. \nAim to get a specific time, rather than just a day. When checking my availability, make sure that there's enough time in between meetings.\nIf I'm not available, ALWAYS propose a new time based on my availability. When proposing a new time, always leave 15 minutes buffer from previous meeting.\nToday date and time is: {{ $now.toISO() }}."
}
},
"typeVersion": 1
}
],
"connections": {
"Sort": {
"main": [
[
{
"node": "Format response",
"type": "main",
"index": 0
}
]
]
},
"Agent": {
"main": [
[
{
"node": "Send Reply",
"type": "main",
"index": 0
},
{
"node": "Mark as read",
"type": "main",
"index": 0
}
]
]
},
"Chat OpenAI": {
"ai_languageModel": [
[
{
"node": "Classify appointment",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Chat OpenAI1": {
"ai_languageModel": [
[
{
"node": "Agent",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Gmail Trigger": {
"main": [
[
{
"node": "Classify appointment",
"type": "main",
"index": 0
}
]
]
},
"Workflow Tool": {
"ai_tool": [
[
{
"node": "Agent",
"type": "ai_tool",
"index": 0
}
]
]
},
"Format response": {
"main": [
[
{
"node": "Stringify Response",
"type": "main",
"index": 0
}
]
]
},
"Google Calendar": {
"main": [
[
{
"node": "Filter only confirmed and with set time",
"type": "main",
"index": 0
}
]
]
},
"Classify appointment": {
"main": [
[
{
"node": "Is appointment request",
"type": "main",
"index": 0
}
]
]
},
"Is appointment request": {
"main": [
[
{
"node": "Agent",
"type": "main",
"index": 0
}
]
]
},
"Execute Workflow Trigger": {
"main": [
[
{
"node": "Google Calendar",
"type": "main",
"index": 0
}
]
]
},
"Structured Output Parser": {
"ai_outputParser": [
[
{
"node": "Classify appointment",
"type": "ai_outputParser",
"index": 0
}
]
]
},
"Extract start, end and name": {
"main": [
[
{
"node": "Sort",
"type": "main",
"index": 0
}
]
]
},
"Filter only confirmed and with set time": {
"main": [
[
{
"node": "Extract start, end and name",
"type": "main",
"index": 0
}
]
]
}
}
}
Credentials you'll need
Each integration node will prompt for credentials when you import. We strip credential IDs before publishing — you'll add your own.
gmailOAuth2googleCalendarOAuth2ApiopenAiApi
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How this works
Streamline your meeting scheduling by letting AI analyse incoming email requests and propose optimal time slots that suit your availability, saving hours of back-and-forth coordination. This workflow is ideal for busy professionals, managers, or teams handling frequent meeting invitations via Gmail, ensuring prompt and personalised responses without manual calendar checks. The key step involves the AI model from OpenAI interpreting the email content and cross-referencing it with your Google Calendar to generate tailored suggestions, seamlessly integrating both tools for efficient automation.
Use this workflow when you receive regular meeting requests through Gmail and want AI-driven proposals to maintain productivity, particularly in client-facing or collaborative roles. Avoid it for one-off events or if your calendar involves complex shared permissions that require human oversight, as it assumes straightforward availability checks. Common variations include adapting it for other email providers or adding follow-up notifications via Slack for team approvals.
About this workflow
Suggest Meeting Slots Using Ai. Uses gmailTrigger, lmChatOpenAi, toolWorkflow, stickyNote. Event-driven trigger; 21 nodes.
Source: https://github.com/Zie619/n8n-workflows — original creator credit. Request a take-down →
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