The workflow JSON
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{
"id": "Z5OgwYfK4reCTv9y",
"name": "LINE Assistant with Google Calendar and Gmail Integration",
"tags": [],
"nodes": [
{
"id": "9e1e1c11-f406-47de-8f65-9669cf078d3d",
"name": "AI Agent",
"type": "@n8n/n8n-nodes-langchain.agent",
"position": [
-1140,
120
],
"parameters": {
"text": "={{ $json.body.events[0].message.text }}",
"options": {
"systemMessage": "=You are a helpful assistant.\n\nHere is the current date {{ $now }}"
},
"promptType": "define"
},
"typeVersion": 1.7
},
{
"id": "fa722820-8804-47da-bb21-02c0d2b5d665",
"name": "Window Buffer Memory",
"type": "@n8n/n8n-nodes-langchain.memoryBufferWindow",
"position": [
-1020,
580
],
"parameters": {
"sessionKey": "={{ $json.body.events[0].source.userId }}",
"sessionIdType": "customKey"
},
"typeVersion": 1.3
},
{
"id": "5149b91a-5934-4037-a444-dfdb93d0cd16",
"name": "OpenAI Chat Model",
"type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
"position": [
-1180,
580
],
"parameters": {
"options": {}
},
"typeVersion": 1
},
{
"id": "211a120d-d65f-4708-adc2-66dc8f4a40d6",
"name": "Wikipedia",
"type": "@n8n/n8n-nodes-langchain.toolWikipedia",
"position": [
-360,
380
],
"parameters": {},
"typeVersion": 1
},
{
"id": "0e03137d-0300-47a4-bbd8-03c87c93d6e2",
"name": "OpenAI",
"type": "@n8n/n8n-nodes-langchain.openAi",
"position": [
-780,
120
],
"parameters": {
"modelId": {
"__rl": true,
"mode": "list",
"value": "gpt-4o-mini",
"cachedResultName": "GPT-4O-MINI"
},
"options": {},
"messages": {
"values": [
{
"role": "system",
"content": "Your task is to extract and condense the answer into an easily readable format. Don't provide a link or details such as \"\u0e14\u0e39\u0e40\u0e1e\u0e34\u0e48\u0e21\u0e40\u0e15\u0e34\u0e21\" or \"\u0e14\u0e39\u0e23\u0e32\u0e22\u0e25\u0e30\u0e40\u0e2d\u0e35\u0e22\u0e14\u0e44\u0e14\u0e49\u0e17\u0e35\u0e48\u0e19\u0e35\u0e48.\""
},
{
"content": "={{ $json.output }}"
}
]
}
},
"typeVersion": 1.7
},
{
"id": "8c6e96bc-aa9d-44d1-b7ce-6bb85b175cf1",
"name": "Switch Between Text and Others",
"type": "n8n-nodes-base.switch",
"position": [
-1820,
640
],
"parameters": {
"rules": {
"values": [
{
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"operator": {
"type": "string",
"operation": "equals"
},
"leftValue": "={{ $('Line Receiving').item.json.body.events[0].message.type }}",
"rightValue": "text"
}
]
}
}
]
},
"options": {
"fallbackOutput": "extra"
}
},
"typeVersion": 3.2
},
{
"id": "721a5e5e-3a9a-435e-9302-03ca7cf64fb7",
"name": "Line Receiving",
"type": "n8n-nodes-base.webhook",
"position": [
-2320,
560
],
"parameters": {
"path": "linechatbotagent",
"options": {},
"httpMethod": "POST"
},
"typeVersion": 2
},
{
"id": "2b47f8f1-a501-4204-9221-c838edfceae7",
"name": "Error Handling from AI Response",
"type": "n8n-nodes-base.switch",
"position": [
-220,
100
],
"parameters": {
"rules": {
"values": [
{
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"operator": {
"type": "string",
"operation": "exists",
"singleValue": true
},
"leftValue": "={{ $json.message.content }}",
"rightValue": "={{ $json.output }}"
}
]
}
}
]
},
"options": {
"fallbackOutput": "extra"
}
},
"typeVersion": 3.2
},
{
"id": "99218c08-5ec7-44b9-a795-e98f1ec4aab3",
"name": "Text Cleansing",
"type": "n8n-nodes-base.set",
"position": [
0,
0
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "********-****-****-****-************",
"name": "message.content",
"type": "string",
"value": "={{ $json.message.content.replaceAll(\"\\n\",\"\\\\n\").replaceAll(\"\\n\",\"\").removeMarkdown().removeTags().replaceAll('\"',\"\") }}"
}
]
}
},
"typeVersion": 3.4
},
{
"id": "39476f44-9dc7-4c72-a857-9e79f85ccd72",
"name": "Line Answering (Error Case)",
"type": "n8n-nodes-base.httpRequest",
"position": [
760,
680
],
"parameters": {
"url": "https://api.line.me/v2/bot/message/reply",
"method": "POST",
"options": {},
"jsonBody": "={\n \"replyToken\": \"{{ $('Line Receiving').item.json.body.events[0].replyToken }}\",\n \"messages\": [\n {\n \"type\": \"text\",\n \"text\": \"\u0e01\u0e23\u0e38\u0e13\u0e32\u0e2a\u0e48\u0e07\u0e2d\u0e22\u0e48\u0e32\u0e07\u0e2d\u0e37\u0e48\u0e19\u0e40\u0e16\u0e2d\u0e30\u0e19\u0e30\u0e40\u0e15\u0e07\u0e2d\u0e31\u0e27\"\n }\n ]}",
"sendBody": true,
"jsonHeaders": "{\n\"Authorization\": \"Bearer ****************************************\",\n\"Content-Type\": \"application/json\"\n}",
"sendHeaders": true,
"specifyBody": "json",
"specifyHeaders": "json"
},
"typeVersion": 4.2
},
{
"id": "a7f8837d-c21b-457d-ad8b-b0b69e3c1ba7",
"name": "Line Answering (Ordinary Case)",
"type": "n8n-nodes-base.httpRequest",
"position": [
600,
120
],
"parameters": {
"url": "https://api.line.me/v2/bot/message/reply",
"method": "POST",
"options": {},
"jsonBody": "={\n \"replyToken\": \"{{ $('Line Receiving').item.json.body.events[0].replyToken }}\",\n \"messages\": [\n {\n \"type\": \"text\",\n \"text\": \"{{ $json.message.content }}\"\n }\n ]}",
"sendBody": true,
"jsonHeaders": "{\n\"Authorization\": \"Bearer ****************************************\",\n\"Content-Type\": \"application/json\"\n}",
"sendHeaders": true,
"specifyBody": "json",
"specifyHeaders": "json"
},
"typeVersion": 4.2
},
{
"id": "3280f331-0130-41c2-a581-14feccf76514",
"name": "Google Calendar Create",
"type": "n8n-nodes-base.googleCalendarTool",
"position": [
-640,
400
],
"parameters": {
"end": "= {{ $fromAI(\"createenddate\",\"end date and time to create event\") }}",
"start": "= {{ $fromAI(\"createstartdate\",\"start date and time to create event\") }}",
"calendar": {
"__rl": true,
"mode": "list",
"value": "***********@gmail.com",
"cachedResultName": "***********@gmail.com"
},
"additionalFields": {
"summary": "={{ $fromAI(\"event_name\",\"Name of an Event\") }}"
}
},
"credentials": {
"googleCalendarOAuth2Api": {
"name": "<your credential>"
}
},
"typeVersion": 1.2
},
{
"id": "7701895f-9781-41b9-aa80-8440e4e9cbd3",
"name": "Google Calendar Read",
"type": "n8n-nodes-base.googleCalendarTool",
"position": [
-880,
580
],
"parameters": {
"limit": 5,
"options": {
"timeMax": "={{ $fromAI(\"enddate\",\"end date user mentioned about\") }}",
"timeMin": "={{ $fromAI(\"startdate\",\"start date user mentioned about\") }}"
},
"calendar": {
"__rl": true,
"mode": "list",
"value": "***********@gmail.com",
"cachedResultName": "***********@gmail.com"
},
"operation": "getAll"
},
"credentials": {
"googleCalendarOAuth2Api": {
"name": "<your credential>"
}
},
"typeVersion": 1.2
},
{
"id": "881daa7f-cf9a-4d1f-8235-55d206925ac0",
"name": "Gmail Read",
"type": "n8n-nodes-base.gmailTool",
"position": [
-700,
560
],
"parameters": {
"limit": 5,
"filters": {
"receivedAfter": "={{ $fromAI(\"receiveddate\",\"the date email received\") }}"
},
"operation": "getAll"
},
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"typeVersion": 2.1
}
],
"active": false,
"settings": {
"executionOrder": "v1"
},
"versionId": "14065639-6706-4161-9380-4f4dde6eb501",
"connections": {
"OpenAI": {
"main": [
[
{
"node": "Error Handling from AI Response",
"type": "main",
"index": 0
}
]
]
},
"AI Agent": {
"main": [
[
{
"node": "OpenAI",
"type": "main",
"index": 0
}
]
]
},
"Wikipedia": {
"ai_tool": [
[
{
"node": "AI Agent",
"type": "ai_tool",
"index": 0
}
]
]
},
"Gmail Read": {
"ai_tool": [
[
{
"node": "AI Agent",
"type": "ai_tool",
"index": 0
}
]
]
},
"Line Receiving": {
"main": [
[
{
"node": "Switch Between Text and Others",
"type": "main",
"index": 0
}
]
]
},
"Text Cleansing": {
"main": [
[
{
"node": "Line Answering (Ordinary Case)",
"type": "main",
"index": 0
}
]
]
},
"OpenAI Chat Model": {
"ai_languageModel": [
[
{
"node": "AI Agent",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Google Calendar Read": {
"ai_tool": [
[
{
"node": "AI Agent",
"type": "ai_tool",
"index": 0
}
]
]
},
"Window Buffer Memory": {
"ai_memory": [
[
{
"node": "AI Agent",
"type": "ai_memory",
"index": 0
}
]
]
},
"Google Calendar Create": {
"ai_tool": [
[
{
"node": "AI Agent",
"type": "ai_tool",
"index": 0
}
]
]
},
"Switch Between Text and Others": {
"main": [
[
{
"node": "AI Agent",
"type": "main",
"index": 0
}
],
[
{
"node": "Line Answering (Error Case)",
"type": "main",
"index": 0
}
]
]
},
"Error Handling from AI Response": {
"main": [
[
{
"node": "Text Cleansing",
"type": "main",
"index": 0
}
],
[
{
"node": "Line Answering (Error Case)",
"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.
gmailOAuth2googleCalendarOAuth2Api
About this workflow
LINE Assistant with Google Calendar and Gmail Integration. Uses agent, memoryBufferWindow, lmChatOpenAi, toolWikipedia. Webhook trigger; 14 nodes.
Source: https://github.com/Zie619/n8n-workflows — original creator credit. Request a take-down →