This workflow follows the Agent → OpenAI Chat 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 →
{
"name": "n8n Chat Demo (GitHub) copy",
"nodes": [
{
"parameters": {
"options": {}
},
"type": "n8n-nodes-base.respondToWebhook",
"typeVersion": 1.1,
"position": [
1300,
-120
],
"id": "b7caf2b6-a438-47d6-95cb-d423edcc5ee6",
"name": "Respond to Webhook"
},
{
"parameters": {},
"type": "n8n-nodes-base.merge",
"typeVersion": 3.1,
"position": [
460,
-120
],
"id": "4a0b1e1e-c6c1-454c-9cd1-ecefd5f9336e",
"name": "Merge"
},
{
"parameters": {
"options": {}
},
"type": "@n8n/n8n-nodes-langchain.agent",
"typeVersion": 1.8,
"position": [
680,
-120
],
"id": "ab7a8154-bb01-49f6-9629-a81a8eddd692",
"name": "AI Agent"
},
{
"parameters": {
"model": {
"__rl": true,
"value": "gpt-4o-mini",
"mode": "list",
"cachedResultName": "gpt-4o-mini"
},
"options": {}
},
"type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
"typeVersion": 1.2,
"position": [
680,
100
],
"id": "b2bdfe0f-a59c-463e-b8a9-cb56abfd5a28",
"name": "OpenAI Chat Model",
"credentials": {
"openAiApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"conditions": {
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "strict",
"version": 2
},
"conditions": [
{
"id": "5354b213-107d-4000-9f1f-cdf2614ea607",
"leftValue": "={{ $json.body }}",
"rightValue": "",
"operator": {
"type": "object",
"operation": "exists",
"singleValue": true
}
},
{
"id": "75209ef6-7649-41fc-a070-95783175a0d6",
"leftValue": "={{ $json.body.chatInput }}",
"rightValue": "",
"operator": {
"type": "string",
"operation": "exists",
"singleValue": true
}
}
],
"combinator": "and"
},
"options": {}
},
"type": "n8n-nodes-base.if",
"typeVersion": 2.2,
"position": [
-540,
-20
],
"id": "c9aa6824-e13a-4ace-b1d9-ae0118705d93",
"name": "Check if chatInput is set"
},
{
"parameters": {},
"type": "@n8n/n8n-nodes-langchain.memoryBufferWindow",
"typeVersion": 1.3,
"position": [
820,
100
],
"id": "ba90f182-b8c4-4b11-b02d-691625bd7107",
"name": "Simple Memory"
},
{
"parameters": {
"mode": "runOnceForEachItem",
"jsCode": "return {\n output: $json.output,\n sessionId: $('Merge').item.json.sessionId,\n};\n"
},
"type": "n8n-nodes-base.code",
"typeVersion": 2,
"position": [
1080,
-120
],
"id": "14bb742d-1dfc-4142-a1c0-870b952832fc",
"name": "Build response with sessionId"
},
{
"parameters": {
"httpMethod": "POST",
"path": "4af602f1-e8c7-4f0c-856b-e08623232897",
"responseMode": "responseNode",
"options": {}
},
"type": "n8n-nodes-base.webhook",
"typeVersion": 2,
"position": [
-780,
-20
],
"id": "e5ca41d9-4716-4ae9-8b85-01b7ff0e6537",
"name": "Webhook"
},
{
"parameters": {
"jsCode": "return $input.first().json.body;"
},
"type": "n8n-nodes-base.code",
"typeVersion": 2,
"position": [
-220,
-120
],
"id": "3833b6e3-759a-423a-8712-75463270c542",
"name": "Get \"body\""
},
{
"parameters": {
"options": {
"responseCode": 500
}
},
"type": "n8n-nodes-base.respondToWebhook",
"typeVersion": 1.1,
"position": [
-220,
80
],
"id": "c08e12ae-7f90-46c7-a212-e5e916e97847",
"name": "Error"
},
{
"parameters": {
"conditions": {
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "strict",
"version": 2
},
"conditions": [
{
"id": "75209ef6-7649-41fc-a070-95783175a0d6",
"leftValue": "={{ $json.sessionId }}",
"rightValue": "",
"operator": {
"type": "string",
"operation": "notEmpty",
"singleValue": true
}
}
],
"combinator": "and"
},
"options": {}
},
"type": "n8n-nodes-base.if",
"typeVersion": 2.2,
"position": [
20,
-120
],
"id": "99cea5a2-3800-4ffd-aef4-6a5ce6476df0",
"name": "Existing \"sessionId\"?"
},
{
"parameters": {
"action": "generate",
"dataPropertyName": "sessionId"
},
"type": "n8n-nodes-base.crypto",
"typeVersion": 1,
"position": [
240,
80
],
"id": "dc182701-3ab5-43a4-9cb3-605eacd57b96",
"name": "Generate sessionId"
}
],
"connections": {
"Merge": {
"main": [
[
{
"node": "AI Agent",
"type": "main",
"index": 0
}
]
]
},
"AI Agent": {
"main": [
[
{
"node": "Build response with sessionId",
"type": "main",
"index": 0
}
]
]
},
"OpenAI Chat Model": {
"ai_languageModel": [
[
{
"node": "AI Agent",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Check if chatInput is set": {
"main": [
[
{
"node": "Get \"body\"",
"type": "main",
"index": 0
}
],
[
{
"node": "Error",
"type": "main",
"index": 0
}
]
]
},
"Simple Memory": {
"ai_memory": [
[
{
"node": "AI Agent",
"type": "ai_memory",
"index": 0
}
]
]
},
"Build response with sessionId": {
"main": [
[
{
"node": "Respond to Webhook",
"type": "main",
"index": 0
}
]
]
},
"Webhook": {
"main": [
[
{
"node": "Check if chatInput is set",
"type": "main",
"index": 0
}
]
]
},
"Get \"body\"": {
"main": [
[
{
"node": "Existing \"sessionId\"?",
"type": "main",
"index": 0
}
]
]
},
"Existing \"sessionId\"?": {
"main": [
[
{
"node": "Merge",
"type": "main",
"index": 0
}
],
[
{
"node": "Generate sessionId",
"type": "main",
"index": 0
}
]
]
},
"Generate sessionId": {
"main": [
[
{
"node": "Merge",
"type": "main",
"index": 1
}
]
]
}
},
"active": false,
"settings": {
"executionOrder": "v1"
},
"versionId": "6f813a10-515b-4ce5-a8f4-8953ad0896b2",
"meta": {
"templateCredsSetupCompleted": true
},
"id": "U8YIj8ChjQkZV5wY",
"tags": []
}
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.
openAiApi
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About this workflow
n8n Chat Demo (GitHub) copy. Uses agent, lmChatOpenAi, memoryBufferWindow, crypto. Webhook trigger; 12 nodes.
Source: https://github.com/symbiosika/n8n-embedded-chat-interface/blob/20dd04395d893df444a9969bb456399cbc3fe1d5/examples/n8n/n8n_Chat_Demo.json — original creator credit. Request a take-down →
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