Emilio Loewenstein This workflow corresponds to n8n.io template #9414 — we link there as the canonical source.
This workflow follows the Agent → OpenAI Embeddings 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 →
{
"id": "CUKGI0izi0AiPcTi",
"meta": {
"templateCredsSetupCompleted": true
},
"name": "Customer Support Workflow",
"tags": [],
"nodes": [
{
"id": "c21b53e9-1422-4be5-b8aa-e6c9fe2f2ed4",
"name": "Gmail Trigger",
"type": "n8n-nodes-base.gmailTrigger",
"position": [
-48,
240
],
"parameters": {
"simple": false,
"filters": {},
"options": {},
"pollTimes": {
"item": [
{
"mode": "everyMinute"
}
]
}
},
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"typeVersion": 1.2
},
{
"id": "4ac4150d-8d4c-4d19-a4e9-9b4ad2bf6805",
"name": "Text Classifier",
"type": "@n8n/n8n-nodes-langchain.textClassifier",
"position": [
160,
240
],
"parameters": {
"options": {},
"inputText": "={{ $json.text }}",
"categories": {
"categories": [
{
"category": "Customer Support ",
"description": "An email that is related to helping out a costumer. They may be asking questions about our policies or questions or questions about our products or services. Adding to that A customer email typically includes a greeting, a clear question or problem, relevant details like an order number or account information, and a polite closing. It is written in natural language and usually asks for help, information, or action.\n\nHere is an Example: \n\nSubject: Issue with My Recent Order\n\nHi there,\n\nI placed an order (#12345) last week, but I haven\u2019t received a shipping confirmation yet. Can you please check the status for me?\n\nThanks in advance!\n\nBest,\nJohn Doe\n"
},
{
"category": "Other ",
"description": "Any email that is not Costumer Support related "
}
]
}
},
"typeVersion": 1.1
},
{
"id": "a141facb-644c-4d19-8fdc-44a17d9ee330",
"name": "OpenRouter Chat Model",
"type": "@n8n/n8n-nodes-langchain.lmChatOpenRouter",
"position": [
272,
656
],
"parameters": {
"options": {}
},
"credentials": {
"openRouterApi": {
"name": "<your credential>"
}
},
"typeVersion": 1
},
{
"id": "b6e7d92c-fe48-4790-bb13-11242097a67e",
"name": "No Operation, do nothing",
"type": "n8n-nodes-base.noOp",
"position": [
608,
416
],
"parameters": {},
"typeVersion": 1
},
{
"id": "a279b9cc-00ff-4a81-b98e-139b77d960f0",
"name": "AI Agent",
"type": "@n8n/n8n-nodes-langchain.agent",
"position": [
560,
32
],
"parameters": {
"text": "={{ $('Gmail Trigger').item.json.text }}",
"options": {
"systemMessage": "=# Overview \nYou are a customer support agent for Tech Haven. Your job is to respond to incoming emails with relevant information using your knowledgeBase tool. \n\n# Instructions \n- Your output should be friendly and give as detailed information as possbile \n- Sign off as Mrs. Helpful from Tech Haven Solutions \n\n## Output \n- Output only the body content of the email "
},
"promptType": "define"
},
"typeVersion": 2.1
},
{
"id": "2f763a56-7c2d-4317-9df2-cb38d2176b9f",
"name": "OpenRouter Chat Model1",
"type": "@n8n/n8n-nodes-langchain.lmChatOpenRouter",
"position": [
560,
224
],
"parameters": {
"model": "google/gemini-2.0-flash-001",
"options": {}
},
"credentials": {
"openRouterApi": {
"name": "<your credential>"
}
},
"typeVersion": 1
},
{
"id": "f8d50a89-7a5c-4088-861c-ce238e42e908",
"name": "knowledgeBase",
"type": "@n8n/n8n-nodes-langchain.vectorStorePinecone",
"position": [
864,
272
],
"parameters": {
"mode": "retrieve-as-tool",
"options": {
"pineconeNamespace": "FAQ"
},
"pineconeIndex": {
"__rl": true,
"mode": "list",
"value": "sample",
"cachedResultName": "sample"
},
"toolDescription": "Name: knowledgeBase\n\nCall this tool to [your Database] information"
},
"credentials": {
"pineconeApi": {
"name": "<your credential>"
}
},
"typeVersion": 1.3
},
{
"id": "5c4edd48-ac92-4a2a-8261-40ecbe322df6",
"name": "Embeddings OpenAI",
"type": "@n8n/n8n-nodes-langchain.embeddingsOpenAi",
"position": [
960,
432
],
"parameters": {
"options": {}
},
"credentials": {
"openAiApi": {
"name": "<your credential>"
}
},
"typeVersion": 1.2
},
{
"id": "e3b08b15-3e88-407c-91bb-1bef981acf48",
"name": "Reply to a message",
"type": "n8n-nodes-base.gmail",
"position": [
1072,
32
],
"parameters": {
"message": "={{ $json.output }}",
"options": {
"appendAttribution": false
},
"emailType": "text",
"messageId": "={{ $('Gmail Trigger').item.json.id }}",
"operation": "reply"
},
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"typeVersion": 2.1
},
{
"id": "93fe6d9e-3c6b-4980-a003-35cb603e7099",
"name": "Sticky Note",
"type": "n8n-nodes-base.stickyNote",
"position": [
-304,
-48
],
"parameters": {
"width": 400,
"height": 592,
"content": "## Gmail Trigger \n- How it Works: Listens for new incoming Gmail messages in real time.\n- Value: Automatically pulls new customer emails into the workflow without manual checking.\n- Credentials: Connect your Gmail account using Gmail OAuth2.\n"
},
"typeVersion": 1
},
{
"id": "af395655-6228-4838-8aee-2bcba241dca0",
"name": "Sticky Note1",
"type": "n8n-nodes-base.stickyNote",
"position": [
112,
-48
],
"parameters": {
"color": 2,
"width": 288,
"height": 592,
"content": "## Text Classifier\n- How it Works: Uses AI to classify emails into Customer Support or Other.\n- Value: Ensures only relevant customer support emails get a response.\n- Credentials: None required (uses built-in LangChain classifier)."
},
"typeVersion": 1
},
{
"id": "3048d5d3-b301-4a79-a3ac-39bd57f99e10",
"name": "Sticky Note2",
"type": "n8n-nodes-base.stickyNote",
"position": [
-304,
560
],
"parameters": {
"color": 3,
"width": 704,
"height": 256,
"content": "## OpenRouter Chat Model \n- How it Works: Provides AI-powered text generation for classification and responses.\n- Value: Enhances classification and helps prepare structured input for the agent.\n- Credentials: Connect your OpenRouter API key."
},
"typeVersion": 1
},
{
"id": "473c68ec-f0b0-4a2a-86ca-1abc25fa01e9",
"name": "Sticky Note3",
"type": "n8n-nodes-base.stickyNote",
"position": [
448,
-208
],
"parameters": {
"color": 4,
"width": 464,
"height": 208,
"content": "## AI Agent \n- How it Works: Acts as a virtual support agent. It takes customer emails, retrieves policy/FAQ info, and drafts a helpful reply.\n- Value: Saves time by providing accurate, personalized, and friendly responses automatically.\n- Credentials: Requires OpenRouter API and connection to Pinecone knowledge base."
},
"typeVersion": 1
},
{
"id": "8ea803ef-4f38-4611-928e-fb3ddd833f45",
"name": "Sticky Note4",
"type": "n8n-nodes-base.stickyNote",
"position": [
1152,
272
],
"parameters": {
"width": 288,
"height": 320,
"content": "## KnowledgeBase \n- How it Works: Stores and retrieves your Database information.\n- Value: Ensures responses are consistent and based on verified knowledge.\n- Credentials: Connect your Pinecone API credentials."
},
"typeVersion": 1
},
{
"id": "540a4355-c133-488b-b5c3-8b53a9417379",
"name": "Sticky Note5",
"type": "n8n-nodes-base.stickyNote",
"position": [
880,
608
],
"parameters": {
"color": 6,
"width": 560,
"height": 208,
"content": "## Embeddings (OpenAI)\n- How it Works: Converts FAQ text into embeddings so the AI can search and retrieve relevant information.\n- Value: Improves accuracy of answers by grounding responses in real data.\n- Credentials: Connect your OpenAI API key."
},
"typeVersion": 1
}
],
"active": false,
"settings": {
"executionOrder": "v1"
},
"versionId": "72b878a4-7173-40ae-952e-999765d1728a",
"connections": {
"AI Agent": {
"main": [
[
{
"node": "Reply to a message",
"type": "main",
"index": 0
}
]
]
},
"Gmail Trigger": {
"main": [
[
{
"node": "Text Classifier",
"type": "main",
"index": 0
}
]
]
},
"knowledgeBase": {
"ai_tool": [
[
{
"node": "AI Agent",
"type": "ai_tool",
"index": 0
}
]
]
},
"Text Classifier": {
"main": [
[
{
"node": "AI Agent",
"type": "main",
"index": 0
}
],
[
{
"node": "No Operation, do nothing",
"type": "main",
"index": 0
}
]
]
},
"Embeddings OpenAI": {
"ai_embedding": [
[
{
"node": "knowledgeBase",
"type": "ai_embedding",
"index": 0
}
]
]
},
"OpenRouter Chat Model": {
"ai_languageModel": [
[
{
"node": "Text Classifier",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"OpenRouter Chat Model1": {
"ai_languageModel": [
[
{
"node": "AI Agent",
"type": "ai_languageModel",
"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.
gmailOAuth2openAiApiopenRouterApipineconeApi
Pro
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About this workflow
This workflow automates customer email support by combining Gmail, AI classification, and a knowledge base to provide instant, accurate, and friendly responses. It’s designed for businesses that want to improve customer satisfaction while reducing manual workload. Gmail Trigger…
Source: https://n8n.io/workflows/9414/ — original creator credit. Request a take-down →
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