George Dan This workflow corresponds to n8n.io template #14038 — we link there as the canonical source.
This workflow follows the Chainllm → Gmail 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": "iL5oeTgdrcA1avtP",
"name": "AI Customer Support Email Agent with Gmail and Google Sheets",
"tags": [],
"nodes": [
{
"id": "a34946c2-efe9-4c43-af40-571ec70da65e",
"name": "Receive Customer Emails",
"type": "n8n-nodes-base.gmailTrigger",
"position": [
160,
208
],
"parameters": {
"simple": false,
"filters": {},
"options": {},
"pollTimes": {
"item": [
{
"mode": "everyMinute"
}
]
}
},
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"typeVersion": 1.3
},
{
"id": "8e95a8dd-eb83-4d0c-8daf-dde14f34afed",
"name": "Filter Unwanted Emails",
"type": "n8n-nodes-base.if",
"position": [
368,
208
],
"parameters": {
"options": {},
"conditions": {
"options": {
"version": 3,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "cond1",
"operator": {
"type": "string",
"operation": "notContains"
},
"leftValue": "={{ $json.from.value[0].address }}",
"rightValue": "user@example.com"
},
{
"id": "c1",
"operator": {
"type": "string",
"operation": "notContains"
},
"leftValue": "={{ $json.from.value[0].address }}",
"rightValue": "noreply"
},
{
"id": "c2",
"operator": {
"type": "string",
"operation": "notContains"
},
"leftValue": "={{ $json.from.value[0].address }}",
"rightValue": "no-reply"
},
{
"id": "c3",
"operator": {
"type": "string",
"operation": "notContains"
},
"leftValue": "={{ $json.from.value[0].address }}",
"rightValue": "mailer-daemon"
},
{
"id": "c4",
"operator": {
"type": "string",
"operation": "notContains"
},
"leftValue": "={{ $json.subject }}",
"rightValue": "out of office"
},
{
"id": "c5",
"operator": {
"type": "string",
"operation": "notContains"
},
"leftValue": "={{ $json.subject }}",
"rightValue": "auto-reply"
},
{
"id": "c6",
"operator": {
"type": "string",
"operation": "notContains"
},
"leftValue": "={{ $json.subject }}",
"rightValue": "automatic reply"
},
{
"id": "c7",
"operator": {
"type": "string",
"operation": "notContains"
},
"leftValue": "={{ $json.subject }}",
"rightValue": "delivery notification"
},
{
"id": "c8",
"operator": {
"type": "string",
"operation": "notContains"
},
"leftValue": "={{ $json.subject }}",
"rightValue": "undeliverable"
},
{
"id": "c9",
"operator": {
"type": "string",
"operation": "notContains"
},
"leftValue": "={{ $json.subject }}",
"rightValue": "newsletter"
},
{
"id": "c10",
"operator": {
"type": "string",
"operation": "notContains"
},
"leftValue": "={{ $json.subject }}",
"rightValue": "unsubscribe"
}
]
}
},
"typeVersion": 2.3
},
{
"id": "05bc6007-08b2-4a16-838f-c1e40697bf9e",
"name": "Draft AI Reply",
"type": "@n8n/n8n-nodes-langchain.chainLlm",
"position": [
624,
192
],
"parameters": {
"text": "=From: {{ $('Receive Customer Emails').item.json.from }}\nSubject: {{ $('Receive Customer Emails').item.json.subject }}\n\n{{ $('Receive Customer Emails').item.json.text }}",
"batching": {},
"messages": {
"messageValues": [
{
"message": "You are a support agent for Your Company Name Here\n\n## Company Documentation\nWe offer a 12-month warranty.\nCopy/paste your customer support info here.\n\n## Instructions\n- Read the customer's email carefully.\n- Identify their question or issue.\n- Draft a clear, helpful, professional reply that directly answers their question using the documentation above.\n- Do not make up information not in the documentation. If you don't know, say so politely and offer to escalate.\n- Sign off as \"Support Team\".\n- Output ONLY the email body text, no subject line."
}
]
},
"promptType": "define"
},
"typeVersion": 1.9
},
{
"id": "cbdf0ba9-5736-409c-9db1-16967f83def4",
"name": "OpenRouter Model",
"type": "@n8n/n8n-nodes-langchain.lmChatOpenRouter",
"position": [
624,
400
],
"parameters": {
"options": {}
},
"credentials": {
"openRouterApi": {
"name": "<your credential>"
}
},
"typeVersion": 1
},
{
"id": "9a2050f3-3f2f-45e2-98a1-e09f80b483d5",
"name": "Mark Email as Read",
"type": "n8n-nodes-base.gmail",
"position": [
976,
192
],
"parameters": {
"messageId": "={{ $('Receive Customer Emails').item.json.id }}",
"operation": "markAsRead"
},
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"typeVersion": 2.2
},
{
"id": "74dcc027-fcdd-4f1e-9774-8ac3d751aca5",
"name": "Log to Google Sheets",
"type": "n8n-nodes-base.googleSheets",
"position": [
1200,
192
],
"parameters": {
"columns": {
"value": {
"Body": "={{ $('Receive Customer Emails').item.json.text }}",
"From": "={{ $('Receive Customer Emails').item.json.from.value[0].address }}",
"Reply": "={{ $('Draft AI Reply').item.json.text }}",
"Subject": "={{ $('Receive Customer Emails').item.json.subject }}",
"Message ID": "={{ $('Receive Customer Emails').item.json.id }}"
},
"schema": [
{
"id": "Message ID",
"type": "string",
"display": true,
"required": false,
"displayName": "Message ID",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "From",
"type": "string",
"display": true,
"required": false,
"displayName": "From",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Subject",
"type": "string",
"display": true,
"required": false,
"displayName": "Subject",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Body",
"type": "string",
"display": true,
"required": false,
"displayName": "Body",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Reply",
"type": "string",
"display": true,
"required": false,
"displayName": "Reply",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Send",
"type": "string",
"display": true,
"required": false,
"displayName": "Send",
"defaultMatch": false,
"canBeUsedToMatch": true
}
],
"mappingMode": "defineBelow",
"matchingColumns": [],
"attemptToConvertTypes": false,
"convertFieldsToString": false
},
"options": {},
"operation": "append",
"sheetName": {
"__rl": true,
"mode": "list",
"value": "gid=0",
"cachedResultUrl": "https://docs.google.com/spreadsheets/d/1P_loYpUly294lsvmBfJcMZJfMWX7kDWXnKwmUp1EKTc/edit#gid=0",
"cachedResultName": "Sheet1"
},
"documentId": {
"__rl": true,
"mode": "list",
"value": "1Behqx-A6IROp22XJ92DDoDUP4SOEl6JZIq4OpnBWsBo",
"cachedResultUrl": "https://docs.google.com/spreadsheets/d/1Behqx-A6IROp22XJ92DDoDUP4SOEl6JZIq4OpnBWsBo/edit?usp=drivesdk",
"cachedResultName": "Customer Support Emails"
}
},
"credentials": {
"googleSheetsOAuth2Api": {
"name": "<your credential>"
}
},
"typeVersion": 4.7
},
{
"id": "cd0b7884-435f-4a5b-98a5-9f7128924875",
"name": "Check Pending Replies",
"type": "n8n-nodes-base.scheduleTrigger",
"position": [
176,
736
],
"parameters": {
"rule": {
"interval": [
{
"field": "minutes",
"minutesInterval": 1
}
]
}
},
"typeVersion": 1.3
},
{
"id": "dccb0769-54fe-4548-9051-413f90847f3d",
"name": "Get Approved Replies",
"type": "n8n-nodes-base.googleSheets",
"position": [
400,
736
],
"parameters": {
"options": {},
"filtersUI": {
"values": [
{
"lookupValue": "send",
"lookupColumn": "Send"
}
]
},
"sheetName": {
"__rl": true,
"mode": "list",
"value": "gid=0",
"cachedResultUrl": "https://docs.google.com/spreadsheets/d/1Behqx-A6IROp22XJ92DDoDUP4SOEl6JZIq4OpnBWsBo/edit#gid=0",
"cachedResultName": "Sheet1"
},
"documentId": {
"__rl": true,
"mode": "list",
"value": "1Behqx-A6IROp22XJ92DDoDUP4SOEl6JZIq4OpnBWsBo",
"cachedResultUrl": "https://docs.google.com/spreadsheets/d/1Behqx-A6IROp22XJ92DDoDUP4SOEl6JZIq4OpnBWsBo/edit?usp=drivesdk",
"cachedResultName": "Customer Support Emails"
}
},
"credentials": {
"googleSheetsOAuth2Api": {
"name": "<your credential>"
}
},
"typeVersion": 4.7
},
{
"id": "d6c2381a-b6fe-4805-9db7-782594e84847",
"name": "Send Reply to Customer",
"type": "n8n-nodes-base.gmail",
"position": [
896,
720
],
"parameters": {
"sendTo": "={{ $json.From }}",
"message": "={{ $json.Reply.replace(/\\n/g, '<br>') }}",
"options": {
"appendAttribution": false
},
"subject": "=Re: {{ $json.Subject }}"
},
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"typeVersion": 2.2
},
{
"id": "57e91e89-f103-4546-a250-c5221254e1d2",
"name": "Update Status to Replied",
"type": "n8n-nodes-base.googleSheets",
"position": [
1168,
720
],
"parameters": {
"columns": {
"value": {
"Send": "Replied",
"Message ID": "={{ $('Is Approved to Send?').item.json['Message ID'] }}"
},
"schema": [
{
"id": "Message ID",
"type": "string",
"display": true,
"required": false,
"displayName": "Message ID",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "From",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "From",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Subject",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "Subject",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Body",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "Body",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Reply",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "Reply",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Send",
"type": "string",
"display": true,
"required": false,
"displayName": "Send",
"defaultMatch": false,
"canBeUsedToMatch": true
}
],
"mappingMode": "defineBelow",
"matchingColumns": [
"Message ID"
],
"attemptToConvertTypes": false,
"convertFieldsToString": false
},
"options": {},
"operation": "appendOrUpdate",
"sheetName": {
"__rl": true,
"mode": "list",
"value": "gid=0",
"cachedResultUrl": "https://docs.google.com/spreadsheets/d/1P_loYpUly294lsvmBfJcMZJfMWX7kDWXnKwmUp1EKTc/edit#gid=0",
"cachedResultName": "Sheet1"
},
"documentId": {
"__rl": true,
"mode": "list",
"value": "1Behqx-A6IROp22XJ92DDoDUP4SOEl6JZIq4OpnBWsBo",
"cachedResultUrl": "https://docs.google.com/spreadsheets/d/1Behqx-A6IROp22XJ92DDoDUP4SOEl6JZIq4OpnBWsBo/edit?usp=drivesdk",
"cachedResultName": "Customer Support Emails"
}
},
"credentials": {
"googleSheetsOAuth2Api": {
"name": "<your credential>"
}
},
"typeVersion": 4.7
},
{
"id": "134d964e-705b-41d3-af41-9dca6852f59b",
"name": "Is Approved to Send?",
"type": "n8n-nodes-base.if",
"position": [
640,
736
],
"parameters": {
"options": {},
"conditions": {
"options": {
"version": 3,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "or",
"conditions": [
{
"id": "c1",
"operator": {
"type": "string",
"operation": "equals"
},
"leftValue": "={{ $json.Send }}",
"rightValue": "send"
}
]
}
},
"typeVersion": 2.3
},
{
"id": "3da05e07-7a32-48db-8a4f-42ea5f936ce4",
"name": "Overview",
"type": "n8n-nodes-base.stickyNote",
"position": [
-784,
-32
],
"parameters": {
"color": 5,
"width": 796,
"height": 1184,
"content": "## \ud83d\udce7 AI Customer Support Email Agent\n\n**Automatically draft AI-powered replies to customer emails, let your team review them in Google Sheets, and send with a single word - keeping a human in the loop.**\n\n---\n\n### Who is this for\n- Small business owners handling customer support manually\n- Support teams that want AI assistance without losing human oversight\n- Freelancers and agencies managing client email inquiries\n\n---\n\n### How it works\n1. **Gmail** is monitored every minute for new incoming emails\n2. **Smart filtering** skips automated emails, newsletters, noreply senders, and out-of-office replies\n3. **AI (via OpenRouter)** drafts a reply using your company documentation as context\n4. The email and draft reply are **logged to Google Sheets** for review\n5. Your team **reviews the draft** - type \"send\" in the Send column to approve\n6. Every minute, the workflow **detects approved rows** and sends the reply via Gmail\n7. The row is **updated to \"Replied\"** to prevent duplicate sends\n\n---\n\n### Knowledge base\nYour company documentation is embedded **directly in the AI system prompt** - no vector database, no RAG pipeline, no extra infrastructure.\n\n**Advantages:**\n- Zero-setup knowledge base - paste your docs and go\n- Works with any OpenRouter model out of the box\n- Instant updates - edit the prompt, changes apply immediately\n- No hallucinations beyond what's in the prompt (the AI is instructed to escalate if unsure)\n\n**Practical limits:**\n- Up to ~10 pages (~3,000 words) works reliably with any model\n- Up to 50+ pages with large-context models (GPT-4 Turbo, Claude 3.5 Sonnet, Llama 3.1 70B and newer versions)\n- Beyond that, consider a RAG-based approach with a vector store\n\n---\n\n### Setup\n1. **Gmail** - Connect your Gmail OAuth2 account to the Receive Customer Emails, Mark Email as Read, and Send Reply to Customer nodes\n2. **OpenRouter** - Add your OpenRouter API key to the OpenRouter Model node\n3. **Google Sheets** - Connect your Google Sheets OAuth2 account to all sheet nodes; create a sheet with columns: Message ID, From, Subject, Body, Reply, Send\n4. In the **Draft AI Reply** node, update the system prompt with your own company documentation and business name\n5. In the **Filter Unwanted Emails** node, update the first condition to exclude your own email address\n6. Activate the workflow"
},
"typeVersion": 1
},
{
"id": "1e210314-18c0-4c9c-a03b-0e84dc06b34c",
"name": "Section - Email Intake",
"type": "n8n-nodes-base.stickyNote",
"position": [
80,
64
],
"parameters": {
"color": 5,
"width": 1380,
"height": 476,
"content": "## \u2460 Email Intake & AI Draft\nReceives incoming emails, filters noise, drafts AI replies, and logs everything to Google Sheets for review."
},
"typeVersion": 1
},
{
"id": "680b871c-35de-4191-b6e9-d5fb8168c947",
"name": "Section - Review and Send",
"type": "n8n-nodes-base.stickyNote",
"position": [
96,
624
],
"parameters": {
"color": 0,
"width": 1320,
"height": 268,
"content": "## \u2461 Review & Send Approved Replies\nChecks Google Sheets every minute for rows marked \"send\" and delivers the approved reply to the customer."
},
"typeVersion": 1
}
],
"active": false,
"settings": {
"callerPolicy": "workflowsFromSameOwner",
"availableInMCP": false,
"executionOrder": "v1"
},
"versionId": "b567fb26-b0d4-4ddb-8df2-dfeb1b4e3ae4",
"connections": {
"Draft AI Reply": {
"main": [
[
{
"node": "Mark Email as Read",
"type": "main",
"index": 0
}
]
]
},
"OpenRouter Model": {
"ai_languageModel": [
[
{
"node": "Draft AI Reply",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Mark Email as Read": {
"main": [
[
{
"node": "Log to Google Sheets",
"type": "main",
"index": 0
}
]
]
},
"Get Approved Replies": {
"main": [
[
{
"node": "Is Approved to Send?",
"type": "main",
"index": 0
}
]
]
},
"Is Approved to Send?": {
"main": [
[
{
"node": "Send Reply to Customer",
"type": "main",
"index": 0
}
],
[]
]
},
"Check Pending Replies": {
"main": [
[
{
"node": "Get Approved Replies",
"type": "main",
"index": 0
}
]
]
},
"Filter Unwanted Emails": {
"main": [
[
{
"node": "Draft AI Reply",
"type": "main",
"index": 0
}
],
[]
]
},
"Send Reply to Customer": {
"main": [
[
{
"node": "Update Status to Replied",
"type": "main",
"index": 0
}
]
]
},
"Receive Customer Emails": {
"main": [
[
{
"node": "Filter Unwanted Emails",
"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.
gmailOAuth2googleSheetsOAuth2ApiopenRouterApi
Pro
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About this workflow
Gmail is monitored every minute for new incoming emails Automated and irrelevant emails are filtered out (newsletters, noreply senders, out-of-office replies, bounce notifications) AI reads the email and drafts a reply based on your company documentation - embedded directly in…
Source: https://n8n.io/workflows/14038/ — original creator credit. Request a take-down →
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