{ "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": "" } }, "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": "" } }, "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": "" } }, "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": "" } }, "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": "" } }, "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, '
') }}", "options": { "appendAttribution": false }, "subject": "=Re: {{ $json.Subject }}" }, "credentials": { "gmailOAuth2": { "name": "" } }, "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": "" } }, "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 } ] ] } } }