{ "id": "6MZqIrk7nB6lc4vB", "meta": { "templateCredsSetupCompleted": true }, "name": "Gmail Auto Reply & Categorization with AI", "tags": [], "nodes": [ { "id": "9f88a550-a517-4362-a71f-b7997b9c75fa", "name": "Gmail Trigger", "type": "n8n-nodes-base.gmailTrigger", "position": [ -272, 0 ], "parameters": { "simple": false, "filters": {}, "options": {}, "pollTimes": { "item": [ { "mode": "everyMinute" } ] } }, "credentials": { "gmailOAuth2": { "name": "" } }, "typeVersion": 1.2 }, { "id": "faf382e9-f898-447f-b5a1-d7a8c28d2309", "name": "Text Classifier", "type": "@n8n/n8n-nodes-langchain.textClassifier", "position": [ -96, -32 ], "parameters": { "options": {}, "inputText": "={{ $json.text }}", "categories": { "categories": [ { "category": "High Priority", "description": "Description: Emails that require immediate attention and could have a serious impact if delayed. Typical examples include: system outages, security alerts, critical legal notices, or urgent requests from executives or key clients. Examples: '[URGENT] Service outage notice', '[IMPORTANT] Contract renewal deadline'" }, { "category": "Advertisement", "description": "Description: Marketing or promotional emails that do not require an immediate response. Typical examples include: sales announcements, product launches, newsletters, and event invitations. Examples: '[LIMITED OFFER] 50% off campaign', 'New service release announcement'" }, { "category": "Inquiry", "description": "Description: Customer or partner inquiries that require a reply or follow-up. Typical examples include: product or service questions, quote requests, reservations, troubleshooting, repair or refund requests. Examples: 'Inquiry about studio reservation', 'Request for quotation'" }, { "category": "Finance/Billing", "description": "Description: Emails related to payments, invoices, or financial transactions. Typical examples include: invoices, receipts, payment confirmations, bank or accounting notifications, and tax-related documents. Examples: 'Invoice submission notice', '[Payment confirmed] Thank you for your payment'" } ] } }, "typeVersion": 1.1 }, { "id": "aaddb0e0-fd5f-49ab-8887-f3ecc5bd9d89", "name": "OpenAI Chat Model", "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi", "position": [ -96, 208 ], "parameters": { "model": { "__rl": true, "mode": "list", "value": "gpt-4.1-mini" }, "options": { "maxRetries": 1 } }, "credentials": { "openAiApi": { "name": "" } }, "typeVersion": 1.2 }, { "id": "52265538-92f0-45b9-a7e8-78ba934620cf", "name": "Save Priority Mail", "type": "n8n-nodes-base.gmail", "position": [ 432, -240 ], "parameters": { "labelIds": [ "Label_6395372519299544115" ], "messageId": "={{ $json.id }}", "operation": "addLabels" }, "credentials": { "gmailOAuth2": { "name": "" } }, "typeVersion": 2.1 }, { "id": "a3ac1d27-05ca-4832-bee9-176899915b27", "name": "Save Advertisement Mail", "type": "n8n-nodes-base.gmail", "position": [ 432, -48 ], "parameters": { "labelIds": [ "Label_2877175876700118240" ], "messageId": "={{ $json.id }}", "operation": "addLabels" }, "credentials": { "gmailOAuth2": { "name": "" } }, "typeVersion": 2.1 }, { "id": "696b4433-3093-436c-b98d-2f910858823e", "name": "Save Inquiry Mail", "type": "n8n-nodes-base.gmail", "position": [ 432, 144 ], "parameters": { "labelIds": [ "Label_8971387974199578288" ], "messageId": "={{ $json.id }}", "operation": "addLabels" }, "credentials": { "gmailOAuth2": { "name": "" } }, "typeVersion": 2.1 }, { "id": "68f89db1-59b8-4b15-8ac6-52354a28093a", "name": "Save Finance Mail", "type": "n8n-nodes-base.gmail", "position": [ 432, 336 ], "parameters": { "labelIds": [ "Label_7818902445747119871" ], "messageId": "={{ $json.id }}", "operation": "addLabels" }, "credentials": { "gmailOAuth2": { "name": "" } }, "typeVersion": 2.1 }, { "id": "cdb0c68f-e041-47ef-b65e-14e2c476a760", "name": "Generate Priority Draft", "type": "@n8n/n8n-nodes-langchain.openAi", "position": [ 640, -240 ], "parameters": { "modelId": { "__rl": true, "mode": "list", "value": "gpt-4o", "cachedResultName": "GPT-4O" }, "options": {}, "messages": { "values": [ { "content": "=You are an executive assistant. \nYour task is to reply accurately to high-priority incoming emails. \nHere is the email you need to respond to: {{ $('Gmail Trigger').item.json.text }} \n\nPlease output the following parameters:\n- Subject \n- Message\n" } ] }, "jsonOutput": true }, "credentials": { "openAiApi": { "name": "" } }, "executeOnce": false, "typeVersion": 1.8, "alwaysOutputData": false }, { "id": "a59b0fc2-b11e-4e9c-a5c6-b5aa33f85bac", "name": "Generate Ad Summary", "type": "@n8n/n8n-nodes-langchain.openAi", "position": [ 640, -48 ], "parameters": { "modelId": { "__rl": true, "mode": "list", "value": "gpt-4o", "cachedResultName": "GPT-4O" }, "options": {}, "messages": { "values": [ { "content": "=You are a marketing specialist. \nYour task is to summarize incoming promotional or marketing emails concisely in 1\u20132 lines for spreadsheet logging. \n\nHere is the received email: {{ $('Gmail Trigger').item.json.text }}\n\nPlease extract and summarize the following fields:\n- Sender \n- Subject \n- Summary \n- Recommendation\n" } ] }, "jsonOutput": true }, "credentials": { "openAiApi": { "name": "" } }, "executeOnce": false, "typeVersion": 1.8, "alwaysOutputData": false }, { "id": "64f4df61-ee88-4ea0-857f-7d738c2f3c21", "name": "Generate Finance Summary", "type": "@n8n/n8n-nodes-langchain.openAi", "position": [ 640, 144 ], "parameters": { "modelId": { "__rl": true, "mode": "list", "value": "gpt-4o", "cachedResultName": "GPT-4O" }, "options": {}, "messages": { "values": [ { "content": "=You are a customer service representative. \nYour task is to reply accurately to customer inquiries. \nIf the question cannot be answered, instruct the sender to contact the following number: 000-0000-000. \n\nHere is the email you need to respond to: {{ $('Gmail Trigger').item.json.text }}\n\nPlease output the following parameters:\n- Subject \n- Message\n" } ] }, "jsonOutput": true }, "credentials": { "openAiApi": { "name": "" } }, "executeOnce": false, "typeVersion": 1.8, "alwaysOutputData": false }, { "id": "a8df46ff-73f7-4129-94cb-0f452b328716", "name": "Generate Inquiry Reply", "type": "@n8n/n8n-nodes-langchain.openAi", "position": [ 640, 336 ], "parameters": { "modelId": { "__rl": true, "mode": "list", "value": "gpt-4o", "cachedResultName": "GPT-4O" }, "options": {}, "messages": { "values": [ { "content": "=You are a finance and billing assistant. \nYour task is to summarize emails related to invoices, payments, and financial notifications in a concise manner. \n\nHere is the received email: {{ $('Gmail Trigger').item.json.text }}\n\nPlease output the following parameters:\n- Subject \n- Message\n" } ] }, "jsonOutput": true }, "credentials": { "openAiApi": { "name": "" } }, "executeOnce": false, "typeVersion": 1.8, "alwaysOutputData": false }, { "id": "ef15e762-463f-4acd-9c38-cb84735c9feb", "name": "Create Draft", "type": "n8n-nodes-base.gmail", "position": [ 992, -240 ], "parameters": { "message": "={{ $json.message.content['message'] }}", "options": {}, "subject": "={{ $json.message.content['send'] }}", "resource": "draft" }, "credentials": { "gmailOAuth2": { "name": "" } }, "typeVersion": 2.1 }, { "id": "45aa5109-f0c2-43e7-a91a-db0fcc109cc7", "name": "Append Row to Sheet", "type": "n8n-nodes-base.googleSheets", "position": [ 992, -48 ], "parameters": { "columns": { "value": { "Sender": "={{ $json.message.content['Sender'] }}", "Subject": "={{ $json.message.content['Subject'] }}", "Summary": "={{ $json.message.content['Summary'] }}", "Recommendation": "={{ $json.message.content['Recommendation'] }}" }, "schema": [ { "id": "Sender", "type": "string", "display": true, "removed": false, "required": false, "displayName": "Sender", "defaultMatch": false, "canBeUsedToMatch": true }, { "id": "Subject", "type": "string", "display": true, "removed": false, "required": false, "displayName": "Subject", "defaultMatch": false, "canBeUsedToMatch": true }, { "id": "Summary", "type": "string", "display": true, "removed": false, "required": false, "displayName": "Summary", "defaultMatch": false, "canBeUsedToMatch": true }, { "id": "Recommendation", "type": "string", "display": true, "removed": false, "required": false, "displayName": "Recommendation", "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/13AmknC94wJ5n1FDl7E1yUFsCNYVDJklzPpTZmFQrMb4/edit#gid=0", "cachedResultName": "01_Advertisement Mail Summary" }, "documentId": { "__rl": true, "mode": "list", "value": "13AmknC94wJ5n1FDl7E1yUFsCNYVDJklzPpTZmFQrMb4", "cachedResultUrl": "https://docs.google.com/spreadsheets/d/13AmknC94wJ5n1FDl7E1yUFsCNYVDJklzPpTZmFQrMb4/edit?usp=drivesdk", "cachedResultName": "[n8n] Advertisement Mail Summary" } }, "credentials": { "googleSheetsOAuth2Api": { "name": "" } }, "typeVersion": 4.6 }, { "id": "6701a84f-2e2a-42f2-9c98-fb7ee3f394f1", "name": "Send Finance Mail", "type": "n8n-nodes-base.gmail", "position": [ 992, 144 ], "parameters": { "message": "={{ $json.message.content['message'] }}", "options": {}, "resource": "thread", "threadId": "={{ $('Save Inquiry Mail').item.json.threadId }}", "messageId": "={{ $('Save Inquiry Mail').item.json.id }}", "operation": "reply" }, "credentials": { "gmailOAuth2": { "name": "" } }, "typeVersion": 2.1 }, { "id": "89129a16-1f1a-48e4-82f1-0593c142909b", "name": "Reply to Inquiry", "type": "n8n-nodes-base.gmail", "position": [ 992, 336 ], "parameters": { "sendTo": "{{YOUR_EMAIL_ADDRESS}}", "message": "={{ $json.message.content['message'] }}", "options": {}, "subject": "={{ $json.message.content['send'] }}" }, "credentials": { "gmailOAuth2": { "name": "" } }, "typeVersion": 2.1 }, { "id": "6f1a41f5-ad3e-4b4b-906d-44a20bbe0623", "name": "Sticky Note", "type": "n8n-nodes-base.stickyNote", "position": [ 1264, -304 ], "parameters": { "width": 416, "height": 880, "content": "## \ud83d\udce9Gmail Auto Reply & Categorization with AI (LangChain + OpenAI + Google Sheets)\n\n**Description:**\nThis workflow automatically categorizes incoming Gmail messages into four types \u2014 High Priority, Advertisement, Inquiry, and Finance/Billing \u2014 using the LangChain Text Classifier.\nEach category triggers a specific automated action powered by OpenAI GPT models:\n\n\ud83d\udfe5 High Priority: Generates an AI-written draft reply in Gmail.\n\n\ud83d\udfe8 Advertisement: Summarizes the content and logs it to Google Sheets.\n\n\ud83d\udfe9 Inquiry: Creates an auto-reply email with fallback instructions.\n\n\ud83d\udfe6 Finance/Billing: Generates a brief summary and forwards it to a designated address.\n\nThis setup combines Gmail + LangChain + OpenAI + Google Sheets for a complete AI-driven email management system that reduces manual sorting and response time.\n\n**Setup Instructions:**\n\nConnect your credentials for Gmail, Google Sheets, and OpenAI.\n\nReplace all placeholders such as {{YOUR_EMAIL_ADDRESS}}, {{YOUR_SPREADSHEET_ID}}, and label names with your actual values.\n\nMake sure you have Gmail labels created for \u201cAdvertisement,\u201d \u201cInquiry,\u201d etc.\n\n(Optional) Translate prompts back to your language if needed.\n" }, "typeVersion": 1 }, { "id": "49d044e4-0a1c-4fff-b205-77d43db01251", "name": "Sticky Note1", "type": "n8n-nodes-base.stickyNote", "position": [ -336, -176 ], "parameters": { "color": 2, "width": 512, "height": 496, "content": "## \u2460Receive Gmail \u2192 AI understands the email content\nIncoming emails are analyzed by AI and automatically categorized into four sections: High Priority, Advertisement, Inquiry, and Finance/Billing." }, "typeVersion": 1 }, { "id": "904ff69b-74bc-4c26-aa3d-5af797548e7e", "name": "Sticky Note2", "type": "n8n-nodes-base.stickyNote", "position": [ 272, -624 ], "parameters": { "width": 960, "height": 1200, "content": "## \u2461Email Processing Section\n**Flow Overview:**\nThis workflow automatically classifies all incoming Gmail messages into four categories using the LangChain Text Classifier and performs specific actions for each:\n\n\ud83d\udfe5 High Priority: Gmail adds a \u201cHigh Priority\u201d label \u2192 OpenAI generates a reply draft \u2192 saved as a Gmail draft.\n\n\ud83d\udfe8 Advertisement: AI summarizes the email \u2192 summary is recorded into a Google Sheet for later review.\n\n\ud83d\udfe9 Inquiry: AI generates an automatic customer reply \u2192 sends a polite response or fallback message.\n\n\ud83d\udfe6 Finance/Billing: AI creates a short summary of financial or billing-related content \u2192 forwards it to a designated email address.\n\n**Purpose:**\nThe system ensures that each type of incoming email is handled automatically and intelligently: urgent messages are drafted quickly, promotional content is logged, customer inquiries are answered promptly, and financial communications are safely redirected \u2014 all through a single AI-powered workflow." }, "typeVersion": 1 } ], "active": false, "settings": { "executionOrder": "v1" }, "versionId": "fa5d38ad-f0cb-4b9a-962d-295da7453ed7", "connections": { "Gmail Trigger": { "main": [ [ { "node": "Text Classifier", "type": "main", "index": 0 } ] ] }, "Text Classifier": { "main": [ [ { "node": "Save Priority Mail", "type": "main", "index": 0 } ], [ { "node": "Save Advertisement Mail", "type": "main", "index": 0 } ], [ { "node": "Save Inquiry Mail", "type": "main", "index": 0 } ], [ { "node": "Save Finance Mail", "type": "main", "index": 0 } ] ] }, "OpenAI Chat Model": { "ai_languageModel": [ [ { "node": "Text Classifier", "type": "ai_languageModel", "index": 0 } ] ] }, "Save Finance Mail": { "main": [ [ { "node": "Generate Inquiry Reply", "type": "main", "index": 0 } ] ] }, "Save Inquiry Mail": { "main": [ [ { "node": "Generate Finance Summary", "type": "main", "index": 0 } ] ] }, "Save Priority Mail": { "main": [ [ { "node": "Generate Priority Draft", "type": "main", "index": 0 } ] ] }, "Generate Ad Summary": { "main": [ [ { "node": "Append Row to Sheet", "type": "main", "index": 0 } ] ] }, "Generate Inquiry Reply": { "main": [ [ { "node": "Reply to Inquiry", "type": "main", "index": 0 } ] ] }, "Generate Priority Draft": { "main": [ [ { "node": "Create Draft", "type": "main", "index": 0 } ] ] }, "Save Advertisement Mail": { "main": [ [ { "node": "Generate Ad Summary", "type": "main", "index": 0 } ] ] }, "Generate Finance Summary": { "main": [ [ { "node": "Send Finance Mail", "type": "main", "index": 0 } ] ] } } }