This workflow follows the Agent → 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 →
{
"name": "Email AI Classifier",
"nodes": [
{
"id": "32a7d26c-6f77-4d84-a87d-29a8ac0bc0ac",
"name": "Sticky Note 5aafbb59",
"parameters": {
"color": 2,
"content": "## \ud83d\udce7 Email AI Classifier\n\n**Flow:**\n1. Gmail polls every minute (filter: `in:inbox`, unread)\n2. **Config** holds the two per-account values \u2014\n `alertEmail` and `spamLabelId`. Edit them here;\n nothing else hardcodes them.\n3. Google Gemini 2.5 Flash classifies:\n urgent / sales / personal / spam\n4. Urgent \u2192 email alert to `Config.alertEmail`\n5. Sales/Personal \u2192 threaded draft reply in Gmail\n6. Spam \u2192 `Config.spamLabelId` label, message STAYS\n in inbox (the system SPAM label is deliberately\n not used: a false positive would hide real mail\n and would also train Gmail's own spam filter)\n7. Every branch ends at **Mark as Processed**, which\n marks the email read so the next poll cannot pick\n it up again. On failure it stays unread and is\n retried on the next cycle.\n\n**Credentials (bound by name):**\n- `Gmail account` \u2014 Gmail OAuth2\n- `Google Gemini(PaLM) Api account` \u2014 Gemini\n\nNo OpenAI and no Slack are used by this workflow.",
"height": 248,
"width": 332
},
"position": [
16,
-16
],
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1
},
{
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"id": "ba6d487e-987b-4280-9ae3-eaf69a86594c",
"name": "New Gmail Email",
"parameters": {
"filters": {
"q": "in:inbox"
},
"pollTimes": {
"item": [
{
"mode": "everyMinute"
}
]
},
"simple": false
},
"position": [
80,
288
],
"type": "n8n-nodes-base.gmailTrigger",
"typeVersion": 1.2
},
{
"id": "0d7a59d1-fa5d-468c-81fc-790d1d5f1e04",
"name": "Extract Email Fields",
"parameters": {
"assignments": {
"assignments": [
{
"id": "f1",
"name": "emailId",
"type": "string",
"value": "={{ $json.id }}"
},
{
"id": "f2",
"name": "threadId",
"type": "string",
"value": "={{ $json.threadId }}"
},
{
"id": "f3",
"name": "from",
"type": "string",
"value": "={{ $json.from?.text ?? $json.from ?? $json.From ?? '' }}"
},
{
"id": "f4",
"name": "subject",
"type": "string",
"value": "={{ $json.subject ?? $json.Subject ?? '' }}"
},
{
"id": "f5",
"name": "body",
"type": "string",
"value": "={{ ($json.text ?? $json.snippet ?? $json.textAsHtml ?? '').toString().slice(0, 4000) }}"
}
]
},
"options": {}
},
"position": [
352,
288
],
"type": "n8n-nodes-base.set",
"typeVersion": 3.4
},
{
"id": "4d9f070c-5041-4c3e-b978-ccc240253aac",
"name": "Classify Email",
"parameters": {
"hasOutputParser": true,
"options": {
"systemMessage": "You are an email triage classifier. You ALWAYS respond by calling the `format_final_json_response` tool. You NEVER ask questions and you NEVER reply in plain text.\n\nClassify the email into exactly one category:\n- urgent: requires action TODAY, or mentions an outage, emergency, deadline within 24h, or critical failure. Time-sensitivity wins even if the sender is a sales contact.\n- sales: commercial offer, product pitch, cold outreach, promotion, or newsletter, with NO time pressure.\n- personal: from a friend, family member, or colleague writing informally. Social invitations, personal check-ins, casual conversation.\n- spam: unsolicited bulk email, scam, phishing, suspicious links, prize announcements, crypto schemes, or anything fraudulent.\n\nEDGE CASES (apply these before deciding):\n- Sales rep BUT mentions urgency (e.g. 'your trial expires today', 'server issue with our service') -> urgent\n- Looks personal BUT contains a suspicious link or prize claim -> spam\n- Newsletter with a limited-time offer -> sales, not urgent\n- Genuinely ambiguous between two categories -> pick the higher-risk one (urgent > personal > sales > spam)\n\nFIELDS TO RETURN:\n- category: exactly one of urgent, sales, personal, spam.\n- reason: one sentence explaining your choice.\n- draft_reply: decide this from the category YOU just chose. If your category is \"sales\" or \"personal\", write a friendly, professional reply of 2-3 sentences addressed to the sender. If your category is \"urgent\" or \"spam\", set draft_reply to the empty string \"\". Always include the draft_reply field."
},
"promptType": "define",
"text": "=From: {{ $json.from }}\nSubject: {{ $json.subject }}\nBody: {{ $json.body }}"
},
"position": [
608,
288
],
"type": "@n8n/n8n-nodes-langchain.agent",
"typeVersion": 3.1
},
{
"id": "fde654f9-807c-41ba-b463-5fab18a36478",
"name": "Classification Parser",
"parameters": {
"autoFix": true,
"inputSchema": "{\n \"type\": \"object\",\n \"properties\": {\n \"category\": {\n \"type\": \"string\",\n \"enum\": [\"urgent\", \"sales\", \"personal\", \"spam\"],\n \"description\": \"Exactly one triage category\"\n },\n \"reason\": {\n \"type\": \"string\",\n \"description\": \"One sentence explaining the classification\"\n },\n \"draft_reply\": {\n \"type\": \"string\",\n \"description\": \"2-3 sentence reply for sales/personal, empty string for urgent/spam\"\n }\n },\n \"required\": [\"category\", \"reason\", \"draft_reply\"],\n \"additionalProperties\": false\n}",
"schemaType": "manual"
},
"position": [
752,
688
],
"type": "@n8n/n8n-nodes-langchain.outputParserStructured",
"typeVersion": 1.3
},
{
"id": "78f56919-7a31-4f2f-95e6-655b4a58a489",
"name": "Merge Classification",
"parameters": {
"assignments": {
"assignments": [
{
"id": "m1",
"name": "emailId",
"type": "string",
"value": "={{ $('Extract Email Fields').item.json.emailId }}"
},
{
"id": "m2",
"name": "threadId",
"type": "string",
"value": "={{ $('Extract Email Fields').item.json.threadId }}"
},
{
"id": "m3",
"name": "from",
"type": "string",
"value": "={{ $('Extract Email Fields').item.json.from }}"
},
{
"id": "m4",
"name": "subject",
"type": "string",
"value": "={{ $('Extract Email Fields').item.json.subject }}"
},
{
"id": "m5",
"name": "body",
"type": "string",
"value": "={{ $('Extract Email Fields').item.json.body }}"
},
{
"id": "m6",
"name": "category",
"type": "string",
"value": "={{ $json.output?.category ?? $json.category }}"
},
{
"id": "m7",
"name": "reason",
"type": "string",
"value": "={{ $json.output?.reason ?? $json.reason }}"
},
{
"id": "m8",
"name": "draft_reply",
"type": "string",
"value": "={{ $json.output?.draft_reply ?? $json.draft_reply }}"
}
]
},
"options": {}
},
"position": [
912,
288
],
"type": "n8n-nodes-base.set",
"typeVersion": 3.4
},
{
"id": "3a64c98f-3e44-4cb2-be65-2b3b522ce408",
"name": "Route by Category",
"parameters": {
"options": {
"fallbackOutput": "extra",
"renameFallbackOutput": "spam"
},
"rules": {
"values": [
{
"conditions": {
"combinator": "and",
"conditions": [
{
"id": "f8204135-1bec-4b3d-a7f6-6173194c45c0",
"leftValue": "={{ $json.category }}",
"operator": {
"operation": "equals",
"type": "string"
},
"rightValue": "urgent"
}
],
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "strict",
"version": 2
}
}
},
{
"conditions": {
"combinator": "and",
"conditions": [
{
"id": "400913ce-600d-4a31-8f20-26c580de874a",
"leftValue": "={{ $json.category }}",
"operator": {
"operation": "equals",
"type": "string"
},
"rightValue": "sales"
}
],
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "strict",
"version": 2
}
}
},
{
"conditions": {
"combinator": "and",
"conditions": [
{
"id": "4f957395-3951-4ab8-9ab5-ae7bfe050cf8",
"leftValue": "={{ $json.category }}",
"operator": {
"operation": "equals",
"type": "string"
},
"rightValue": "personal"
}
],
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "strict",
"version": 2
}
}
}
]
}
},
"position": [
1168,
288
],
"type": "n8n-nodes-base.switch",
"typeVersion": 3.2
},
{
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"id": "b9508651-93b6-472c-8862-3698c2f24b78",
"name": "Draft Sales Reply",
"parameters": {
"message": "={{ $json.draft_reply }}",
"options": {
"sendTo": "={{ $json.from }}",
"threadId": "={{ $json.threadId }}"
},
"resource": "draft",
"subject": "=Re: {{ $json.subject }}"
},
"position": [
1424,
288
],
"type": "n8n-nodes-base.gmail",
"typeVersion": 2.1
},
{
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"id": "bf114a8f-b33c-4f9c-abd6-ed2cf0bb15e1",
"name": "Draft Personal Reply",
"parameters": {
"message": "={{ $json.draft_reply }}",
"options": {
"sendTo": "={{ $json.from }}",
"threadId": "={{ $json.threadId }}"
},
"resource": "draft",
"subject": "=Re: {{ $json.subject }}"
},
"position": [
1424,
464
],
"type": "n8n-nodes-base.gmail",
"typeVersion": 2.1
},
{
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"id": "e4df7d0c-d9d2-483f-8b94-74a9aeffc845",
"name": "Label as AI Spam",
"parameters": {
"labelIds": [
"={{ $('Config').first().json.spamLabelId }}"
],
"messageId": "={{ $json.emailId }}",
"operation": "addLabels"
},
"position": [
1424,
656
],
"type": "n8n-nodes-base.gmail",
"typeVersion": 2.1
},
{
"credentials": {
"googlePalmApi": {
"name": "<your credential>"
}
},
"id": "24079ea7-05d1-4c4b-b8ae-48329b06693e",
"name": "Google Gemini Chat Model",
"parameters": {
"modelName": "models/gemini-2.5-flash",
"options": {}
},
"position": [
464,
496
],
"type": "@n8n/n8n-nodes-langchain.lmChatGoogleGemini",
"typeVersion": 1.1
},
{
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"id": "79f3c186-f288-4fd5-8e80-3cde04e3eefd",
"name": "Email Urgent Alert",
"parameters": {
"emailType": "text",
"message": "=URGENT EMAIL RECEIVED\n\nFrom: {{ $json.from }}\nSubject: {{ $json.subject }}\nReason: {{ $json.reason }}\n\nPreview:\n{{ $json.body }}",
"operation": "send",
"options": {},
"resource": "message",
"sendTo": "={{ $('Config').first().json.alertEmail }}",
"subject": "=\ud83d\udea8 URGENT: {{ $json.subject }}"
},
"position": [
1424,
112
],
"type": "n8n-nodes-base.gmail",
"typeVersion": 2.1
},
{
"disabled": false,
"id": "a2b5cc22-17d9-4453-ab7c-42254f636c76",
"name": "Inject Test Emails",
"parameters": {},
"position": [
80,
960
],
"type": "n8n-nodes-base.manualTrigger",
"typeVersion": 1
},
{
"id": "3d04e8a9-6044-4ac1-9f49-477ad46d13db",
"name": "Generate 4 Test Emails",
"parameters": {
"jsCode": "const emails = [\n {\n expectedCategory: 'urgent',\n subject: 'PRODUCTION OUTAGE - API down, customers affected',\n body: 'Our production API has been returning 500s for the last 20 minutes. This is impacting all customers. We need someone to jump on a call immediately and acknowledge before the SLA window closes today.'\n },\n {\n expectedCategory: 'sales',\n subject: 'Cut your reporting time by 40% with GrowthTools',\n body: 'Hi there, I noticed your team is scaling fast. GrowthTools helps companies like yours automate analytics dashboards. Would you be open to a quick 15-minute demo next week? No rush at all.'\n },\n {\n expectedCategory: 'personal',\n subject: 'Dinner this weekend?',\n body: 'Hey! It has been way too long since we caught up. Are you free for dinner on Saturday? Thinking that little Italian place we love. Let me know what works for you!'\n },\n {\n expectedCategory: 'spam',\n subject: 'Congratulations!!! You have WON a $1,000 gift card',\n body: 'Dear lucky user, you have been selected to receive a $1000 Amazon gift card. Click the link below within 24 hours to claim your prize now. Verify your details to release funds.'\n }\n];\n\nreturn emails.map(e => ({ json: e }));"
},
"position": [
352,
960
],
"type": "n8n-nodes-base.code",
"typeVersion": 2
},
{
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"id": "d40ee23a-59d9-49c7-a719-8bfc24a77de0",
"name": "Send Test Email To Self",
"parameters": {
"emailType": "text",
"message": "={{ $json.body }}",
"operation": "send",
"options": {
"appendAttribution": false
},
"resource": "message",
"sendTo": "={{ $('Test Config').first().json.testInbox }}",
"subject": "={{ $json.subject }}"
},
"position": [
624,
960
],
"type": "n8n-nodes-base.gmail",
"typeVersion": 2.1
},
{
"id": "3fbce374-a0fe-4c32-996a-f59644b0670c",
"name": "Test Injector Note",
"parameters": {
"color": 4,
"content": "## \ud83e\uddea Test Email Injector\n\nClick **Inject Test Emails** to send 4 emails (urgent / sales / personal / spam) to the address in **Test Config**.\n\nSend that mail to an inbox the Gmail Trigger above watches \u2014 then the AI classifies and routes it end to end. Standalone branch: runs independently of the live classifier trigger.",
"height": 220,
"width": 760
},
"position": [
-112,
720
],
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1
},
{
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"id": "8f0f484a-4596-4826-a5d1-cb6fb45fce83",
"name": "Mark as Processed",
"parameters": {
"messageId": "={{ $('Merge Classification').item.json.emailId }}",
"operation": "markAsRead",
"resource": "message"
},
"position": [
1712,
400
],
"type": "n8n-nodes-base.gmail",
"typeVersion": 2.1
},
{
"id": "4d6e6593-09d5-4a8a-b9f4-16f306ba8805",
"name": "Config",
"notes": "Edit these two values for your own account. Everything downstream reads them via $('Config').",
"parameters": {
"assignments": {
"assignments": [
{
"id": "cfg-alert-email",
"name": "alertEmail",
"type": "string",
"value": "you@example.com"
},
{
"id": "cfg-spam-label",
"name": "spamLabelId",
"type": "string",
"value": "Label_XXXXXXXXXXXXXXXXXX"
}
]
},
"includeOtherFields": true,
"mode": "manual",
"options": {}
},
"position": [
216,
288
],
"type": "n8n-nodes-base.set",
"typeVersion": 3.4
},
{
"id": "319b765b-f5f5-4b10-9bf4-d7f87a7fafd5",
"name": "Test Config",
"notes": "Inbox the test injector sends to. Must be an address the Gmail Trigger above watches.",
"parameters": {
"assignments": {
"assignments": [
{
"id": "cfg-test-inbox",
"name": "testInbox",
"type": "string",
"value": "you@example.com"
}
]
},
"includeOtherFields": false,
"mode": "manual",
"options": {}
},
"position": [
216,
960
],
"type": "n8n-nodes-base.set",
"typeVersion": 3.4
},
{
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"disabled": true,
"id": "2d4388bb-220b-429b-97e5-adab5d1dd1c2",
"name": "Bootstrap: List Gmail Labels",
"notes": "Run once to find your AI/Spam label id, then paste it into the Config node. Stays disabled.",
"parameters": {
"operation": "getAll",
"resource": "label",
"returnAll": true
},
"position": [
80,
480
],
"type": "n8n-nodes-base.gmail",
"typeVersion": 2.1
}
],
"connections": {
"Classification Parser": {
"ai_outputParser": [
[
{
"index": 0,
"node": "Classify Email",
"type": "ai_outputParser"
}
]
]
},
"Classify Email": {
"main": [
[
{
"index": 0,
"node": "Merge Classification",
"type": "main"
}
]
]
},
"Config": {
"main": [
[
{
"index": 0,
"node": "Extract Email Fields",
"type": "main"
}
]
]
},
"Draft Personal Reply": {
"main": [
[
{
"index": 0,
"node": "Mark as Processed",
"type": "main"
}
]
]
},
"Draft Sales Reply": {
"main": [
[
{
"index": 0,
"node": "Mark as Processed",
"type": "main"
}
]
]
},
"Email Urgent Alert": {
"main": [
[
{
"index": 0,
"node": "Mark as Processed",
"type": "main"
}
]
]
},
"Extract Email Fields": {
"main": [
[
{
"index": 0,
"node": "Classify Email",
"type": "main"
}
]
]
},
"Generate 4 Test Emails": {
"main": [
[
{
"index": 0,
"node": "Send Test Email To Self",
"type": "main"
}
]
]
},
"Google Gemini Chat Model": {
"ai_languageModel": [
[
{
"index": 0,
"node": "Classify Email",
"type": "ai_languageModel"
},
{
"index": 0,
"node": "Classification Parser",
"type": "ai_languageModel"
}
]
]
},
"Inject Test Emails": {
"main": [
[
{
"index": 0,
"node": "Test Config",
"type": "main"
}
]
]
},
"Label as AI Spam": {
"main": [
[
{
"index": 0,
"node": "Mark as Processed",
"type": "main"
}
]
]
},
"Merge Classification": {
"main": [
[
{
"index": 0,
"node": "Route by Category",
"type": "main"
}
]
]
},
"New Gmail Email": {
"main": [
[
{
"index": 0,
"node": "Config",
"type": "main"
}
]
]
},
"Route by Category": {
"main": [
[
{
"index": 0,
"node": "Email Urgent Alert",
"type": "main"
}
],
[
{
"index": 0,
"node": "Draft Sales Reply",
"type": "main"
}
],
[
{
"index": 0,
"node": "Draft Personal Reply",
"type": "main"
}
],
[
{
"index": 0,
"node": "Label as AI Spam",
"type": "main"
}
]
]
},
"Test Config": {
"main": [
[
{
"index": 0,
"node": "Generate 4 Test Emails",
"type": "main"
}
]
]
}
},
"settings": {
"availableInMCP": true,
"binaryMode": "separate",
"executionOrder": "v1"
},
"meta": {
"aiBuilderAssisted": true,
"builderVariant": "mcp",
"templateCredsSetupCompleted": true
},
"tags": [],
"description": "Classify Emails by Ai Agents",
"nodeGroups": []
}
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.
gmailOAuth2googlePalmApi
Pro
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About this workflow
Email AI Classifier. Uses gmailTrigger, agent, outputParserStructured, gmail. Event-driven trigger; 20 nodes.
Source: https://github.com/artensCeruni/n8n-workflows/blob/main/workflows/email-ai-classifier/workflow.json — original creator credit. Request a take-down →
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