Keith Uy This workflow corresponds to n8n.io template #16289 — 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": "iSOe1xoQiNnyisNX",
"meta": {
"templateCredsSetupCompleted": true
},
"name": "Cold-Email Reply Classifier & Auto-Triage (Claude)",
"tags": [],
"nodes": [
{
"id": "cddbe6a7-9e12-483c-8dd6-1d30055bfad8",
"name": "Sticky Note - Overview",
"type": "n8n-nodes-base.stickyNote",
"position": [
-208,
-32
],
"parameters": {
"color": 4,
"width": 580,
"height": 652,
"content": "## Cold-Email Reply Classifier & Auto-Triage (n8n + Claude)\n\n**Who it's for:** You run cold outbound and the replies pile up faster than you can deal with them.\n\n**What it does:** Claude reads every reply and drops it into one of six buckets (interested, not now, out of office, unsubscribe, referral, objection) with a confidence score. If someone's interested, you get a Slack ping plus a draft reply you can tweak and send. Everything else gets the matching Gmail label.\n\n**How it works:**\n1. The Gmail trigger picks up each new email.\n2. The Config node holds your offer context, Slack channel, and Gmail label IDs.\n3. Claude classifies the reply and writes a suggested response.\n4. A Switch sends interested replies to Slack and a Gmail draft. The rest get routed to the label node.\n\n**How to use:**\n- Connect Anthropic, Gmail and Slack (Select your account in each account)\n- Edit your offer context in the Config node.\n- Add your Slack channel and Gmail label IDs for each reply category.\n- Test one reply, then turn it on."
},
"typeVersion": 1
},
{
"id": "92ba0cf3-af37-404a-88dd-31a9d82a8af1",
"name": "Sticky Note - Setup",
"type": "n8n-nodes-base.stickyNote",
"position": [
608,
-48
],
"parameters": {
"color": 5,
"width": 252,
"height": 428,
"content": "### Setup\nConnect Gmail, Claude and Slack on the nodes below. In **Config**, add your offer context, Slack channel, and Gmail label IDs for not now, out of office, unsubscribe, referral, objection, and review."
},
"typeVersion": 1
},
{
"id": "ed4b4fbf-68c9-4db1-b01d-299779c8ec33",
"name": "Sticky Note - AI",
"type": "n8n-nodes-base.stickyNote",
"position": [
1024,
-48
],
"parameters": {
"color": 7,
"width": 380,
"height": 400,
"content": "### 1. Classify with Claude\nReturns JSON with the category, a confidence score (0-100), a one-line summary, and a draft reply in your voice."
},
"typeVersion": 1
},
{
"id": "bd6a8b3b-983b-4f4e-8e3d-ff5a19a9eb85",
"name": "Sticky Note - Route",
"type": "n8n-nodes-base.stickyNote",
"position": [
1520,
-48
],
"parameters": {
"color": 7,
"width": 716,
"height": 1496,
"content": "### 2. Route and act\nSwitch branches route each category. Interested replies go to Slack and get a Gmail draft. Each non-interested category gets its matching Gmail label."
},
"typeVersion": 1
},
{
"id": "80a4771c-bfe0-4cf7-8b27-3912c2ca508b",
"name": "New Email Reply",
"type": "n8n-nodes-base.gmailTrigger",
"position": [
432,
224
],
"parameters": {
"simple": false,
"filters": {},
"options": {},
"pollTimes": {
"item": [
{
"mode": "everyMinute"
}
]
}
},
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"typeVersion": 1.2
},
{
"id": "6846c424-a98e-4727-97ee-fe69e2d0be01",
"name": "Config (edit me)",
"type": "n8n-nodes-base.set",
"position": [
688,
224
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "a1",
"name": "offer_context",
"type": "string",
"value": "We sell done-for-you cold-outbound lead-gen systems to US marketing agencies. Our tone is direct, helpful, and low-pressure. When drafting a reply to an interested prospect, propose a quick 15-minute call and offer two time windows. Never be pushy. Sign off as 'Keith'."
},
{
"id": "a2",
"name": "slack_channel",
"type": "string",
"value": "#cold-email-replies"
},
{
"id": "not_now_label_id",
"name": "not_now_label_id",
"type": "string",
"value": "REPLACE_WITH_NOT_NOW_LABEL_ID"
},
{
"id": "out_of_office_label_id",
"name": "out_of_office_label_id",
"type": "string",
"value": "REPLACE_WITH_OUT_OF_OFFICE_LABEL_ID"
},
{
"id": "unsubscribe_label_id",
"name": "unsubscribe_label_id",
"type": "string",
"value": "REPLACE_WITH_UNSUBSCRIBE_LABEL_ID"
},
{
"id": "referral_label_id",
"name": "referral_label_id",
"type": "string",
"value": "REPLACE_WITH_REFERRAL_LABEL_ID"
},
{
"id": "objection_label_id",
"name": "objection_label_id",
"type": "string",
"value": "REPLACE_WITH_OBJECTION_LABEL_ID"
},
{
"id": "review_label_id",
"name": "review_label_id",
"type": "string",
"value": "REPLACE_WITH_REVIEW_LABEL_ID"
}
]
}
},
"typeVersion": 3.4
},
{
"id": "ea73298d-8b62-4fe4-8901-f76417dd4493",
"name": "Classify Reply + Draft Response",
"type": "@n8n/n8n-nodes-langchain.chainLlm",
"position": [
1104,
224
],
"parameters": {
"text": "=You triage replies to cold outreach emails.\n\nOFFER / VOICE CONTEXT:\n{{ $('Config (edit me)').item.json.offer_context }}\n\nINCOMING EMAIL:\nFrom: {{ $('New Email Reply').item.json.from }}\nSubject: {{ $('New Email Reply').item.json.subject }}\nBody:\n{{ $('New Email Reply').item.json.snippet }}\n\nTASK:\n1. Classify the reply into exactly one category: interested, not_now, out_of_office, unsubscribe, referral, objection.\n2. Give a confidence score 0-100.\n3. Write a one-line summary of the reply.\n4. Draft a short suggested reply in the voice described above. If the category is unsubscribe or out_of_office, set suggested_reply to an empty string.",
"promptType": "define",
"hasOutputParser": true
},
"typeVersion": 1.4
},
{
"id": "1447dbe9-11d1-47f7-b478-e03b9602b433",
"name": "Anthropic Chat Model",
"type": "@n8n/n8n-nodes-langchain.lmChatAnthropic",
"position": [
976,
560
],
"parameters": {
"model": {
"__rl": true,
"mode": "list",
"value": "claude-sonnet-4-6",
"cachedResultName": "Claude Sonnet 4.6"
},
"options": {
"temperature": 0.3
}
},
"credentials": {
"anthropicApi": {
"name": "<your credential>"
}
},
"typeVersion": 1.3
},
{
"id": "04935a5a-3475-4cd7-9360-307322e574e1",
"name": "Structured Output Parser",
"type": "@n8n/n8n-nodes-langchain.outputParserStructured",
"position": [
1248,
400
],
"parameters": {
"jsonSchemaExample": "{\n \"category\": \"interested\",\n \"confidence\": 88,\n \"summary\": \"Wants to see pricing and a quick call next week.\",\n \"suggested_reply\": \"Happy to walk you through it. Would Tue 10am or Wed 2pm work for a quick 15 min?\"\n}"
},
"typeVersion": 1.2
},
{
"id": "4259ec7c-c55c-4fb7-9eb8-32b9d9b0b6ca",
"name": "Route by Category",
"type": "n8n-nodes-base.switch",
"position": [
1552,
144
],
"parameters": {
"rules": {
"values": [
{
"outputKey": "Interested",
"conditions": {
"options": {
"version": 1,
"leftValue": "",
"caseSensitive": false,
"typeValidation": "loose"
},
"combinator": "and",
"conditions": [
{
"operator": {
"type": "string",
"operation": "equals"
},
"leftValue": "={{ $json.output.category }}",
"rightValue": "interested"
}
]
},
"renameOutput": true
},
{
"outputKey": "Not now",
"conditions": {
"options": {
"version": 1,
"leftValue": "",
"caseSensitive": false,
"typeValidation": "loose"
},
"combinator": "and",
"conditions": [
{
"operator": {
"type": "string",
"operation": "equals"
},
"leftValue": "={{ $json.output.category }}",
"rightValue": "not_now"
}
]
},
"renameOutput": true
},
{
"outputKey": "Out of office",
"conditions": {
"options": {
"version": 1,
"leftValue": "",
"caseSensitive": false,
"typeValidation": "loose"
},
"combinator": "and",
"conditions": [
{
"operator": {
"type": "string",
"operation": "equals"
},
"leftValue": "={{ $json.output.category }}",
"rightValue": "out_of_office"
}
]
},
"renameOutput": true
},
{
"outputKey": "Unsubscribe",
"conditions": {
"options": {
"version": 1,
"leftValue": "",
"caseSensitive": false,
"typeValidation": "loose"
},
"combinator": "and",
"conditions": [
{
"operator": {
"type": "string",
"operation": "equals"
},
"leftValue": "={{ $json.output.category }}",
"rightValue": "unsubscribe"
}
]
},
"renameOutput": true
},
{
"outputKey": "Referral",
"conditions": {
"options": {
"version": 1,
"leftValue": "",
"caseSensitive": false,
"typeValidation": "loose"
},
"combinator": "and",
"conditions": [
{
"operator": {
"type": "string",
"operation": "equals"
},
"leftValue": "={{ $json.output.category }}",
"rightValue": "referral"
}
]
},
"renameOutput": true
},
{
"outputKey": "Objection",
"conditions": {
"options": {
"version": 1,
"leftValue": "",
"caseSensitive": false,
"typeValidation": "loose"
},
"combinator": "and",
"conditions": [
{
"operator": {
"type": "string",
"operation": "equals"
},
"leftValue": "={{ $json.output.category }}",
"rightValue": "objection"
}
]
},
"renameOutput": true
}
]
},
"options": {
"fallbackOutput": "extra",
"renameFallbackOutput": "Review"
}
},
"typeVersion": 3
},
{
"id": "33bd018b-2e61-413d-b2eb-3ebb786ddb80",
"name": "Notify Slack",
"type": "n8n-nodes-base.slack",
"position": [
1792,
128
],
"parameters": {
"text": "=:fire: *Interested reply* ({{ $json.output.confidence }}% conf)\nFrom: {{ $('New Email Reply').item.json.from }}\nSummary: {{ $json.output.summary }}\n\nDraft reply prepared in Gmail.",
"select": "channel",
"channelId": {
"__rl": true,
"mode": "name",
"value": "={{ $('Config (edit me)').item.json.slack_channel }}"
},
"otherOptions": {}
},
"credentials": {
"slackApi": {
"name": "<your credential>"
}
},
"typeVersion": 2.3
},
{
"id": "05af5d58-90d3-4380-b95b-8f280b3e734e",
"name": "Create Gmail Draft",
"type": "n8n-nodes-base.gmail",
"position": [
2016,
128
],
"parameters": {
"message": "={{ $json.output.suggested_reply }}",
"options": {
"sendTo": "={{ $('New Email Reply').item.json.from }}",
"threadId": "={{ $('New Email Reply').item.json.threadId }}"
},
"subject": "=Re: {{ $('New Email Reply').item.json.subject }}",
"resource": "draft"
},
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"typeVersion": 2.2
},
{
"id": "7acdb91d-c75c-48dd-96a2-e6a91409030c",
"name": "Label Not Now",
"type": "n8n-nodes-base.gmail",
"position": [
1792,
320
],
"parameters": {
"labelIds": [
"={{ $('Config (edit me)').item.json.not_now_label_id }}"
],
"messageId": "={{ $('New Email Reply').item.json.id }}",
"operation": "addLabels"
},
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"typeVersion": 2.2
},
{
"id": "2f59feef-110c-4e5d-b20f-ed9fe6c09642",
"name": "Label Out Of Office",
"type": "n8n-nodes-base.gmail",
"position": [
1792,
512
],
"parameters": {
"labelIds": [
"={{ $('Config (edit me)').item.json.out_of_office_label_id }}"
],
"messageId": "={{ $('New Email Reply').item.json.id }}",
"operation": "addLabels"
},
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"typeVersion": 2.2
},
{
"id": "b066c3a2-f089-4dbf-93cc-5029526ec0d6",
"name": "Label Unsubscribe",
"type": "n8n-nodes-base.gmail",
"position": [
1792,
704
],
"parameters": {
"labelIds": [
"={{ $('Config (edit me)').item.json.unsubscribe_label_id }}"
],
"messageId": "={{ $('New Email Reply').item.json.id }}",
"operation": "addLabels"
},
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"typeVersion": 2.2
},
{
"id": "cf5a7015-a9ae-480e-8c6f-2c53c2f3a91a",
"name": "Label Referral",
"type": "n8n-nodes-base.gmail",
"position": [
1792,
896
],
"parameters": {
"labelIds": [
"={{ $('Config (edit me)').item.json.referral_label_id }}"
],
"messageId": "={{ $('New Email Reply').item.json.id }}",
"operation": "addLabels"
},
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"typeVersion": 2.2
},
{
"id": "abbaf29c-5772-4bde-99e8-c2ba2c40d43a",
"name": "Label Objection",
"type": "n8n-nodes-base.gmail",
"position": [
1792,
1088
],
"parameters": {
"labelIds": [
"={{ $('Config (edit me)').item.json.objection_label_id }}"
],
"messageId": "={{ $('New Email Reply').item.json.id }}",
"operation": "addLabels"
},
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"typeVersion": 2.2
},
{
"id": "ce9c3518-d1c9-4212-b67c-290cbdc8d40f",
"name": "Label Review",
"type": "n8n-nodes-base.gmail",
"position": [
1792,
1280
],
"parameters": {
"labelIds": [
"={{ $('Config (edit me)').item.json.review_label_id }}"
],
"messageId": "={{ $('New Email Reply').item.json.id }}",
"operation": "addLabels"
},
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"typeVersion": 2.2
},
{
"id": "18fd6a1b-2994-41a3-97b0-23a0f766cd92",
"name": "Sticky Note - Setup1",
"type": "n8n-nodes-base.stickyNote",
"position": [
912,
400
],
"parameters": {
"color": 5,
"width": 204,
"height": 300,
"content": "### Model Selection\nFeel free to change to a model of your choosing"
},
"typeVersion": 1
}
],
"active": false,
"settings": {
"binaryMode": "separate",
"executionOrder": "v1"
},
"versionId": "b8f0941d-3b55-47c8-b497-42fa0515c873",
"nodeGroups": [],
"connections": {
"Notify Slack": {
"main": [
[
{
"node": "Create Gmail Draft",
"type": "main",
"index": 0
}
]
]
},
"New Email Reply": {
"main": [
[
{
"node": "Config (edit me)",
"type": "main",
"index": 0
}
]
]
},
"Config (edit me)": {
"main": [
[
{
"node": "Classify Reply + Draft Response",
"type": "main",
"index": 0
}
]
]
},
"Route by Category": {
"main": [
[
{
"node": "Notify Slack",
"type": "main",
"index": 0
}
],
[
{
"node": "Label Not Now",
"type": "main",
"index": 0
}
],
[
{
"node": "Label Out Of Office",
"type": "main",
"index": 0
}
],
[
{
"node": "Label Unsubscribe",
"type": "main",
"index": 0
}
],
[
{
"node": "Label Referral",
"type": "main",
"index": 0
}
],
[
{
"node": "Label Objection",
"type": "main",
"index": 0
}
],
[
{
"node": "Label Review",
"type": "main",
"index": 0
}
]
]
},
"Anthropic Chat Model": {
"ai_languageModel": [
[
{
"node": "Classify Reply + Draft Response",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Structured Output Parser": {
"ai_outputParser": [
[
{
"node": "Classify Reply + Draft Response",
"type": "ai_outputParser",
"index": 0
}
]
]
},
"Classify Reply + Draft Response": {
"main": [
[
{
"node": "Route by Category",
"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.
anthropicApigmailOAuth2slackApi
Pro
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About this workflow
This workflow monitors Gmail for new email replies, uses Anthropic Claude to classify each reply and draft a suggested response, then routes interested replies to Slack and a Gmail draft while labeling all other replies in Gmail for triage. Triggers every minute when a new email…
Source: https://n8n.io/workflows/16289/ — original creator credit. Request a take-down →
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