This workflow follows the Chainllm → HTTP Request 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 →
{
"meta": {
"templateCredsSetupCompleted": true
},
"nodes": [
{
"id": "7786165e-5e74-4614-b065-86db19482b72",
"name": "Format text with Markdown",
"type": "n8n-nodes-base.markdown",
"position": [
-1200,
980
],
"parameters": {
"html": "={{ $json.text }}",
"options": {},
"destinationKey": "textClean"
},
"typeVersion": 1,
"continueOnFail": true
},
{
"id": "8f73d4d6-2473-4fdf-8797-c049d6df6967",
"name": "Lemlist Trigger - On new reply",
"type": "n8n-nodes-base.lemlistTrigger",
"position": [
-1600,
980
],
"parameters": {
"event": "emailsReplied",
"options": {
"isFirst": true
}
},
"typeVersion": 1
},
{
"id": "1f94d672-0a70-45ad-bf96-72c4aecabcd0",
"name": "Sticky Note",
"type": "n8n-nodes-base.stickyNote",
"position": [
-1700,
680
],
"parameters": {
"width": 304.92548549441915,
"height": 504.9663351162785,
"content": "### Get your lemlist API key\n\n1. Go to your lemlist account or create one [HERE](https://app.lemlist.com/create-account)\n\n2. Go to Settings -> Integrations\n\n3. Generate your API Key and copy it\n\n4. On this node, click on create new credential and paste your API key"
},
"typeVersion": 1
},
{
"id": "3032b04c-76a2-4f7c-a790-ede26b102254",
"name": "Sticky Note1",
"type": "n8n-nodes-base.stickyNote",
"position": [
-2040,
680
],
"parameters": {
"width": 319.6621253622332,
"height": 507.1074887209538,
"content": "# Read me\n\nThis workflow send email replies of your lemlist campaigns to the Slack channel of your choice.\n\nThe OpenAI node will classify the reply status. \n\nThe Slack alert is structured in a way that make it easy to read for the user."
},
"typeVersion": 1
},
{
"id": "df142fcb-f5ec-475d-8f90-c0bd064d390c",
"name": "OpenAI Chat Model",
"type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
"position": [
-760,
1320
],
"parameters": {
"model": "gpt-4o",
"options": {}
},
"typeVersion": 1
},
{
"id": "1fa6d12c-2555-42c6-8f80-b24dc3608ed7",
"name": "Structured Output Parser",
"type": "@n8n/n8n-nodes-langchain.outputParserStructured",
"position": [
-600,
1320
],
"parameters": {
"schemaType": "manual",
"inputSchema": "{\n\t\"type\": \"object\",\n\t\"properties\": {\n\t\t\"category\": {\n\t\t\t\"type\": \"string\"\n }\n\t}\n}"
},
"typeVersion": 1.2
},
{
"id": "734013f9-d058-4f08-9026-a41cd5877a3b",
"name": "Send alert to Slack",
"type": "n8n-nodes-base.slack",
"position": [
320,
700
],
"parameters": {
"text": "=",
"select": "channel",
"blocksUi": "={\n\t\"blocks\": [\n\t\t{\n\t\t\t\"type\": \"section\",\n\t\t\t\"text\": {\n\t\t\t\t\"type\": \"mrkdwn\",\n\t\t\t\t\"text\": \":raised_hands: New reply in lemlist!\\n\"\n\t\t\t}\n\t\t},\n\t\t{\n\t\t\t\"type\": \"section\",\n\t\t\t\"fields\": [\n\t\t\t\t{\n\t\t\t\t\t\"type\": \"mrkdwn\",\n\t\t\t\t\t\"text\": \"*Categorized as:*\\n{{ $json[\"output\"][\"category\"] }}\"\n\t\t\t\t},\n\t\t\t\t{\n\t\t\t\t\t\"type\": \"mrkdwn\",\n\t\t\t\t\t\"text\": \"*Campaign:*\\n<https://app.lemlist.com/teams/{{ $json[\"teamId\"] }}/reports/campaigns/{{ $json[\"campaignId\"] }}|{{ $json[\"campaignName\"] }}>\"\n\t\t\t\t},\n\t\t\t\t{\n\t\t\t\t\t\"type\": \"mrkdwn\",\n\t\t\t\t\t\"text\": \"*Sender Email:*\\n{{ $json[\"sendUserEmail\"] }}\"\n\t\t\t\t},\n\t\t\t\t{\n\t\t\t\t\t\"type\": \"mrkdwn\",\n\t\t\t\t\t\"text\": \"*Lead Email:*\\n{{ $json[\"leadEmail\"] }}\"\n\t\t\t\t},\n\t\t\t\t{\n\t\t\t\t\t\"type\": \"mrkdwn\",\n\t\t\t\t\t\"text\": \"*Linkedin URL:*\\n{{ $json[\"linkedinUrl\"] }}\"\n\t\t\t\t}\n\t\t\t]\n\t\t},\n\t\t{\n\t\t\t\"type\": \"section\",\n\t\t\t\"text\": {\n\t\t\t\t\"type\": \"mrkdwn\",\n\t\t\t\t\"text\": \"*Reply preview*:\\n{{ JSON.stringify($json[\"textClean\"]).replace(/^\"(.+(?=\"$))\"$/, '$1').substring(0, 100) }}\"\n\t\t\t}\n\t\t}\n\t]\n}",
"channelId": {
"__rl": true,
"mode": "name",
"value": "automated_outbound_replies"
},
"messageType": "block",
"otherOptions": {
"botProfile": {
"imageValues": {
"icon_emoji": ":fire:",
"profilePhotoType": "emoji"
}
},
"unfurl_links": false,
"includeLinkToWorkflow": false
}
},
"typeVersion": 2.1
},
{
"id": "0558c166-16d7-4c26-a09c-fb46c2b6b687",
"name": "Lemlist - Unsubscribe",
"type": "n8n-nodes-base.lemlist",
"position": [
300,
1000
],
"parameters": {
"email": "={{ $json[\"leadEmail\"] }}",
"resource": "lead",
"operation": "unsubscribe",
"campaignId": "={{$json[\"campaignId\"]}}"
},
"typeVersion": 1
},
{
"id": "79d17d20-a60a-4b5a-a83c-821cac265b17",
"name": "lemlist - Mark as interested",
"type": "n8n-nodes-base.httpRequest",
"position": [
300,
1260
],
"parameters": {
"url": "=https://api.lemlist.com/api/campaigns/{{$json[\"campaignId\"]}}/leads/{{$json[\"leadEmail\"]}}/interested",
"options": {},
"requestMethod": "POST",
"authentication": "predefinedCredentialType",
"nodeCredentialType": "lemlistApi"
},
"typeVersion": 2
},
{
"id": "04f74337-903c-481a-95ca-a1d4a5985b9e",
"name": "Categorize lemlist reply",
"type": "@n8n/n8n-nodes-langchain.chainLlm",
"position": [
-780,
1120
],
"parameters": {
"text": "=Classify the [email_content] in one only of the following categories: \n\nCategories=[\"Interested\", \"Out of office\", \"Unsubscribe\", \"Not interested\", \"Other\"] \n\n- Interested is when the reply is positive, and the person want more information or a meeting \n\nDon't output quotes like in the next example: \nemail_content_example:Hey I would like to know more \ncategory:Interested\n\nemail_content:\"{{ $json.textClean }}\" \n\nOnly answer with JSON in the following format:\n{\"replyStatus\":category}\n\nJSON:",
"promptType": "define",
"hasOutputParser": true
},
"typeVersion": 1.4
},
{
"id": "c1d66785-e096-4fd7-90de-51c7b9117413",
"name": "Merge data",
"type": "n8n-nodes-base.merge",
"position": [
-280,
1000
],
"parameters": {
"mode": "combine",
"options": {},
"combinationMode": "mergeByPosition"
},
"typeVersion": 2.1
},
{
"id": "bf21f5b9-6978-4657-a0a2-847265cff31e",
"name": "Sticky Note2",
"type": "n8n-nodes-base.stickyNote",
"position": [
260,
520
],
"parameters": {
"width": 480.38008828116847,
"height": 341.5885389153657,
"content": "### Create a Slack notification for each new replies\n\n1. Connect your Slack account by clicking to add Credentials\n\n2. Write the name of the channel where you want to send the Slack alert"
},
"typeVersion": 1
},
{
"id": "024b4399-8e20-4974-986d-6c1ee4103fa0",
"name": "Route reply to the right branch",
"type": "n8n-nodes-base.switch",
"position": [
-100,
1000
],
"parameters": {
"rules": {
"values": [
{
"outputKey": "Send all replies to Slack",
"conditions": {
"options": {
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"operator": {
"type": "string",
"operation": "exists",
"singleValue": true
},
"leftValue": "={{ $json.output.category }}",
"rightValue": ""
}
]
},
"renameOutput": true
},
{
"outputKey": "Unsubscribe",
"conditions": {
"options": {
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "9ad6f5cd-8c50-4710-8eaf-085e8f11f202",
"operator": {
"name": "filter.operator.equals",
"type": "string",
"operation": "equals"
},
"leftValue": "={{ $json.output.category }}",
"rightValue": "Unsubscribe"
}
]
},
"renameOutput": true
},
{
"outputKey": "Interested",
"conditions": {
"options": {
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "cb410bcc-a70c-4430-aec1-b71f3f615c4d",
"operator": {
"name": "filter.operator.equals",
"type": "string",
"operation": "equals"
},
"leftValue": "={{ $json.output.category }}",
"rightValue": "Interested"
}
]
},
"renameOutput": true
}
]
},
"options": {
"allMatchingOutputs": true
}
},
"typeVersion": 3
},
{
"id": "f9f23daa-f7a9-49f9-8ffb-16798656af73",
"name": "Sticky Note3",
"type": "n8n-nodes-base.stickyNote",
"position": [
260,
900
],
"parameters": {
"width": 480.38008828116847,
"height": 256.5682017131378,
"content": "### Save time by automatically unsubscribing leads that don't want to receive emails from you"
},
"typeVersion": 1
},
{
"id": "63c536bd-e624-4118-b0c8-38c07f2d1955",
"name": "Sticky Note4",
"type": "n8n-nodes-base.stickyNote",
"position": [
260,
1200
],
"parameters": {
"width": 480.38008828116847,
"height": 256.5682017131378,
"content": "### Mark interested leads as interested in lemlist"
},
"typeVersion": 1
},
{
"id": "8ed8b714-8196-4593-87b8-18c6a7318fbe",
"name": "Sticky Note5",
"type": "n8n-nodes-base.stickyNote",
"position": [
-880,
875.46282303881
],
"parameters": {
"width": 480.38008828116847,
"height": 608.2279357257166,
"content": "### Categorize the reply with OpenAI"
},
"typeVersion": 1
},
{
"id": "6b1846df-0214-4383-87cf-55232093ae2a",
"name": "Sticky Note6",
"type": "n8n-nodes-base.stickyNote",
"position": [
-1320,
880
],
"parameters": {
"width": 336.62085535637357,
"height": 311.3046602455328,
"content": "### This node will clean the text and make sure it looks pretty on Slack"
},
"typeVersion": 1
},
{
"id": "f7378ecd-e8d2-4204-a883-3161be601ffc",
"name": "Sticky Note7",
"type": "n8n-nodes-base.stickyNote",
"position": [
-220,
880
],
"parameters": {
"width": 336.62085535637357,
"height": 311.3046602455328,
"content": "### Trigger a different scenario according to the category of the reply"
},
"typeVersion": 1
}
],
"connections": {
"Merge data": {
"main": [
[
{
"node": "Route reply to the right branch",
"type": "main",
"index": 0
}
]
]
},
"OpenAI Chat Model": {
"ai_languageModel": [
[
{
"node": "Categorize lemlist reply",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Categorize lemlist reply": {
"main": [
[
{
"node": "Merge data",
"type": "main",
"index": 1
}
]
]
},
"Structured Output Parser": {
"ai_outputParser": [
[
{
"node": "Categorize lemlist reply",
"type": "ai_outputParser",
"index": 0
}
]
]
},
"Format text with Markdown": {
"main": [
[
{
"node": "Merge data",
"type": "main",
"index": 0
},
{
"node": "Categorize lemlist reply",
"type": "main",
"index": 0
}
]
]
},
"Lemlist Trigger - On new reply": {
"main": [
[
{
"node": "Format text with Markdown",
"type": "main",
"index": 0
}
]
]
},
"Route reply to the right branch": {
"main": [
[
{
"node": "Send alert to Slack",
"type": "main",
"index": 0
}
],
[
{
"node": "Lemlist - Unsubscribe",
"type": "main",
"index": 0
}
],
[
{
"node": "lemlist - Mark as interested",
"type": "main",
"index": 0
}
]
]
}
}
}
Pro
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How this works
Streamline your email outreach by automatically classifying replies from Lemlist campaigns using OpenAI's intelligent analysis, saving hours of manual sorting and enabling swift, personalised responses to boost engagement rates. This workflow suits sales teams or marketers handling high-volume cold emails, where quick reply triage turns leads into conversations without the tedium. The core step involves the Lemlist trigger capturing new replies, feeding them into OpenAI for classification—such as identifying interests, objections, or unsubscribes—before routing actions like Slack notifications or automated unsubscribes.
Use this when scaling Lemlist sequences with dozens of daily replies, needing AI-driven insights to prioritise hot leads over noise. Avoid it for low-volume or highly custom reply types, where manual review ensures nuance AI might miss. Common variations include swapping Slack for email alerts or adding branching logic to auto-reply to positive responses via Lemlist's API.
About this workflow
Classify Lemlist Replies Using Openai And Automate Reply Handling. Uses markdown, lemlistTrigger, stickyNote, lmChatOpenAi. Event-driven trigger; 18 nodes.
Source: https://github.com/Zie619/n8n-workflows — original creator credit. Request a take-down →
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