Ankur Pata This workflow corresponds to n8n.io template #5846 — we link there as the canonical source.
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 →
{
"id": "bzmD4zsvg87yluOh",
"meta": {
"templateCredsSetupCompleted": true
},
"name": "For Demo on n8n",
"tags": [],
"nodes": [
{
"id": "8656e57f-3ad6-44a1-ad07-d2b896eea09f",
"name": "Slash Command Webhook",
"type": "n8n-nodes-base.webhook",
"position": [
-540,
340
],
"parameters": {
"path": "summarize",
"options": {},
"httpMethod": "POST"
},
"typeVersion": 1
},
{
"id": "b20487dc-7826-4a9a-9b88-2b4bf169be6a",
"name": "Parse Request",
"type": "n8n-nodes-base.code",
"position": [
-320,
340
],
"parameters": {
"jsCode": "const { text, user_id, channel_id, token, trigger_id } = $json.body;\nreturn { json: { channel_id, token, user_id } };"
},
"typeVersion": 2
},
{
"id": "aac2a2f0-a8ff-4f6c-9a97-f806f3819f65",
"name": "Fetch Unread Messages",
"type": "n8n-nodes-base.httpRequest",
"position": [
-100,
340
],
"parameters": {
"url": "https://slack.com/api/conversations.history",
"options": {},
"queryParametersUi": {
"parameter": [
{
"name": "channel",
"value": "={{ $json.channel_id }}"
},
{
"name": "limit",
"value": "20"
}
]
},
"headerParametersUi": {
"parameter": [
{
"name": "Authorization",
"value": "=Bearer {{$json.token}}"
}
]
}
},
"typeVersion": 1
},
{
"id": "860d23a9-f91e-412a-bed8-c4534ef5f55f",
"name": "Prepare Prompt for Claude",
"type": "n8n-nodes-base.code",
"position": [
120,
340
],
"parameters": {
"jsCode": "const messages = $json.messages || [];\nconst formatted = messages.map(m => `[${m.ts}] <@${m.user}>: ${m.text}`).join('\\n');\nreturn { json: { prompt: formatted, channel_id: $json.channel_id, token: $json.token, user_id: $json.user_id } };"
},
"typeVersion": 2
},
{
"id": "80e6757b-6090-4e55-b626-10e1f96c5f61",
"name": "Claude AI: Summarize",
"type": "@n8n/n8n-nodes-langchain.chainLlm",
"position": [
340,
340
],
"parameters": {
"messages": {
"messageValues": [
{
"message": "Summarize these Slack messages into grouped threads with brief summaries and 2\u20133 suggested replies for each."
}
]
}
},
"typeVersion": 1
},
{
"id": "693b8929-6d9e-4567-b1dc-261652148454",
"name": "Build Slack Blocks",
"type": "n8n-nodes-base.code",
"position": [
716,
340
],
"parameters": {
"jsCode": "const summary = $json.text;\nreturn { json: {\n channel: $json.channel_id,\n user: $json.user_id,\n token: $json.token,\n blocks: [\n { type: 'section', text: { type: 'mrkdwn', text: '*Here\\'s a summary:*\\n' + summary } }\n ]\n} };"
},
"typeVersion": 2
},
{
"id": "da7f7c7a-b121-4337-a854-abd3080af623",
"name": "Post to Slack (Ephemeral)",
"type": "n8n-nodes-base.httpRequest",
"position": [
936,
340
],
"parameters": {
"url": "https://slack.com/api/chat.postEphemeral",
"options": {},
"headerParametersUi": {
"parameter": [
{
"name": "Authorization",
"value": "=Bearer {{$json.token}}"
},
{
"name": "Content-Type",
"value": "application/json"
}
]
}
},
"typeVersion": 1
},
{
"id": "34257270-3be6-4625-b149-60704eeb6002",
"name": "Anthropic Chat Model",
"type": "@n8n/n8n-nodes-langchain.lmChatAnthropic",
"position": [
400,
560
],
"parameters": {
"model": {
"__rl": true,
"mode": "list",
"value": "claude-sonnet-4-20250514",
"cachedResultName": "Claude 4 Sonnet"
},
"options": {}
},
"credentials": {
"anthropicApi": {
"name": "<your credential>"
}
},
"typeVersion": 1.3
}
],
"active": false,
"settings": {
"executionOrder": "v1"
},
"versionId": "4f30f48a-ea02-4ae4-a096-348915971bde",
"connections": {
"Parse Request": {
"main": [
[
{
"node": "Fetch Unread Messages",
"type": "main",
"index": 0
}
]
]
},
"Build Slack Blocks": {
"main": [
[
{
"node": "Post to Slack (Ephemeral)",
"type": "main",
"index": 0
}
]
]
},
"Anthropic Chat Model": {
"ai_languageModel": [
[
{
"node": "Claude AI: Summarize",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Claude AI: Summarize": {
"main": [
[
{
"node": "Build Slack Blocks",
"type": "main",
"index": 0
}
]
]
},
"Fetch Unread Messages": {
"main": [
[
{
"node": "Prepare Prompt for Claude",
"type": "main",
"index": 0
}
]
]
},
"Slash Command Webhook": {
"main": [
[
{
"node": "Parse Request",
"type": "main",
"index": 0
}
]
]
},
"Prepare Prompt for Claude": {
"main": [
[
{
"node": "Claude AI: Summarize",
"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.
anthropicApi
For the full experience including quality scoring and batch install features for each workflow upgrade to Pro
About this workflow
Mello is a Claude-powered Slack assistant that helps you stay on top of unread messages across all your channels.
Source: https://n8n.io/workflows/5846/ — original creator credit. Request a take-down →
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