This workflow follows the Form Trigger → 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 →
{
"nodes": [
{
"id": "1a461b8a-090e-4dc4-a3d7-bf976a49828e",
"name": "Slack",
"type": "n8n-nodes-base.slack",
"position": [
1660,
200
],
"parameters": {
"text": "=\u2b50 Got a hot lead for you {{ $json.properties.first_name }} {{ $json.properties.last_name }} from {{ $json.company.properties.name }} ({{ $json.company.properties.domain }}) based out of {{ $json.company.properties.location.state }}, {{ $json.company.properties.location.country }}.\n\n\n{{ $('Score lead with MadKudu').item.json.properties.customer_fit.top_signals_formatted }}",
"select": "channel",
"channelId": {
"__rl": true,
"mode": "name",
"value": "#interesting_leads"
},
"otherOptions": {}
},
"credentials": {
"slackApi": {
"name": "<your credential>"
}
},
"typeVersion": 2.1
},
{
"id": "bcd8e7dc-cb7f-4e2b-a0c6-2d154cb58938",
"name": "n8n Form Trigger",
"type": "n8n-nodes-base.formTrigger",
"position": [
380,
420
],
"parameters": {
"path": "0bf8840f-1cc4-46a9-86af-a3fa8da80608",
"options": {},
"formTitle": "Contact us",
"formFields": {
"values": [
{
"fieldLabel": "What's your business email?"
}
]
},
"formDescription": "We'll get back to you soon"
},
"typeVersion": 2
},
{
"id": "c20c626f-fd58-497f-942f-5d10f198f36d",
"name": "Check if the email is valid",
"type": "n8n-nodes-base.if",
"position": [
800,
420
],
"parameters": {
"options": {},
"conditions": {
"options": {
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "54d84c8a-63ee-40ed-8fb2-301fff0194ba",
"operator": {
"name": "filter.operator.equals",
"type": "string",
"operation": "equals"
},
"leftValue": "={{ $json.status }}",
"rightValue": "valid"
}
]
}
},
"typeVersion": 2
},
{
"id": "9c55911c-06b7-4291-a91d-30c0cb87b7f2",
"name": "Sticky Note",
"type": "n8n-nodes-base.stickyNote",
"position": [
380,
220
],
"parameters": {
"color": 5,
"width": 547,
"height": 158,
"content": "### \ud83d\udc68\u200d\ud83c\udfa4 Setup\n1. Add you **MadKudu**, **Hunter**, and **Slack** credentials \n2. Set the Slack channel\n3. Click the Test Workflow button, enter your email and check the Slack channel\n4. Activate the workflow and use the form trigger production URL to collect your leads in a smart way "
},
"typeVersion": 1
},
{
"id": "c96096f2-6505-4955-bb1b-c4f903428b1d",
"name": "Sticky Note1",
"type": "n8n-nodes-base.stickyNote",
"position": [
380,
560
],
"parameters": {
"color": 7,
"width": 162,
"height": 139,
"content": "\ud83d\udc46 You can exchange this with any form you like (*e.g. Typeform, Google forms, Survey Monkey...*)"
},
"typeVersion": 1
},
{
"id": "751458aa-7b63-48ab-881e-d68df94a3390",
"name": "Sticky Note2",
"type": "n8n-nodes-base.stickyNote",
"position": [
1360,
500
],
"parameters": {
"color": 7,
"width": 162,
"height": 84,
"content": "\ud83d\udc46 Adjust the fit as you see necessary"
},
"typeVersion": 1
},
{
"id": "6416c2ee-59a0-4496-bd62-0a3af06986b7",
"name": "Email is not valid, do nothing",
"type": "n8n-nodes-base.noOp",
"position": [
1140,
560
],
"parameters": {},
"typeVersion": 1
},
{
"id": "b9ce2ee8-b816-497a-99af-faffdc99ee5f",
"name": "Score lead with MadKudu",
"type": "n8n-nodes-base.httpRequest",
"position": [
1140,
320
],
"parameters": {
"url": "=https://api.madkudu.com/v1/persons?email={{ $json.email }}",
"options": {},
"authentication": "genericCredentialType",
"genericAuthType": "httpHeaderAuth"
},
"credentials": {
"httpHeaderAuth": {
"name": "<your credential>"
}
},
"typeVersion": 4.1
},
{
"id": "0720ab51-5222-46fe-8a1a-31e25b81920c",
"name": "Verify email with Hunter",
"type": "n8n-nodes-base.hunter",
"position": [
600,
420
],
"parameters": {
"email": "={{ $json['What\\'s your business email?'] }}",
"operation": "emailVerifier"
},
"credentials": {
"hunterApi": {
"name": "<your credential>"
}
},
"typeVersion": 1
},
{
"id": "95ec00d2-d926-49ff-a604-1f2d0b291b6f",
"name": "Not interesting enough",
"type": "n8n-nodes-base.noOp",
"position": [
1660,
460
],
"parameters": {},
"typeVersion": 1
},
{
"id": "5dc270d5-29fd-4620-8ca4-84532cf49c34",
"name": "if customer fit score > 60",
"type": "n8n-nodes-base.if",
"position": [
1380,
320
],
"parameters": {
"options": {},
"conditions": {
"options": {
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "c23d7b34-a4ae-421f-bd7a-6a3ebb05aafe",
"operator": {
"type": "number",
"operation": "gt"
},
"leftValue": "={{ $json.properties.customer_fit.score }}",
"rightValue": 60
}
]
}
},
"typeVersion": 2
}
],
"connections": {
"n8n Form Trigger": {
"main": [
[
{
"node": "Verify email with Hunter",
"type": "main",
"index": 0
}
]
]
},
"Score lead with MadKudu": {
"main": [
[
{
"node": "if customer fit score > 60",
"type": "main",
"index": 0
}
]
]
},
"Verify email with Hunter": {
"main": [
[
{
"node": "Check if the email is valid",
"type": "main",
"index": 0
}
]
]
},
"if customer fit score > 60": {
"main": [
[
{
"node": "Slack",
"type": "main",
"index": 0
}
],
[
{
"node": "Not interesting enough",
"type": "main",
"index": 0
}
]
]
},
"Check if the email is valid": {
"main": [
[
{
"node": "Score lead with MadKudu",
"type": "main",
"index": 0
}
],
[
{
"node": "Email is not valid, do nothing",
"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.
httpHeaderAuthhunterApislackApi
For the full experience including quality scoring and batch install features for each workflow upgrade to Pro
How this works
This workflow empowers sales and marketing teams to swiftly uncover professional email addresses for promising leads mentioned in Slack conversations, saving hours of manual research and boosting outreach efficiency. It activates when a team member shares a prospect's name or company in a designated Slack channel, automatically querying the Hunter.io database to retrieve verified contact details. The key step involves validating the discovered email through a conditional check, ensuring only high-quality leads proceed to scoring with MadKudu for prioritisation, while integrating seamlessly with Slack and form inputs for easy team collaboration.
Use this workflow when your team frequently discusses leads in Slack and needs rapid email enrichment to fuel personalised campaigns, particularly in B2B environments with high-volume prospecting. Avoid it for scenarios requiring GDPR-compliant data handling or when leads involve sensitive personal information, as it focuses on professional contacts only. Common variations include adding CRM integrations like HubSpot to auto-log scored leads or expanding the trigger to monitor multiple Slack channels for broader coverage.
About this workflow
Slack Hunter. Uses slack, formTrigger, stickyNote, noOp. Event-driven trigger; 11 nodes.
Source: https://github.com/Zie619/n8n-workflows — original creator credit. Request a take-down →
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