Incrementors This workflow corresponds to n8n.io template #16147 — we link there as the canonical source.
This workflow follows the Agent → Form Trigger 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": "Fx0ytkSOkBSHuM35",
"meta": {
"templateCredsSetupCompleted": true
},
"name": "Lecture to WhatsApp Study Digest",
"tags": [],
"nodes": [
{
"id": "6ae5434f-7bdd-482f-a05f-e379fc8d6e41",
"name": "Overview",
"type": "n8n-nodes-base.stickyNote",
"position": [
-2000,
-432
],
"parameters": {
"color": 4,
"width": 572,
"height": 1172,
"content": "## Lecture to WhatsApp Study Digest \u2014 WayinVideo Summarization + GPT-4o-mini + Twilio + Google Sheets\n\nFor college students who want an instant study digest from any lecture video \u2014 delivered to WhatsApp in minutes. A student submits a lecture URL via form along with their WhatsApp number, subject, and whether it is an exam revision session. The WayinVideo Summarization API processes the video and extracts a full summary with highlights and tags. After a 90-second initial wait, the results endpoint is polled every 30 seconds until status is SUCCEEDED. GPT-4o-mini reads the summary and generates 5 key learning points, 3 exam-important concepts, and one never-forget line. A Code node builds the formatted WhatsApp message. Twilio sends it directly to the student's WhatsApp number. Google Sheets logs the digest for future reference.\n\n## How it works\n- **1. Form \u2014 Student Request** collects name, WhatsApp number, subject name, lecture video URL (YouTube, Zoom, Vimeo, Loom), and exam revision flag\n- **2. Code \u2014 Validate and Prepare** validates required fields, formats the phone number for Twilio WhatsApp (whatsapp:+countrycode format), and sets the exam tag\n- **3. HTTP \u2014 WayinVideo Submit Summarization** posts the video URL to the WayinVideo Summarization API with Authorization Bearer header and API version header\n- **4. Wait \u2014 90 Seconds** gives WayinVideo initial processing time before first poll\n- **5. HTTP \u2014 WayinVideo Get Summary Results** polls the results endpoint using the task ID from node 3\n- **6. IF \u2014 Summary Ready?** checks if status equals SUCCEEDED \u2014 TRUE: proceeds to AI | FALSE: 30-second retry wait then re-polls\n- **7. Wait \u2014 30 Second Retry** waits before re-polling\n- **8. AI Agent \u2014 Generate Study Digest** uses GPT-4o-mini to extract 5 key points, 3 exam-important concepts, and one never-forget line from the summary\n- **OpenAI \u2014 GPT-4o-mini Model** language model attached to the AI Agent\n- **9. Code \u2014 Build WhatsApp Message** parses the AI output sections and builds the formatted WhatsApp message with separators and labels\n- **10. HTTP \u2014 Send WhatsApp via Twilio** and **11. Google Sheets \u2014 Save Digest** run in parallel \u2014 Twilio sends the WhatsApp message, Sheets logs the record\n\n## Set up steps\n1. Sign up at wayin.ai \u2192 Dashboard \u2192 API Keys \u2192 Create new key. Replace `YOUR_WAYINVIDEO_API_KEY` in nodes 3 and 5. Supported video sources: YouTube, Zoom, Vimeo, Loom\n2. In **OpenAI \u2014 GPT-4o-mini Model** \u2014 connect your OpenAI API credential\n3. Sign up at twilio.com. For testing use the WhatsApp Sandbox: Console \u2192 Messaging \u2192 Try it Out \u2192 WhatsApp (recipients must send the join code once). Replace `YOUR_TWILIO_ACCOUNT_SID` and `YOUR_TWILIO_AUTH_TOKEN` in node 10. Replace `YOUR_TWILIO_WHATSAPP_NUMBER` in node 10 (format: +1234567890)\n4. In **11. Google Sheets \u2014 Save Digest** \u2014 connect Google Sheets OAuth2 credential and replace `YOUR_GOOGLE_SHEET_ID`. Create a sheet tab named Lecture Digests with columns: Student, Phone, Subject, Video URL, Key Points, Exam Concepts, Exam Tag, Date"
},
"typeVersion": 1
},
{
"id": "2be14fcf-c8f9-4caa-810c-327d6d3894f5",
"name": "Section \u2014 Student Request Form and Data Preparation",
"type": "n8n-nodes-base.stickyNote",
"position": [
-1360,
-112
],
"parameters": {
"color": 5,
"width": 420,
"height": 388,
"content": "## Student Request Form and Data Preparation\nForm collects lecture URL, WhatsApp number, subject, and exam flag. Code validates inputs and formats the phone number for Twilio WhatsApp delivery."
},
"typeVersion": 1
},
{
"id": "65830ab0-f5a8-4e92-bece-17ab619b641b",
"name": "Section \u2014 WayinVideo Summarization Submit and Poll Loop",
"type": "n8n-nodes-base.stickyNote",
"position": [
-848,
-176
],
"parameters": {
"color": 6,
"width": 1012,
"height": 676,
"content": "## WayinVideo Summarization Submit and Poll Loop\nHTTP posts the video URL to WayinVideo. After 90s initial wait, results are polled every 30s until status equals SUCCEEDED. task ID referenced from node 3 output throughout the loop."
},
"typeVersion": 1
},
{
"id": "c96a2c28-00d2-4ddd-9085-a6ee4812216f",
"name": "Section \u2014 GPT-4o-mini Digest Generation and WhatsApp Message Build",
"type": "n8n-nodes-base.stickyNote",
"position": [
288,
-208
],
"parameters": {
"color": 6,
"width": 420,
"height": 772,
"content": "## GPT-4o-mini Digest Generation and WhatsApp Message Build\nGPT-4o-mini extracts 5 key points, 3 exam concepts, and one never-forget line from the summary. Code builds the formatted WhatsApp message with section separators."
},
"typeVersion": 1
},
{
"id": "b3fc9ebe-35c9-43f5-ba53-b9391e914438",
"name": "Section \u2014 WhatsApp Send and Sheets Log",
"type": "n8n-nodes-base.stickyNote",
"position": [
800,
-160
],
"parameters": {
"color": 4,
"width": 324,
"height": 580,
"content": "## WhatsApp Send and Sheets Log\nTwilio and Sheets run in parallel from node 9. Twilio sends the digest to the student WhatsApp number. Sheets logs the full record."
},
"typeVersion": 1
},
{
"id": "287af505-44bc-44a2-9782-c1632a32642b",
"name": "1. Form \u2014 Student Request",
"type": "n8n-nodes-base.formTrigger",
"position": [
-1328,
48
],
"parameters": {
"options": {},
"formTitle": "Lecture to WhatsApp Digest",
"formFields": {
"values": [
{
"fieldLabel": "Your Name",
"placeholder": "e.g. Rahul Sharma",
"requiredField": true
},
{
"fieldLabel": "WhatsApp Number",
"placeholder": "With country code \u2014 e.g. +919876543210",
"requiredField": true
},
{
"fieldLabel": "Subject Name",
"placeholder": "e.g. Thermodynamics, Machine Learning",
"requiredField": true
},
{
"fieldLabel": "Lecture Video URL",
"placeholder": "YouTube, Zoom, Vimeo or Loom link",
"requiredField": true
},
{
"fieldLabel": "Exam Revision?",
"placeholder": "Yes or No",
"requiredField": true
}
]
},
"formDescription": "Paste your professor's lecture URL. You will get 5 key points and 3 exam concepts on WhatsApp in minutes."
},
"typeVersion": 2.2
},
{
"id": "29454c6c-f33f-4c63-8aa6-c78e06266f73",
"name": "2. Code \u2014 Validate and Prepare",
"type": "n8n-nodes-base.code",
"position": [
-1088,
48
],
"parameters": {
"jsCode": "const row = $json;\n\nconst studentName = (row['Your Name'] || '').trim();\nconst phoneRaw = (row['WhatsApp Number'] || '').trim();\nconst subject = (row['Subject Name'] || '').trim();\nconst videoUrl = (row['Lecture Video URL'] || '').trim();\nconst examRevision = (row['Exam Revision?'] || 'No').trim();\n\nif (!studentName || !phoneRaw || !videoUrl) {\n throw new Error('Name, WhatsApp Number, and Video URL are required.');\n}\n\nlet phone = phoneRaw.replace(/[\\s\\-\\(\\)]/g, '');\nif (!phone.startsWith('+')) phone = '+' + phone;\nconst whatsappTo = 'whatsapp:' + phone;\n\nconst examTag = examRevision.toLowerCase() === 'yes' ? 'EXAM IMPORTANT' : 'Regular Lecture';\n\nreturn [{ json: { studentName, phone, whatsappTo, subject, videoUrl, examRevision, examTag } }];"
},
"typeVersion": 2
},
{
"id": "f32624ba-676a-45c8-82b1-edb9059ff75c",
"name": "3. HTTP \u2014 WayinVideo Submit Summarization",
"type": "n8n-nodes-base.httpRequest",
"position": [
-768,
48
],
"parameters": {
"url": "https://wayinvideo-api.wayin.ai/api/v2/summaries",
"method": "POST",
"options": {},
"jsonBody": "={\n \"video_url\": \"{{ $json.videoUrl }}\",\n \"target_lang\": \"en\"\n}",
"sendBody": true,
"sendHeaders": true,
"specifyBody": "json",
"headerParameters": {
"parameters": [
{
"name": "Authorization",
"value": "Bearer YOUR_WAYINVIDEO_API_KEY"
},
{
"name": "x-wayinvideo-api-version",
"value": "v2"
},
{
"name": "Content-Type",
"value": "application/json"
}
]
}
},
"typeVersion": 4.2
},
{
"id": "9c9d616f-a86f-498f-9b62-86d4bcb7ad1b",
"name": "4. Wait \u2014 90 Seconds",
"type": "n8n-nodes-base.wait",
"position": [
-528,
48
],
"parameters": {
"amount": 90
},
"typeVersion": 1.1
},
{
"id": "f577d160-4600-461a-9903-008c2ad06517",
"name": "5. HTTP \u2014 WayinVideo Get Summary Results",
"type": "n8n-nodes-base.httpRequest",
"position": [
-288,
48
],
"parameters": {
"url": "=https://wayinvideo-api.wayin.ai/api/v2/summaries/results/{{ $('3. HTTP \u2014 WayinVideo Submit Summarization').first().json.data.id }}",
"options": {},
"sendHeaders": true,
"headerParameters": {
"parameters": [
{
"name": "Authorization",
"value": "Bearer YOUR_WAYINVIDEO_API_KEY"
},
{
"name": "x-wayinvideo-api-version",
"value": "v2"
}
]
}
},
"typeVersion": 4.2
},
{
"id": "679f39b6-78c2-4fff-afd4-b789dd42a3df",
"name": "6. IF \u2014 Summary Ready?",
"type": "n8n-nodes-base.if",
"position": [
-48,
48
],
"parameters": {
"options": {},
"conditions": {
"options": {
"version": 1,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "loose"
},
"combinator": "and",
"conditions": [
{
"id": "status-check",
"operator": {
"type": "string",
"operation": "equals"
},
"leftValue": "={{ $json.data.status }}",
"rightValue": "SUCCEEDED"
}
]
}
},
"typeVersion": 2
},
{
"id": "828375e3-2cf9-4786-b606-18cb37a72517",
"name": "7. Wait \u2014 30 Second Retry",
"type": "n8n-nodes-base.wait",
"position": [
-48,
224
],
"parameters": {
"amount": 30
},
"typeVersion": 1.1
},
{
"id": "f89f1767-8a75-4ff9-86e6-af0b3005190c",
"name": "8. AI Agent \u2014 Generate Study Digest",
"type": "@n8n/n8n-nodes-langchain.agent",
"position": [
336,
32
],
"parameters": {
"text": "=Subject: {{ $('2. Code \u2014 Validate and Prepare').item.json.subject }}\n\nSummary:\n{{ $json.data.summary }}\n\nHighlights:\n{{ $json.data.highlights.map((h, i) => (i+1) + '. ' + h.desc).join('\\n') }}\n\nTags: {{ $json.data.tags.join(', ') }}",
"options": {
"systemMessage": "You are a college study coach. From the lecture summary provided, extract exactly:\n- 5 key learning points (one sentence each, max 20 words)\n- 3 exam-important concepts (concept name + why it is exam-important, max 20 words each)\n- One never-forget line (the single most important thing from this lecture)\n\nReturn in this EXACT format:\n\nKEY_POINTS:\n1. [point]\n2. [point]\n3. [point]\n4. [point]\n5. [point]\n\nEXAM_CONCEPTS:\n[Concept name] \u2014 [why exam important]\n[Concept name] \u2014 [why exam important]\n[Concept name] \u2014 [why exam important]\n\nNEVER_FORGET:\n[single most important line from this lecture]\n\nBe specific. Extract only from the summary provided. No invented content."
},
"promptType": "define"
},
"typeVersion": 1.9
},
{
"id": "d68b10ec-7bb6-40e1-a3ae-adec3cb8d12e",
"name": "OpenAI \u2014 GPT-4o-mini Model",
"type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
"position": [
336,
208
],
"parameters": {
"model": {
"__rl": true,
"mode": "list",
"value": "gpt-4o-mini"
},
"options": {},
"builtInTools": {}
},
"typeVersion": 1.3
},
{
"id": "e6b1a1f5-bd11-42a4-bbf1-ce78a5f934ce",
"name": "9. Code \u2014 Build WhatsApp Message",
"type": "n8n-nodes-base.code",
"position": [
576,
32
],
"parameters": {
"jsCode": "const output = $input.first().json.output || '';\n\nconst kpMatch = output.match(/KEY_POINTS:\\s*([\\s\\S]*?)(?=\\nEXAM_CONCEPTS:|$)/);\nconst ecMatch = output.match(/EXAM_CONCEPTS:\\s*([\\s\\S]*?)(?=\\nNEVER_FORGET:|$)/);\nconst nfMatch = output.match(/NEVER_FORGET:\\s*([\\s\\S]*)$/);\n\nconst keyPoints = kpMatch ? kpMatch[1].trim() : '';\nconst examConcepts = ecMatch ? ecMatch[1].trim() : '';\nconst neverForget = nfMatch ? nfMatch[1].trim() : '';\n\nconst ctx = $('2. Code \u2014 Validate and Prepare').item.json;\nconst subject = ctx.subject;\nconst examTag = ctx.examTag;\nconst whatsappTo = ctx.whatsappTo;\nconst studentName = ctx.studentName;\nconst phone = ctx.phone;\nconst videoUrl = ctx.videoUrl;\nconst examRevision = ctx.examRevision;\n\nconst message = [\n `*Study Digest \u2014 ${subject}*`,\n `${examTag}`,\n ``,\n `\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501`,\n `*5 KEY POINTS*`,\n `\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501`,\n keyPoints,\n ``,\n `\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501`,\n `*EXAM IMPORTANT*`,\n `\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501`,\n examConcepts,\n ``,\n `*NEVER FORGET:*`,\n neverForget\n].join('\\n');\n\nreturn [{ json: { message, keyPoints, examConcepts, neverForget, whatsappTo, studentName, phone, subject, videoUrl, examTag, examRevision } }];"
},
"typeVersion": 2
},
{
"id": "fcd8e680-98d8-417c-9346-4ecd56fd8c4b",
"name": "10. HTTP \u2014 Send WhatsApp via Twilio",
"type": "n8n-nodes-base.httpRequest",
"position": [
912,
0
],
"parameters": {
"url": "=https://api.twilio.com/2010-04-01/Accounts/YOUR_TWILIO_ACCOUNT_SID/Messages.json",
"method": "POST",
"options": {},
"sendBody": true,
"contentType": "form-urlencoded",
"sendHeaders": true,
"bodyParameters": {
"parameters": [
{
"name": "To",
"value": "={{ $json.whatsappTo }}"
},
{
"name": "From",
"value": "whatsapp:YOUR_TWILIO_WHATSAPP_NUMBER"
},
{
"name": "Body",
"value": "={{ $json.message }}"
}
]
},
"headerParameters": {
"parameters": [
{
"name": "Authorization",
"value": "=Basic {{ Buffer.from('YOUR_TWILIO_ACCOUNT_SID:YOUR_TWILIO_AUTH_TOKEN').toString('base64') }}"
},
{
"name": "Content-Type",
"value": "application/x-www-form-urlencoded"
}
]
}
},
"typeVersion": 4.2
},
{
"id": "a19c2591-1f8b-4910-9c23-fdaee07f8aa7",
"name": "11. Google Sheets \u2014 Save Digest",
"type": "n8n-nodes-base.googleSheets",
"position": [
912,
176
],
"parameters": {
"columns": {
"value": {
"Date": "={{ $now.toFormat('dd MMM yyyy HH:mm') }}",
"Phone": "={{ $('9. Code \u2014 Build WhatsApp Message').item.json.phone }}",
"Student": "={{ $('9. Code \u2014 Build WhatsApp Message').item.json.studentName }}",
"Subject": "={{ $('9. Code \u2014 Build WhatsApp Message').item.json.subject }}",
"Exam Tag": "={{ $('9. Code \u2014 Build WhatsApp Message').item.json.examTag }}",
"Video URL": "={{ $('9. Code \u2014 Build WhatsApp Message').item.json.videoUrl }}",
"Key Points": "={{ $('9. Code \u2014 Build WhatsApp Message').item.json.keyPoints }}",
"Exam Concepts": "={{ $('9. Code \u2014 Build WhatsApp Message').item.json.examConcepts }}"
},
"schema": [
{
"id": "Student",
"type": "string",
"display": true,
"required": false,
"displayName": "Student",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Phone",
"type": "string",
"display": true,
"required": false,
"displayName": "Phone",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Subject",
"type": "string",
"display": true,
"required": false,
"displayName": "Subject",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Video URL",
"type": "string",
"display": true,
"required": false,
"displayName": "Video URL",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Key Points",
"type": "string",
"display": true,
"required": false,
"displayName": "Key Points",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Exam Concepts",
"type": "string",
"display": true,
"required": false,
"displayName": "Exam Concepts",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Exam Tag",
"type": "string",
"display": true,
"required": false,
"displayName": "Exam Tag",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Date",
"type": "string",
"display": true,
"required": false,
"displayName": "Date",
"defaultMatch": false,
"canBeUsedToMatch": true
}
],
"mappingMode": "defineBelow",
"matchingColumns": [],
"attemptToConvertTypes": false,
"convertFieldsToString": true
},
"options": {},
"operation": "append",
"sheetName": {
"__rl": true,
"mode": "name",
"value": "Lecture Digests"
},
"documentId": {
"__rl": true,
"mode": "id",
"value": "YOUR_GOOGLE_SHEET_ID"
}
},
"typeVersion": 4.5
}
],
"active": false,
"settings": {
"binaryMode": "separate",
"executionOrder": "v1"
},
"versionId": "b415286c-1562-4526-9a29-b892d391c532",
"connections": {
"4. Wait \u2014 90 Seconds": {
"main": [
[
{
"node": "5. HTTP \u2014 WayinVideo Get Summary Results",
"type": "main",
"index": 0
}
]
]
},
"6. IF \u2014 Summary Ready?": {
"main": [
[
{
"node": "8. AI Agent \u2014 Generate Study Digest",
"type": "main",
"index": 0
}
],
[
{
"node": "7. Wait \u2014 30 Second Retry",
"type": "main",
"index": 0
}
]
]
},
"1. Form \u2014 Student Request": {
"main": [
[
{
"node": "2. Code \u2014 Validate and Prepare",
"type": "main",
"index": 0
}
]
]
},
"7. Wait \u2014 30 Second Retry": {
"main": [
[
{
"node": "5. HTTP \u2014 WayinVideo Get Summary Results",
"type": "main",
"index": 0
}
]
]
},
"OpenAI \u2014 GPT-4o-mini Model": {
"ai_languageModel": [
[
{
"node": "8. AI Agent \u2014 Generate Study Digest",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"2. Code \u2014 Validate and Prepare": {
"main": [
[
{
"node": "3. HTTP \u2014 WayinVideo Submit Summarization",
"type": "main",
"index": 0
}
]
]
},
"9. Code \u2014 Build WhatsApp Message": {
"main": [
[
{
"node": "10. HTTP \u2014 Send WhatsApp via Twilio",
"type": "main",
"index": 0
},
{
"node": "11. Google Sheets \u2014 Save Digest",
"type": "main",
"index": 0
}
]
]
},
"8. AI Agent \u2014 Generate Study Digest": {
"main": [
[
{
"node": "9. Code \u2014 Build WhatsApp Message",
"type": "main",
"index": 0
}
]
]
},
"5. HTTP \u2014 WayinVideo Get Summary Results": {
"main": [
[
{
"node": "6. IF \u2014 Summary Ready?",
"type": "main",
"index": 0
}
]
]
},
"3. HTTP \u2014 WayinVideo Submit Summarization": {
"main": [
[
{
"node": "4. Wait \u2014 90 Seconds",
"type": "main",
"index": 0
}
]
]
}
}
}
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About this workflow
This workflow collects a lecture video URL and student details via an n8n form, summarizes the video with the WayinVideo Summarization API, refines the output into a study digest with OpenAI GPT-4o-mini, then sends the digest to WhatsApp via Twilio and logs it to Google Sheets.…
Source: https://n8n.io/workflows/16147/ — original creator credit. Request a take-down →
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