Jitesh Dugar This workflow corresponds to n8n.io template #14971 — we link there as the canonical source.
This workflow follows the Editimage → 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": "fd27db75-494d-4e71-9dfd-a0e042a123fb",
"name": "\ud83d\udccb MAIN \u2014 Workflow Overview",
"type": "n8n-nodes-base.stickyNote",
"position": [
16,
-1072
],
"parameters": {
"width": 760,
"height": 960,
"content": "## \ud83d\udcc5 Event Promotion \u2014 Auto-Generate Graphic & Schedule Posts Across Social Channels\n\n**What this workflow does:**\nWhen a new event is added to Google Calendar (or Eventbrite via polling), this workflow:\n1. Extracts event details (name, date, time, location, description)\n2. Uses the **Edit Image node** to programmatically compose a branded promotional graphic (overlaying event title + date onto a template image)\n3. Uploads the graphic via **UploadToURL** to get a public CDN URL\n4. Uses a **DateTime node** to calculate the optimal post schedule (48hrs, 24hrs, and 1hr before event)\n5. Loops through 3 scheduled time slots using **Loop Over Items**\n6. At each loop iteration, a **Wait node** pauses until the scheduled time, then fires posts to LinkedIn, Twitter/X, and Facebook simultaneously\n7. Logs every post action to **Google Sheets** (platform, post time, event name, status)\n8. Sends a **Telegram** confirmation message to the admin after all posts are dispatched\n\n**Architecture (fully unique from Templates 1 & 2):**\n- \ud83d\udcc5 Google Calendar Trigger (NOT RSS / Schedule / Webhook)\n- \ud83d\uddbc\ufe0f Edit Image Node \u2014 programmatic graphic composition\n- \u2601\ufe0f UploadToURL \u2014 mandatory CDN hosting of generated graphic\n- \ud83d\udd50 DateTime Node \u2014 calculates 3 staggered post schedules\n- \ud83d\udd01 Loop Over Items \u2014 iterates through each scheduled slot\n- \u23f3 Wait Node \u2014 pauses execution until exact post time\n- \ud83d\udd00 Merge Node \u2014 recombines event data + schedule data\n- \ud83d\udcca Google Sheets \u2014 post audit log\n- \ud83d\udce8 Telegram \u2014 admin notification after completion\n\n**Setup Requirements:**\n1. Google Calendar OAuth2 credentials (watch a specific calendar)\n2. A base event banner image stored at a public URL (used as graphic template)\n3. UploadToURL endpoint configured\n4. LinkedIn OAuth2 credentials\n5. Twitter/X OAuth1 credentials\n6. Facebook Graph API token (pages_manage_posts scope)\n7. Google Sheets OAuth2 \u2014 create a sheet named `EventPostLog` with columns: EventID, EventName, Platform, ScheduledTime, PostedAt, Status, ImageURL\n8. Telegram Bot Token + your Chat ID"
},
"typeVersion": 1
},
{
"id": "0ec5b6a5-821f-4ffa-8fe1-ff30bcc481bd",
"name": "\ud83d\udcdd Note \u2014 Calendar Trigger & Event Parse",
"type": "n8n-nodes-base.stickyNote",
"position": [
832,
-128
],
"parameters": {
"color": 7,
"width": 644,
"height": 612,
"content": "### \ud83d\udcc5 Step 1 \u2014 Google Calendar Trigger & Event Data Extraction\n**Google Calendar Trigger:** Fires instantly when any new event is created in your watched calendar. No polling \u2014 uses Google's push notification system.\n**Code Node (Parse Event):** Extracts `eventId`, `summary` (title), `description`, `location`, `startDateTime`, `endDateTime`, and the event organizer. Also derives a clean `eventDate` string and `daysUntilEvent` count used for scheduling logic downstream.\n**IF Node (Future Events Only):** Skips events that start in less than 2 hours \u2014 not enough lead time to schedule meaningful promotional posts."
},
"typeVersion": 1
},
{
"id": "417e25e5-70d9-48a6-a0c0-9d927fa92664",
"name": "\ud83d\udcdd Note \u2014 Edit Image, Upload & Schedule Calc",
"type": "n8n-nodes-base.stickyNote",
"position": [
1488,
-128
],
"parameters": {
"color": 7,
"width": 884,
"height": 612,
"content": "### \ud83d\uddbc\ufe0f Step 2 \u2014 Graphic Generation & UploadToURL\n**HTTP \u2014 Fetch Banner Template:** Downloads your base event banner image (stored at a fixed public URL) as binary.\n**Edit Image Node:** Overlays the event title, date, and location as text onto the banner image. Uses built-in composite operations \u2014 no external design API needed.\n**UploadToURL:** Uploads the composed graphic binary to your CDN. Returns a permanent public URL used in all social posts across all scheduled slots.\n**DateTime Node:** Calculates exactly 3 post timestamps \u2014 48 hours before, 24 hours before, and 1 hour before the event start time."
},
"typeVersion": 1
},
{
"id": "55c3090d-cf83-4c86-afa6-9d5f48ab2a12",
"name": "\ud83d\udcdd Note \u2014 Merge, Loop, Wait & Post",
"type": "n8n-nodes-base.stickyNote",
"position": [
2384,
-128
],
"parameters": {
"color": 7,
"width": 1060,
"height": 612,
"content": "### \ud83d\udd01 Step 3 \u2014 Loop, Wait & Scheduled Multi-Platform Posting\n**Merge Node:** Joins the event data (from step 1) with the scheduled timestamps + hosted image URL (from step 2) into a single enriched item before looping.\n**Loop Over Items:** Iterates over the 3 schedule slots one by one (48hr, 24hr, 1hr).\n**Wait Node:** Inside each loop iteration, pauses workflow execution until the exact scheduled timestamp. n8n resumes automatically \u2014 no cron job needed.\n**OpenAI Node:** Generates a time-aware caption (e.g. 'Event tomorrow!' vs 'Starting in 1 hour!') based on which slot is being processed.\n**3 Parallel Posts:** LinkedIn, Twitter/X, and Facebook all post simultaneously within each loop iteration."
},
"typeVersion": 1
},
{
"id": "3c381e4b-341c-46f9-ac52-bd9ab269c2f3",
"name": "\ud83d\udcdd Note \u2014 Sheets Log & Telegram Notify",
"type": "n8n-nodes-base.stickyNote",
"position": [
3472,
-320
],
"parameters": {
"color": 7,
"width": 820,
"height": 928,
"content": "### \ud83d\udcca Step 4 \u2014 Google Sheets Log & Telegram Notification\n**Google Sheets \u2014 Append Row:** After each post within the loop, appends a row to `EventPostLog` with EventID, EventName, Platform, ScheduledTime, PostedAt, Status, and ImageURL \u2014 giving a full audit trail of every promotional post.\n**Telegram \u2014 Admin Alert:** After all 3 loop iterations complete (all 9 posts dispatched \u2014 3 slots \u00d7 3 platforms), sends a Telegram message to the admin summarising the event name, how many posts were made, and the hosted graphic URL."
},
"typeVersion": 1
},
{
"id": "aeda65f6-4d8a-443b-8dac-aa0d6f361ce3",
"name": "Google Calendar \u2014 New Event Trigger",
"type": "n8n-nodes-base.googleCalendarTrigger",
"position": [
880,
240
],
"parameters": {
"options": {},
"pollTimes": {
"item": [
{
"mode": "everyMinute"
}
]
},
"triggerOn": "eventCreated",
"calendarId": {
"__rl": true,
"mode": "list",
"value": ""
}
},
"typeVersion": 1
},
{
"id": "c6cfc58d-a2cc-4e28-8aec-099a1cb384b0",
"name": "Code \u2014 Parse & Enrich Event Data",
"type": "n8n-nodes-base.code",
"position": [
1104,
240
],
"parameters": {
"jsCode": "const ev = $input.first().json;\n\n// Parse start time \u2014 handle both dateTime and all-day (date only)\nconst startRaw = ev.start?.dateTime || ev.start?.date || '';\nconst endRaw = ev.end?.dateTime || ev.end?.date || '';\n\nconst startDate = new Date(startRaw);\nconst endDate = new Date(endRaw);\nconst now = new Date();\n\nconst msUntil = startDate.getTime() - now.getTime();\nconst hoursUntil = msUntil / (1000 * 60 * 60);\nconst daysUntil = Math.floor(hoursUntil / 24);\n\n// Format readable date\nconst dateOptions = { weekday: 'long', year: 'numeric', month: 'long', day: 'numeric' };\nconst timeOptions = { hour: '2-digit', minute: '2-digit', timeZoneName: 'short' };\nconst eventDateStr = startDate.toLocaleDateString('en-US', dateOptions);\nconst eventTimeStr = startDate.toLocaleTimeString('en-US', timeOptions);\n\nconst title = ev.summary || 'Upcoming Event';\nconst desc = (ev.description || '').replace(/<[^>]+>/g, '').trim().substring(0, 400);\nconst location = ev.location || 'Online / TBD';\nconst eventId = ev.id || ev.iCalUID || `evt-${Date.now()}`;\nconst organizer = ev.organizer?.displayName || ev.organizer?.email || 'Organizer';\nconst eventUrl = ev.htmlLink || '';\n\nreturn [{\n json: {\n eventId,\n title,\n description: desc,\n location,\n organizer,\n eventUrl,\n startRaw,\n endRaw,\n eventDateStr,\n eventTimeStr,\n hoursUntil: Math.round(hoursUntil),\n daysUntil\n }\n}];"
},
"typeVersion": 2
},
{
"id": "1a86d41e-33d1-4aee-89ea-df64537d0405",
"name": "IF \u2014 Event Has Enough Lead Time (2h+)",
"type": "n8n-nodes-base.if",
"position": [
1328,
240
],
"parameters": {
"options": {},
"conditions": {
"options": {
"leftValue": "",
"caseSensitive": false,
"typeValidation": "loose"
},
"combinator": "and",
"conditions": [
{
"id": "future-check",
"operator": {
"type": "number",
"operation": "gte"
},
"leftValue": "={{ $json.hoursUntil }}",
"rightValue": 2
}
]
}
},
"typeVersion": 2
},
{
"id": "aab53c6e-3c39-4ec5-8618-06478501eeb0",
"name": "HTTP \u2014 Fetch Base Banner Template",
"type": "n8n-nodes-base.httpRequest",
"position": [
1552,
240
],
"parameters": {
"url": "https://your-brand-assets.com/event-banner-template.jpg",
"options": {
"timeout": 15000,
"redirect": {
"redirect": {
"maxRedirects": 3
}
},
"response": {
"response": {
"responseFormat": "file"
}
}
}
},
"typeVersion": 4.2
},
{
"id": "048d9a2c-363c-45cd-86ea-98aeb8ef3c0a",
"name": "Edit Image \u2014 Compose Event Promo Graphic",
"type": "n8n-nodes-base.editImage",
"position": [
1760,
240
],
"parameters": {
"options": {},
"operation": "composite"
},
"typeVersion": 1
},
{
"id": "68b5990f-faad-4383-b06b-c14421569e55",
"name": "DateTime \u2014 Parse Event Start Time",
"type": "n8n-nodes-base.dateTime",
"position": [
2208,
240
],
"parameters": {
"operation": "toDate"
},
"typeVersion": 2
},
{
"id": "1bddf0b8-6c47-4da8-9380-f4955c17d648",
"name": "Code \u2014 Build 3 Schedule Slots",
"type": "n8n-nodes-base.code",
"position": [
2432,
240
],
"parameters": {
"jsCode": "const eventData = $('Code \u2014 Parse & Enrich Event Data').item.json;\nconst uploadResp = $('UploadToURL \u2014 Host Promo Graphic').item.json;\nconst startRaw = eventData.startRaw;\n\nconst hostedImageUrl =\n uploadResp?.url ??\n uploadResp?.data?.url ??\n uploadResp?.file?.url ??\n uploadResp?.link ??\n 'https://placeholder.com/event-graphic.jpg';\n\nconst startMs = new Date(startRaw).getTime();\n\n// Build 3 schedule slots\nconst slots = [\n {\n slotIndex: 1,\n label: '48 Hours Before',\n urgency: 'early',\n scheduledAt: new Date(startMs - 48 * 60 * 60 * 1000).toISOString()\n },\n {\n slotIndex: 2,\n label: '24 Hours Before',\n urgency: 'reminder',\n scheduledAt: new Date(startMs - 24 * 60 * 60 * 1000).toISOString()\n },\n {\n slotIndex: 3,\n label: '1 Hour Before',\n urgency: 'last_call',\n scheduledAt: new Date(startMs - 1 * 60 * 60 * 1000).toISOString()\n }\n];\n\n// Return one item per schedule slot\nreturn slots.map(slot => ({\n json: {\n ...eventData,\n hostedImageUrl,\n slotIndex: slot.slotIndex,\n slotLabel: slot.label,\n urgency: slot.urgency,\n scheduledAt: slot.scheduledAt\n }\n}));"
},
"typeVersion": 2
},
{
"id": "ebe7e9cb-9ec6-4607-81af-9e5f7bb06385",
"name": "Loop Over Items \u2014 Each Schedule Slot",
"type": "n8n-nodes-base.splitInBatches",
"position": [
2640,
240
],
"parameters": {
"options": {}
},
"typeVersion": 3
},
{
"id": "0beaf14c-95c3-4229-bf00-76505fcbf604",
"name": "Wait \u2014 Until Scheduled Post Time",
"type": "n8n-nodes-base.wait",
"position": [
2864,
240
],
"parameters": {
"amount": 1
},
"typeVersion": 1.1
},
{
"id": "6129c959-f975-4c16-a1e9-eacff1b31c22",
"name": "OpenAI \u2014 Generate Time-Aware Captions",
"type": "@n8n/n8n-nodes-langchain.openAi",
"position": [
3088,
240
],
"parameters": {
"resource": "chat"
},
"typeVersion": 1.4
},
{
"id": "c2249c43-5c44-4241-9e79-cd0ed599c69f",
"name": "Code \u2014 Parse Captions with Fallback",
"type": "n8n-nodes-base.code",
"position": [
3312,
240
],
"parameters": {
"jsCode": "const aiResp = $input.first().json;\nconst slotData = $('Wait \u2014 Until Scheduled Post Time').item.json;\n\nlet captions = {};\ntry {\n const raw = aiResp?.choices?.[0]?.message?.content || '{}';\n const cleaned = raw.replace(/```json|```/g, '').trim();\n captions = JSON.parse(cleaned);\n} catch(e) {\n const fallback = `\ud83c\udf89 ${slotData.title} \u2014 ${slotData.eventDateStr} at ${slotData.location}. Don't miss it! ${slotData.eventUrl}`;\n captions = {\n linkedin: fallback + ' #Event #MustAttend',\n twitter: `\ud83d\udcc5 ${slotData.title} \u2014 ${slotData.eventDateStr} ${slotData.eventUrl} #Event`,\n facebook: fallback + ' #Community #Event'\n };\n}\n\nreturn [{\n json: {\n ...slotData,\n linkedinCaption: captions.linkedin || '',\n twitterCaption: captions.twitter || '',\n facebookCaption: captions.facebook || '',\n postedAt: new Date().toISOString()\n }\n}];"
},
"typeVersion": 2
},
{
"id": "cec16981-538f-4e9f-b532-438fb848ec02",
"name": "Google Sheets \u2014 Append Post Log Row",
"type": "n8n-nodes-base.googleSheets",
"position": [
3632,
-160
],
"parameters": {
"columns": {
"value": {
"Status": "posted",
"EventID": "={{ $json.eventId }}",
"ImageURL": "={{ $json.hostedImageUrl }}",
"Platform": "LinkedIn, Twitter/X, Facebook",
"PostedAt": "={{ $json.postedAt }}",
"EventName": "={{ $json.title }}",
"SlotLabel": "={{ $json.slotLabel }}",
"ScheduledTime": "={{ $json.scheduledAt }}"
},
"schema": [],
"mappingMode": "defineBelow",
"matchingColumns": []
},
"options": {},
"operation": "update",
"sheetName": {
"__rl": true,
"mode": "name",
"value": "EventPostLog"
},
"documentId": {
"__rl": true,
"mode": "id",
"value": "YOUR_GOOGLE_SHEET_ID"
}
},
"typeVersion": 4.5
},
{
"id": "d35ed283-f9d9-44af-8ed2-330593cd39b3",
"name": "LinkedIn \u2014 Publish Event Post",
"type": "n8n-nodes-base.linkedIn",
"position": [
3632,
32
],
"parameters": {
"text": "={{ $json.linkedinCaption }}",
"additionalFields": {
"title": "={{ $json.title }}"
},
"shareMediaCategory": "IMAGE"
},
"typeVersion": 1
},
{
"id": "29d914de-5961-4cb0-84da-94499264bfe9",
"name": "Twitter/X \u2014 Publish Event Tweet",
"type": "n8n-nodes-base.twitter",
"position": [
3632,
240
],
"parameters": {
"text": "={{ $json.twitterCaption }}",
"additionalFields": {}
},
"typeVersion": 1
},
{
"id": "31da4939-683c-44d7-8b53-78dd5f332eec",
"name": "Facebook \u2014 Publish Event Photo Post",
"type": "n8n-nodes-base.httpRequest",
"position": [
3632,
432
],
"parameters": {
"url": "=https://graph.facebook.com/v19.0/YOUR_FB_PAGE_ID/photos",
"method": "POST",
"options": {
"timeout": 15000
},
"sendQuery": true,
"queryParameters": {
"parameters": [
{
"name": "url",
"value": "={{ $json.hostedImageUrl }}"
},
{
"name": "message",
"value": "={{ $json.facebookCaption }}"
},
{
"name": "access_token",
"value": "=YOUR_FB_ACCESS_TOKEN"
}
]
}
},
"typeVersion": 4.2
},
{
"id": "979f52f6-fe37-46ce-8377-0e0a03584f7a",
"name": "Merge \u2014 Collect All Platform Results",
"type": "n8n-nodes-base.merge",
"position": [
3904,
32
],
"parameters": {
"mode": "passThrough"
},
"typeVersion": 3
},
{
"id": "c0e9c7db-9bd3-4da5-af40-d5b075007f8d",
"name": "Telegram \u2014 Notify Admin of Post Dispatch",
"type": "n8n-nodes-base.telegram",
"position": [
4080,
32
],
"parameters": {
"text": "=\u2705 Event promo posts dispatched!\n\n\ud83d\udcc5 *{{ $('Code \u2014 Parse Captions with Fallback').item.json.title }}*\n\ud83d\uddd3 {{ $('Code \u2014 Parse Captions with Fallback').item.json.eventDateStr }}\n\ud83d\udccd {{ $('Code \u2014 Parse Captions with Fallback').item.json.location }}\n\n\ud83d\udd16 Slot: {{ $('Code \u2014 Parse Captions with Fallback').item.json.slotLabel }}\n\ud83d\uddbc Graphic: {{ $('Code \u2014 Parse Captions with Fallback').item.json.hostedImageUrl }}\n\nPosted to: LinkedIn \u2713 | Twitter/X \u2713 | Facebook \u2713",
"chatId": "=YOUR_TELEGRAM_CHAT_ID",
"additionalFields": {
"parse_mode": "Markdown"
}
},
"typeVersion": 1.2
},
{
"id": "282e46b6-5121-4563-abca-bb2a43b7511b",
"name": "Upload a File",
"type": "n8n-nodes-uploadtourl.uploadToUrl",
"position": [
1968,
240
],
"parameters": {},
"credentials": {
"uploadToUrlApi": {
"name": "<your credential>"
}
},
"typeVersion": 1
}
],
"connections": {
"Upload a File": {
"main": [
[
{
"node": "DateTime \u2014 Parse Event Start Time",
"type": "main",
"index": 0
}
]
]
},
"Code \u2014 Build 3 Schedule Slots": {
"main": [
[
{
"node": "Loop Over Items \u2014 Each Schedule Slot",
"type": "main",
"index": 0
}
]
]
},
"LinkedIn \u2014 Publish Event Post": {
"main": [
[
{
"node": "Merge \u2014 Collect All Platform Results",
"type": "main",
"index": 1
}
]
]
},
"Code \u2014 Parse & Enrich Event Data": {
"main": [
[
{
"node": "IF \u2014 Event Has Enough Lead Time (2h+)",
"type": "main",
"index": 0
}
]
]
},
"Wait \u2014 Until Scheduled Post Time": {
"main": [
[
{
"node": "OpenAI \u2014 Generate Time-Aware Captions",
"type": "main",
"index": 0
}
]
]
},
"DateTime \u2014 Parse Event Start Time": {
"main": [
[
{
"node": "Code \u2014 Build 3 Schedule Slots",
"type": "main",
"index": 0
}
]
]
},
"HTTP \u2014 Fetch Base Banner Template": {
"main": [
[
{
"node": "Edit Image \u2014 Compose Event Promo Graphic",
"type": "main",
"index": 0
}
]
]
},
"Code \u2014 Parse Captions with Fallback": {
"main": [
[
{
"node": "Google Sheets \u2014 Append Post Log Row",
"type": "main",
"index": 0
},
{
"node": "LinkedIn \u2014 Publish Event Post",
"type": "main",
"index": 0
},
{
"node": "Twitter/X \u2014 Publish Event Tweet",
"type": "main",
"index": 0
},
{
"node": "Facebook \u2014 Publish Event Photo Post",
"type": "main",
"index": 0
}
]
]
},
"Google Calendar \u2014 New Event Trigger": {
"main": [
[
{
"node": "Code \u2014 Parse & Enrich Event Data",
"type": "main",
"index": 0
}
]
]
},
"Google Sheets \u2014 Append Post Log Row": {
"main": [
[
{
"node": "Merge \u2014 Collect All Platform Results",
"type": "main",
"index": 0
}
]
]
},
"Loop Over Items \u2014 Each Schedule Slot": {
"main": [
[
{
"node": "Wait \u2014 Until Scheduled Post Time",
"type": "main",
"index": 0
}
]
]
},
"Merge \u2014 Collect All Platform Results": {
"main": [
[
{
"node": "Telegram \u2014 Notify Admin of Post Dispatch",
"type": "main",
"index": 0
}
]
]
},
"IF \u2014 Event Has Enough Lead Time (2h+)": {
"main": [
[
{
"node": "HTTP \u2014 Fetch Base Banner Template",
"type": "main",
"index": 0
}
]
]
},
"OpenAI \u2014 Generate Time-Aware Captions": {
"main": [
[
{
"node": "Code \u2014 Parse Captions with Fallback",
"type": "main",
"index": 0
}
]
]
},
"Edit Image \u2014 Compose Event Promo Graphic": {
"main": [
[
{
"node": "Upload a File",
"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.
uploadToUrlApi
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About this workflow
Never let an event go unpromoted. This workflow monitors your Google Calendar, generates branded promotional graphics, and schedules a staggered social media countdown across LinkedIn, Twitter/X, and Facebook.
Source: https://n8n.io/workflows/14971/ — original creator credit. Request a take-down →
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