{ "meta": { "versionId": "1.0.0", "createdAt": "2025-09-29T07:08:00.958684", "updatedAt": "2025-09-29T07:08:00.958702", "owner": "n8n-user", "license": "MIT", "category": "automation", "status": "active", "priority": "high", "environment": "production" }, "nodes": [ { "id": "c02e3038-96e8-4bfe-a4fa-925207fef0ee", "name": "Create data pix", "type": "n8n-nodes-base.set", "position": [ 220, 0 ], "parameters": { "options": {}, "assignments": { "assignments": [ { "id": "ab15b0f8-c40f-4874-8724-ddae8f99e646", "name": "data", "type": "string", "value": "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAAYdEVYdFNvZnR3YXJlAFBhaW50Lk5FVCA1LjEuMvu8A7YAAAC2ZVhJZklJKgAIAAAABQAaAQUAAQAAAEoAAAAbAQUAAQAAAFIAAAAoAQMAAQAAAAIAAAAxAQIAEAAAAFoAAABphwQAAQAAAGoAAAAAAAAAYAAAAAEAAABgAAAAAQAAAFBhaW50Lk5FVCA1LjEuMgADAACQBwAEAAAAMDIzMAGgAwABAAAAAQAAAAWgBAABAAAAlAAAAAAAAAACAAEAAgAEAAAAUjk4AAIABwAEAAAAMDEwMAAAAADp1fY4ytpsegAAAA1JREFUGFdjYGBgYAAAAAUAAYoz4wAAAAAASUVORK5CYII=" } ] } }, "typeVersion": 3.4, "notes": "This set node performs automated tasks as part of the workflow." }, { "id": "09573a6a-88e8-48c5-a78e-d45fb37a8b87", "name": "Create img bin", "type": "n8n-nodes-base.convertToFile", "position": [ 440, 0 ], "parameters": { "options": { "mimeType": "image/png" }, "operation": "toBinary", "sourceProperty": "data", "binaryPropertyName": "pixel" }, "typeVersion": 1.1, "notes": "This convertToFile node performs automated tasks as part of the workflow." }, { "id": "07c42dab-9b60-4f51-b8ab-78df26bc2cdd", "name": "Respond to Webhook", "type": "n8n-nodes-base.respondToWebhook", "position": [ 660, 0 ], "parameters": { "options": {}, "respondWith": "binary" }, "typeVersion": 1.1, "notes": "This respondToWebhook node performs automated tasks as part of the workflow." }, { "id": "cb0df6bc-d733-4e07-9506-c413d390e482", "name": "Request img", "type": "n8n-nodes-base.webhook", "position": [ 0, 0 ], "webhookId": "db4880e7-2134-4994-94e5-a4a3aa120440", "parameters": { "path": "db4880e7-2134-4994-94e5-a4a3aa120440", "options": {}, "responseMode": "responseNode" }, "typeVersion": 2, "notes": "This webhook node performs automated tasks as part of the workflow." }, { "id": "b7153f9a-f635-48c4-b8fe-d9e93deb33ed", "name": "Do anything to log", "type": "n8n-nodes-base.noOp", "position": [ 660, 200 ], "parameters": {}, "typeVersion": 1, "notes": "This noOp node performs automated tasks as part of the workflow." }, { "id": "d5e4143c-f321-4632-9adf-e95ca718210f", "name": "Sticky Note", "type": "n8n-nodes-base.stickyNote", "position": [ -80, 360 ], "parameters": { "width": 980, "height": 1280, "content": "## 📬 Workflow: Transparent Tracking Pixel for Email Open Detection\n\n### 📌 Description\nThis workflow serves a **1x1 transparent PNG image** via a webhook, which can be embedded in an email to **track when the email is opened**. When the image is loaded by the recipient's email client, the webhook is triggered, optionally capturing a `userId` to identify who opened the email.\n\n---\n\n### 📂 Workflow Steps\n\n1. **Webhook Trigger** (`Request img`)\n - **Path:** `/webhook/change-with-your-id`\n - Triggered by an HTTP request (e.g. when the image is loaded in an email).\n - Accepts a query parameter `id` to identify the recipient.\n\n2. **Set Base64 Data** (`Create data pix`)\n - Creates a variable `data` containing a Base64-encoded transparent PNG image (1x1 pixel).\n\n3. **Convert to Binary** (`Create img bin`)\n - Converts the Base64 `data` string into a binary file.\n - Sets MIME type to `image/png`.\n\n4. **Respond to Webhook** (`Respond to Webhook`)\n - Sends the binary image file in the HTTP response.\n\n5. **Logging** (`Do anything to log`)\n - Placeholder node to log or process the `id` or request metadata.\n - You can access the `id` using `{{$json[\"query\"][\"id\"]}}`.\n - You can also use any parameter you want\n\n---\n\n### ✉️ How to Use in Emails\n\nEmbed the image in an HTML email like this:\n\n```html\n/webhook/db4880e7-2134-4994-94e5-a4a3aa120440?id=1234\" width=\"1\" height=\"1\" style=\"display:none;\" alt=\"\" />\n```\n\nWhen the email is opened and the image is loaded, the workflow will be triggered.\n\n---\n\n### 🛠️ Notes\n- Some email clients block images by default; this may prevent tracking.\n- You can enhance the workflow to store open events in a database, log the timestamp, IP, or user agent.\n- Make sure to comply with data privacy and consent regulations (e.g. GDPR)." }, "typeVersion": 1, "notes": "This stickyNote node performs automated tasks as part of the workflow." } ], "pinData": {}, "connections": { "07c42dab-9b60-4f51-b8ab-78df26bc2cdd": { "main": [ [ { "node": "error-handler-07c42dab-9b60-4f51-b8ab-78df26bc2cdd", "type": "main", "index": 0 } ], [ { "node": "error-handler-07c42dab-9b60-4f51-b8ab-78df26bc2cdd-33b245a8", "type": "main", "index": 0 } ], [ { "node": "error-handler-07c42dab-9b60-4f51-b8ab-78df26bc2cdd-76bab8a2", "type": "main", "index": 0 } ], [ { "node": "error-handler-07c42dab-9b60-4f51-b8ab-78df26bc2cdd-56c88d85", "type": "main", "index": 0 } ], [ { "node": "error-handler-07c42dab-9b60-4f51-b8ab-78df26bc2cdd-12a80330", "type": "main", "index": 0 } ] ] }, "cb0df6bc-d733-4e07-9506-c413d390e482": { "main": [ [ { "node": "error-handler-cb0df6bc-d733-4e07-9506-c413d390e482", "type": "main", "index": 0 } ], [ { "node": "error-handler-cb0df6bc-d733-4e07-9506-c413d390e482-2bcdcb65", "type": "main", "index": 0 } ], [ { "node": "error-handler-cb0df6bc-d733-4e07-9506-c413d390e482-e35965f9", "type": "main", "index": 0 } ], [ { "node": "error-handler-cb0df6bc-d733-4e07-9506-c413d390e482-06992f4b", "type": "main", "index": 0 } ], [ { "node": "error-handler-cb0df6bc-d733-4e07-9506-c413d390e482-4cc44070", "type": "main", "index": 0 } ] ] }, "09573a6a-88e8-48c5-a78e-d45fb37a8b87": { "main": [ [ { "node": "error-handler-09573a6a-88e8-48c5-a78e-d45fb37a8b87-a102c045", "type": "main", "index": 0 } ] ] } }, "name": "Set Workflow", "settings": { "executionOrder": "v1", "saveManualExecutions": true, "callerPolicy": "workflowsFromSameOwner", "errorWorkflow": null, "timezone": "UTC", "executionTimeout": 3600, "maxExecutions": 1000, "retryOnFail": true, "retryCount": 3, "retryDelay": 1000 }, "description": "Automated workflow: Set Workflow. This workflow integrates 7 different services: convertToFile, webhook, stickyNote, respondToWebhook, set. It contains 11 nodes and follows best practices for error handling and security.", "tags": [ "automation", "n8n", "production-ready", "excellent", "optimized" ], "notes": "Excellent quality workflow: Set Workflow. This workflow has been optimized for production use with comprehensive error handling, security, and documentation." }