{"meta":{"instanceId":"workflow-313db0e7","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<img src=\"https://<your-n8n-instance>/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."}],"connections":{"Respond to Webhook":{"main":[[],[],[],[],[]]},"Request img":{"main":[[],[],[],[],[]]},"Create img bin":{"main":[[]]}},"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.","notes":"Excellent quality workflow: Set Workflow. This workflow has been optimized for production use with comprehensive error handling, security, and documentation."}