Transparent Tracking Pixel for Email Open Detection — n8n ワークフロー

📌 Description This 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.

📂 Workflow Steps

Webhook Trigger (Request img) Path: /webhook/change-with-your-id Triggered by an HTTP request (e.g. when the image is loaded in an email). Accepts a query parameter id to identi