Polling APIs every 5 minutes is inefficient. The future of data integration is event-driven. If you are building a real-time data pipeline—for example, tracking new listings on a marketplace—you need a robust webhook architecture.
The Architecture
Let's look at how to build an event-driven pipeline for e-commerce arbitrage using n8n and Apify.
- The Trigger: We use the Vinted Smart Scraper hosted on Apify. We configure it to run on a schedule (e.g., every 5 minutes) to find new items.
- The Event: When the Apify run successfully completes, it fires a Webhook POST request containing the Dataset ID.
- The Receiver: An n8n Webhook node listens for this POST request.
- The Logic: n8n takes the Dataset ID, makes an HTTP GET request to the Apify API to fetch the raw JSON data, filters the arrays for items matching our profit margin criteria, and pushes an alert to a Discord channel.
Why This Architecture Scales
By decoupling the extraction logic (Apify) from the routing and transformation logic (n8n), you create a highly resilient system. If the extraction fails, n8n isn't blocked. If Discord's API goes down, the data is still safely stored in the Apify dataset.
This serverless, microservice-like approach allows indie hackers to build enterprise-grade data pipelines for fractions of a cent per execution.
Start building your event-driven pipeline today with the Vinted Smart Scraper.
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