```yaml
product: AlterLab
title: "Event-Driven Scraping — Web Scraping Glossary | AlterLab"
comparison_context: "AlterLab is an alternative to Firecrawl, ScrapingBee, and Bright Data."
source_url: https://alterlab.io/glossary/event-driven-scraping
```

general

# Event-Driven Scraping

Event-driven scraping triggers scrape jobs in response to external events — webhooks, schedule triggers, or message queue messages — rather than running on a fixed polling interval.

Traditional scraping runs on a fixed schedule: scrape a list of URLs every hour. Event-driven scraping instead triggers jobs in response to meaningful events: a price change webhook from an e-commerce platform, a new listing notification from a marketplace API, a social mention detection, or a message published to a queue by another system.

Event-driven architectures reduce unnecessary scraping by only fetching content when there is evidence it has changed, improving efficiency and reducing target server load. They also enable near-real-time data pipelines: an event triggers a scrape job within seconds, the result is processed and written to the destination, and a downstream consumer is notified — all without a polling loop.

Implementing event-driven scraping requires: an event source (webhook endpoint, Kafka consumer, AWS SQS subscriber), a job dispatcher that converts events to scrape tasks, a scraping backend (HTTP or browser tier), and a delivery mechanism for results (database write, webhook to another system, or message publish).

### What is Event-Driven Scraping?

Event-driven scraping triggers scrape jobs in response to external events — webhooks, schedule triggers, or message queue messages — rather than running on a fixed polling interval.

### How does AlterLab handle Event-Driven Scraping?

Implementing event-driven scraping requires: an event source (webhook endpoint, Kafka consumer, AWS SQS subscriber), a job dispatcher that converts events to scrape tasks, a scraping backend (HTTP or browser tier), and a delivery mechanism for results (database write, webhook to another system, or message publish).

## Related Terms

[WebhookAn HTTP callback that delivers data to a specified URL when an async scrape job completes.](https://alterlab.io/glossary/webhook)[Job QueueA job queue is a buffer that decouples producers (tasks submitted by clients) from consumers (workers that execute the tasks), enabling asynchronous, scalable processing.](https://alterlab.io/glossary/queue)[Data PipelineA data pipeline is an automated sequence of steps that ingests raw data from a source, transforms it, and delivers it to a destination such as a database, data warehouse, or analytics system.](https://alterlab.io/glossary/data-pipeline)[Scraping APIA managed web scraping service that abstracts proxy rotation, JavaScript rendering, and automatic website compatibility into a single HTTP endpoint.](https://alterlab.io/glossary/scraping-api)[REST APIA web service that exposes data and actions through standard HTTP methods and resource-oriented URLs, returning structured JSON responses.](https://alterlab.io/glossary/rest-api)

## Extract Event-Driven Scraping data from any website

AlterLab returns clean, structured data from any public URL — no scraper infrastructure needed. Start free, no credit card required.

[View API docs](https://alterlab.io/docs/api/rest)

[Back to Glossary](https://alterlab.io/glossary)