> ## Documentation Index
> Fetch the complete documentation index at: https://coollabstechnologiesbt.mintlify.site/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Change Detection

> Here you can find the documentation for hosting Change Detection with Coolify.

<Check>One-click setup.</Check>

![Change Detection](https://raw.githubusercontent.com/dgtlmoon/changedetection.io/master/docs/screenshot.png)

## What is Change Detection?

Detect website content changes and perform meaningful actions - trigger notifications via Discord, Email, Slack, Telegram, API calls and many more.

Live your data-life pro-actively.

## Example use cases

* Products and services have a change in pricing
* *Out of stock notification* and *Back In stock notification*
* Monitor and track PDF file changes, know when a PDF file has text changes.
* Governmental department updates (changes are often only on their websites)
* New software releases, security advisories when you're not on their mailing list.
* Festivals with changes
* Discogs restock alerts and monitoring
* Realestate listing changes
* Know when your favourite whiskey is on sale, or other special deals are announced before anyone else
* COVID related news from government websites
* University/organisation news from their website
* Detect and monitor changes in JSON API responses
* JSON API monitoring and alerting
* Changes in legal and other documents
* Trigger API calls via notifications when text appears on a website
* Glue together APIs using the JSON filter and JSON notifications
* Create RSS feeds based on changes in web content
* Monitor HTML source code for unexpected changes, strengthen your PCI compliance
* You have a very sensitive list of URLs to watch and you do *not* want to use the paid alternatives. (Remember, *you* are the product)
* Get notified when certain keywords appear in Twitter search results
* Proactively search for jobs, get notified when companies update their careers page, search job portals for keywords.
* Get alerts when new job positions are open on Bamboo HR and other job platforms
* Website defacement monitoring
* Pokémon Card Restock Tracker / Pokémon TCG Tracker
* RegTech - stay ahead of regulatory changes, regulatory compliance

## Key Features

* Lots of trigger filters, such as "Trigger on text", "Remove text by selector", "Ignore text", "Extract text", also using regular-expressions!
* Target elements with xPath(1.0) and CSS Selectors, Easily monitor complex JSON with JSONPath or jq
* Switch between fast non-JS and Chrome JS based "fetchers"
* Track changes in PDF files (Monitor text changed in the PDF, Also monitor PDF filesize and checksums)
* Easily specify how often a site should be checked
* Execute JS before extracting text (Good for logging in, see examples in the UI!)
* Override Request Headers, Specify `POST` or `GET` and other methods
* Use the "Visual Selector" to help target specific elements
* Configurable [proxy per watch](https://github.com/dgtlmoon/changedetection.io/wiki/Proxy-configuration)
* Send a screenshot with the notification when a change is detected in the web page.

## Links

* [The official website ›](https://changedetection.io)
* [GitHub ›](https://github.com/dgtlmoon/changedetection.io)