To get website updates in Slack, first check whether the site publishes an RSS or Atom feed. If it does, Slack’s RSS app can post new feed items to a channel. If you need alerts when a specific page or part of a page changes, use a monitoring service such as Visualping, Distill, or changedetection.io instead.
Choose the right way to monitor the site
The key distinction is what you want an alert to mean. Slack’s RSS app reports newly dated feed items; it does not compare arbitrary webpage content. A page monitor checks a page or selected region and compares it with an earlier version.
| What you want to detect | Best starting point | Important condition |
|---|---|---|
| New articles or other items published in a feed | Slack’s RSS app | The feed must publish new items with later datestamps. |
| A price, product detail, policy, or selected page area changing | A webpage monitoring service | Choose a service that supports the kind of change and region you need to track. |
| Monitoring that continues while your computer is off | A cloud-based monitor | Local monitors depend on the device and app remaining active. |
Alert timing depends on the service’s checking schedule and notification delivery. Slack does not publish a universal polling cadence or guarantee that an alert will arrive immediately.
Find out whether the site has an RSS or Atom feed
If you only need to know when a site publishes a new post or feed item, start with its feed. Look for an RSS or Atom link on the website, check its help or subscription page, or try the feed URL provided by the site. A feed is useful only if it includes the updates you care about; a page changing without a new feed item will not necessarily generate an RSS alert.
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Set up Slack’s RSS app
- Add the RSS app to your Slack workspace from the Slack Marketplace.
- In Slack, paste the RSS or Atom feed URL, select the channel where updates should appear, and subscribe.
- Wait for the feed to publish a new item. Slack’s RSS app records the date of the last item it retrieved and later polls for items with a newer datestamp.
- Use
/feed listto review subscriptions,/feed remove [ID number]to remove one, or/feed helpfor command help.
Slack says the RSS app is available on all plans and, by default, to all members except guests. A private channel can be used to collect feed updates for a smaller group. See Slack’s instructions for adding RSS feeds for current details.
Monitor a page or selected area with Visualping
Use a webpage monitor when the target is not a feed item—for example, when you care about a particular product price, policy paragraph, or page section. Visualping lets you monitor a whole page or a selected area, describe relevant changes, set a checking schedule, and review changes in its dashboard or notifications. Its documented detection types include visual, text, and code changes. See the Visualping help center.
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- Add the target webpage in Visualping.
- Choose the whole page or select the area that matters.
- Set the change criteria or keyword conditions, if needed, to limit irrelevant notifications.
- Choose a checking schedule and configure notifications.
- Review detected changes in the dashboard or through the notifications available to your plan.
Plan access matters: Visualping’s notification overview lists Slack for its Business plan. Its Marketplace listing describes free and paid plans generally, but that does not establish that Slack notifications are included with the free plan. Confirm the current plan details before relying on Slack delivery. Relevant listings: notification overview and Slack Marketplace listing.
Send Distill monitor alerts to Slack with a webhook
Distill monitors a page on a schedule, reads its content, compares it with a previous version, and can run configured actions. Its monitor types include webpages, PDFs, JSON, Word documents, XML, feeds, uptime, and sitemaps. Distill supports sending a Slack notification through an incoming webhook.
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- Create an incoming webhook in Slack for the channel that should receive alerts, following Slack’s incoming webhook instructions.
- Copy the webhook URL. Treat it as a secret: anyone who obtains it may be able to post to that channel.
- In Distill, open the monitor’s Options page and choose Add action > Slack Notification.
- Paste the webhook URL and save the monitor settings.
Distill identifies Slack, Discord, and Teams webhook notifications as premium features for paid customers. Its monitoring options documentation also distinguishes local monitors, which require the browser or app and device to remain active, from cloud monitors, which run on Distill’s servers while your device is off.
Use changedetection.io for feed watches or self-hosted monitoring
changedetection.io can watch an RSS URL, filter for item titles or keywords, and send notifications to configured destinations, including Slack. Its tutorial describes choosing the basic or fast plaintext HTTP fetcher for an RSS watch, then configuring a notification URL. Follow the service’s tutorial for the current setup details. This is an option for readers who want a flexible monitoring workflow, including a self-hosted setup; self-hosting also means you are responsible for maintaining the service and its availability.
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Pick a monitor based on the alert you need
- Feed availability: Use Slack’s RSS app when the site publishes the updates you need as dated RSS or Atom items.
- Whole page or selected area: For a specific part of a page, choose a monitor that supports region selection so unrelated page changes are less likely to distract you.
- Change type: Check whether you need text, visual, or code changes, and whether the service presents a useful diff.
- Schedule and delay: Choose a check schedule that meets your needs. Do not assume any service provides instant alerts.
- Where checks run: A local monitor depends on your device and app staying active; a cloud monitor runs on the provider’s servers.
- Slack access and plan: Confirm whether Slack delivery is available on your chosen plan. Visualping lists Slack for Business, while Distill describes Slack webhook notifications as a paid feature.
- Maintenance: A self-hosted workflow can offer control but requires you to maintain the software and the system running it.
Or skip the browser setup
ScreenshotNeo is a website screenshot API and MCP server, not a replacement for a feed reader or a scheduled page-change monitor. It can capture a page on demand as an image or PDF; use it when the useful next step is capturing a clean snapshot, rather than waiting for an alert when a page changes. One GET request returns the capture. See the ScreenshotNeo API documentation.
curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://example.com -o shot.webpBefore capture, ScreenshotNeo can accept cookie and consent banners and remove 60+ known consent platforms, newsletter popups, and chat widgets; each step can be turned off. Bot checks or CAPTCHAs, blank pages, timeouts, failed loads, and cache hits are not billed, and the response identifies the page verdict and billing status in headers. Its MCP server offers take_screenshot, get_page_info, and capture_pdf tools for AI agents and MCP clients. The free plan includes 1,000 screenshots a month with no card; paid plans start at $5 for 3,000 shots. Visit ScreenshotNeo or sign up free for 1,000 screenshots a month, with no card.
Troubleshooting
No Slack message arrives from an RSS subscription
- Confirm that the feed URL is valid and that the RSS app subscription appears in
/feed list. - Check whether the feed has published a new item with a later datestamp. The RSS app looks for later-dated items; it does not alert just because an existing page changed.
- Make sure the subscription targets the intended channel and that the app has access to it.
A page change is missed or produces too many alerts
- Verify that the monitor is tracking the right page or selected region.
- Review its text, keyword, or other change conditions and adjust them to exclude irrelevant changes.
- Check the configured schedule and whether the monitor is local or cloud-based. A local monitor will not keep checking if its required device or app is inactive.
A Distill webhook does not post
- Confirm that the webhook URL was copied correctly and belongs to the intended Slack channel.
- Check that Slack Notification is configured as an action for the correct monitor and that the changes are saved.
- Verify that your Distill plan includes webhook notifications. If the URL may have been exposed, replace it in Slack and update the Distill action.
Frequently asked questions
Can Slack alert me when any webpage changes?
Slack’s RSS app is for feed items, not arbitrary page comparisons. For changes to page content that is not represented in a feed, use a monitoring service.
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Will the alert arrive in real time?
No universal real-time delivery guarantee or RSS polling interval is established here. The monitor’s checking schedule and the notification route affect when an update appears.
