For a site that publishes an RSS or Atom feed, Slack’s RSS app is the simplest way to send new feed items to a channel. If you need alerts about changes to a particular part of a page—or the site has no useful feed—use a page-monitoring service instead. The right setup depends on what the site publishes and how precisely you need to detect changes.
Choose the right alert method
| What you want to monitor | Recommended route | Key limitation |
|---|---|---|
| New posts or items from an RSS or Atom feed | Slack’s RSS app | It retrieves later-dated feed items; it does not watch arbitrary page edits. |
| A whole page, selected region, or non-feed page | A webpage monitoring service such as Visualping or Distill | Slack delivery and monitoring features may depend on the service’s plan. |
| An RSS feed with filtering or a self-hosted workflow | changedetection.io | Self-hosting adds setup and maintenance work; configure its notification destination. |
Slack’s RSS app is available on all Slack plans and, by default, to members other than guests. Slack’s exact polling cadence and a guaranteed alert delay are not established, so do not treat feed notifications as real-time monitoring. The availability and plan details below reflect vendor documentation and listings accessed October 3, 2026; confirm current terms when setting up.
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Set up Slack alerts from an RSS or Atom feed
1. Find the target site’s feed
Look for an RSS or Atom link on the site, often labeled “RSS,” “Feed,” or “Subscribe.” This route is suitable when the site publishes feed entries for the updates you care about. A feed may publish new articles but omit edits to existing pages; in that case, Slack’s RSS app will not provide the page-change alert you want.
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2. Add the RSS app to your workspace
- Add the RSS app from the Slack Marketplace to your workspace.
- Choose the channel where you want feed updates. A private channel can be useful when you want to group alerts separately.
- Paste the feed URL and subscribe.
Slack says updates appear the next time the site is updated. The app tracks the last item it retrieved and later polls for items with a newer datestamp. A page edit that does not produce a new, later-dated feed item may not appear as an alert.
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3. Manage or remove subscriptions
- Run
/feed listto inspect subscriptions. - Run
/feed remove [ID number]to unsubscribe from the subscription with that ID. - Run
/feed helpfor command help.
Monitor a page or selected area instead
Use a page-monitoring service when the target is an ordinary webpage, a specific region, or a change that is not published as a new feed item. These services check a page, compare it with an earlier version, and notify you when their configured conditions are met. Pick the service based on its detection method, check schedule, Slack support, and whether checks run locally or in the cloud.
Visualping: visual, text, or code changes
In Visualping, add the webpage, choose the whole page or a specific area, describe the changes that matter, and set a check schedule. Review detected changes in the dashboard or through notifications. Its documented use cases include competitor pages, regulations, prices or stock, vendor compliance, product releases or API changes, and unexpected changes to your own site.
Visualping’s notification overview lists Slack for its Business plan. Its Marketplace listing describes free and paid plans generally, but that does not establish Slack delivery as a free-plan feature.
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Distill: configure a Slack webhook action
Distill monitors can check pages and other content types—including PDFs, JSON, Word, XML, feeds, uptime, and sitemaps—compare versions, and optionally evaluate conditions. To send a monitor’s alert to Slack:
- Create an incoming Slack webhook for the destination channel and copy its URL.
- Open the monitor’s Options page in Distill.
- Select Add action > Slack Notification.
- Paste the webhook URL and save.
Treat the webhook URL as a secret: it is a credential that can post to the channel. Distill identifies Slack, Discord, and Teams webhook notifications as a premium feature for paid customers.
Distill offers local and cloud monitoring. A local monitor runs in the browser or app, so the device and app must remain open; a cloud monitor runs on Distill’s servers and can continue while your device is off. Choose based on whether you can keep the local setup running and whether you need checks to continue independently.
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changedetection.io: watch a feed or use a self-hosted workflow
For an RSS URL, changedetection.io documents adding the feed as a watch, choosing its basic/fast plaintext HTTP fetcher, and optionally filtering for item titles or keywords. Then configure a notification URL using its documented Slack format. Its tutorial also describes other notification destinations. The tutorial’s claim of 85+ supported notification methods was published in 2023 and is not a current independently verified count.
Choose settings that make alerts useful
- Feed coverage: Confirm that the feed includes the updates you need, not just newly published posts.
- Scope: Monitor a selected region when unrelated page changes would create noise; choose whole-page monitoring when any change matters.
- Detection type: Decide whether you need text, visual, or code changes and whether the service provides a readable diff.
- Schedule: Set a check interval that balances delay against how often checks run. Do not assume any service guarantees immediate notification.
- Execution location: A local monitor depends on an active device and app; a cloud monitor runs on the provider’s servers.
- Slack plan and service plan: Verify Slack delivery is included in the specific monitoring plan you intend to use.
- Maintenance: For self-hosted software, account for keeping the service running and maintaining its configuration.
Troubleshooting missed or noisy alerts
No RSS updates arrive
- Check that the URL is a feed URL, not merely the webpage address.
- Confirm that the site has published a new feed item with a later datestamp. Slack’s RSS app looks for later-dated items rather than arbitrary page changes.
- Use
/feed listto verify that the subscription exists and that you selected the intended channel.
A page edit is not detected
If the change did not create a new feed entry, switch to a page monitor. Check that the monitor includes the changed region and that its schedule has had time to run; alert timing depends on the configured schedule and service behavior.
Slack is missing from notification options
Check the monitoring service’s current plan requirements. Visualping lists Slack for Business, while Distill describes its Slack webhook action as a paid feature. Confirm the relevant plan before changing your setup.
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Too many irrelevant notifications
Narrow the monitored area, add an appropriate keyword or condition where supported, or select a detection mode that matches the change you care about. Recheck the page after adjusting the monitor so you know what it considers a change.
Local checks stop when you close the app
That is expected for Distill local monitors, which need the device and app to remain open. Use a cloud monitor if checks must continue while your device is off.
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