Alerts & Notifications

    How does the Alert Rules builder work?

    The Alert Rules builder lets you compose conditions (metric + operator + threshold + duration) and route matching alerts to specific channels.

    Updated 2026-07-10
    2 min read
    alerts
    rules
    automation

    Quick answer#

    Open Settings → Alerts → Rules, click New rule, pick a metric (uptime, response time, SSL, visual, SEO), set an operator + threshold + duration, then choose which channels the rule fires to. Rules evaluate on every check.

    What it does#

  1. Composable IF/THEN alert logic per site or across the fleet
  2. Combines multiple conditions with AND / OR
  3. Scopes rules to a site, tag, or organisation
  4. Overrides default notification routing per rule
  5. Supports quiet hours and dedupe windows

    6. Where to find it in Lemwatch#

    Settings → Alerts → Rules.

    How to build a rule#

  6. Click New rule and name it (e.g. "Slow checkout").
  7. Pick a metric (e.g. response time on /checkout).
  8. Set operator + threshold + duration ("> 3s for 5 min").
  9. Add scope (site, tag, or all sites).
  10. Choose channels (email, Slack, webhook) and hit Save.

    11. FAQ#

    Do rules replace the default alerts?#

    No — rules add to defaults. Mute defaults per site if you only want rule-based alerts.

    Is there a rule limit?#

    Pro: 25 rules. Agency: 100. LTD Tier 3: unlimited.

    Related#

  11. Alert rule conditions and operators
  12. Alert rule routing and suppression
  13. Notification preferences
    14. Was this article helpful?

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    Related Articles

    What conditions and operators can I use in Alert Rules?

    Rules support metric-based conditions (uptime, response time, SSL, status code, visual diff, SEO score) with numeric, boolean, and change operators.

    How do I route and suppress alerts from a rule?

    Every rule has a routing block: pick channels, set quiet hours, dedupe windows, and escalation paths so noisy rules never wake the wrong person.

    How do I set my notification preferences?

    Choose which alert types email you, mute categories entirely, and set quiet hours from Settings → Notifications.

    Mattermost Integration

    Connect LemWatch alerts to a Mattermost channel via incoming webhook.

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