---
title: "Slack website monitoring alerts — Lemwatch"
description: "How to send website down, SSL and performance alerts to Slack with Lemwatch: incoming webhook setup steps, what each alert contains, and the plan it needs."
canonical: "https://lemwatch.com/integrations/slack"
source: "https://lemwatch.com"
---

# Slack alerts for website monitoring

> Lemwatch posts uptime, SSL, performance and SEO alerts straight into any Slack channel using an incoming webhook. It is included on every plan, including the free one, with no message limit.

## Can Lemwatch send website down alerts in Slack?

 Lemwatch posts uptime, SSL, performance and SEO alerts straight into any Slack channel using an incoming webhook. It is included on every plan, including the free one, with no message limit.

## How to set it up

 What you need: An incoming webhook URL that starts with https://hooks.slack.com/services/.

- In Slack, open Apps, add Incoming Webhooks, and pick the channel alerts should land in.
- Copy the webhook URL Slack gives you.
- In Lemwatch, open the site (or your global notification settings) and paste the URL into the Slack field.
- Press Test to send a sample alert, then save.

## What the alert contains

 Down, recovery, SSL expiry, domain expiry, performance and content-change alerts arrive as a formatted message with the site name, what changed, the HTTP status or timing, and a link straight to the incident.

## What Lemwatch watches

 Every alert that reaches Slack comes from the same checks: uptime and response time, SSL and domain expiry, DNS changes, broken links, visual and content changes, Core Web Vitals and SEO regressions. You choose which of them are worth interrupting the channel for.

## Slack alerts — common questions

### Can I send alerts for different sites to different Slack channels?

 Yes. Each site can carry its own Slack webhook, so client work can go to a client channel while internal sites go to your own. Sites without a per-site webhook fall back to your global one.

### Do I get a message when the site comes back up?

 Yes. Recovery alerts are sent on the same channel as the original down alert, with how long the outage lasted, so the thread closes itself.

### Does Slack alerting cost extra?

 No. Slack delivery is unlimited on every plan including the free one, because a webhook message costs nothing to send.



## Lemwatch at a glance

- What it is: website monitoring that checks uptime, page changes, SEO, security, SSL and speed in one tool.
- Free plan: 10 sites, no time limit, all check types.
- Pro: $19/mo, 50 sites, public API and webhooks.
- Agency: $59/mo, 150 sites, white-label status pages.
- Source: https://lemwatch.com/pricing (facts verified from the product's own plan limits).



## Related

- [All alert integrations](https://lemwatch.com/integrations)
- [Slack setup guide](https://lemwatch.com/help/slack-integration)
- [Discord alerts](https://lemwatch.com/integrations/discord)
- [Telegram alerts](https://lemwatch.com/integrations/telegram)
- [Microsoft Teams alerts](https://lemwatch.com/integrations/microsoft-teams)
- [Monitoring REST API](https://lemwatch.com/api-docs)
- [Lemwatch pricing](https://lemwatch.com/pricing)
- [All monitoring checks](https://lemwatch.com/features)