---
title: "Custom webhooks website monitoring alerts — Lemwatch"
description: "How to send uptime monitoring alerts to any tool with a Lemwatch webhook: setup steps, the JSON payload, retries, and connecting Zapier, Make or n8n."
canonical: "https://lemwatch.com/integrations/webhooks"
source: "https://lemwatch.com"
---

# Custom webhooks alerts for website monitoring

> Lemwatch can POST a JSON payload to any URL you control when a site changes state, which is how you connect it to Zapier, Make, n8n, an internal service or a tool with no native integration.

## Can Lemwatch send uptime monitoring webhook for any tool?

 Lemwatch can POST a JSON payload to any URL you control when a site changes state, which is how you connect it to Zapier, Make, n8n, an internal service or a tool with no native integration.

## How to set it up

 What you need: Any HTTPS endpoint that accepts a POST request.

- Create the receiving URL — a Zapier or Make catch hook, an n8n webhook node, or your own endpoint.
- Add it as a webhook in Lemwatch and choose which events should fire it.
- Send a test delivery and check the payload arrives in the shape your tool expects.
- Save. Failed deliveries are retried rather than dropped silently.

## What the alert contains

 Each event sends a JSON body with the site, the event type, the timestamp, the HTTP status or measurement that triggered it, and the incident reference, so downstream automation has everything it needs without a second lookup.

## What Lemwatch watches

 Every alert that reaches Custom webhooks 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.

## Custom webhooks alerts — common questions

### Can I connect Lemwatch to Zapier, Make or n8n?

 Yes, through a webhook. Paste the catch-hook URL from Zapier, Make or n8n into Lemwatch and every alert becomes a trigger you can route anywhere those tools reach.

### What happens if my endpoint is down when an alert fires?

 Deliveries that fail are retried automatically, and the delivery history shows the response code for each attempt so you can see whether the problem was on your side.

### Is there also a REST API?

 Yes. Webhooks push events to you; the REST API lets you pull site, uptime, SSL and incident data on demand. API access needs a paid plan; webhooks and the MCP server for AI assistants work on the free plan.



## 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)
- [Custom webhooks setup guide](https://lemwatch.com/help/webhook-integration)
- [Slack alerts](https://lemwatch.com/integrations/slack)
- [Discord alerts](https://lemwatch.com/integrations/discord)
- [Telegram alerts](https://lemwatch.com/integrations/telegram)
- [Monitoring REST API](https://lemwatch.com/api-docs)
- [Lemwatch pricing](https://lemwatch.com/pricing)
- [All monitoring checks](https://lemwatch.com/features)