What does Lemwatch monitor?

Lemwatch runs 20+ automated checks per site: uptime, response time, SSL/TLS expiry, domain expiry, DNS changes, sitemap health, broken links, content changes, SEO audits, mobile usability, security headers, and more.

Yes. The free tier monitors up to 5 sites. Pro is $19/month for 50 sites and Agency is $59/month for 100 sites, both with full feature access.

How is Lemwatch different from UptimeRobot or Pingdom?

Lemwatch bundles uptime, change detection, SEO audits, security scans, and a public API in one platform — features competitors charge separately for. It also includes team workspaces, white-labelled status pages, and a webhook system out of the box.

Does Lemwatch send alerts?

Yes. Lemwatch supports email, browser push, webhooks, and per-site notification routing so the right person hears about the right incident.

Is there a public API?

Yes. Pro and Agency plans get a public REST API with webhooks for sites, checks, incidents, and reports.

HTTP 101 Switching Protocols

The server is switching to a different protocol as requested by the client.

What 101 means

HTTP 101 Switching Protocols indicates that the server understands and is willing to comply with the client's request to switch communication protocols. The most common use case is upgrading from HTTP to WebSocket.

Common causes

WebSocket connection upgrade
HTTP/2 upgrade from HTTP/1.1
TLS upgrade via Upgrade header

How to fix it

This is expected behaviour for WebSocket connections
If WebSocket connections are failing, check your proxy/load balancer configuration

SEO impact

No SEO impact. Protocol upgrades happen at the transport layer.

Monitoring tip

If your site uses WebSockets, LemWatch can monitor both the initial HTTP handshake and the WebSocket connection health.

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