exit1.dev

exit1.dev watches your websites, APIs and servers and tells you the moment one goes down. Run HTTP/HTTPS, TCP, UDP, WebSocket and ICMP checks from the US and EU, and watch DNS, connect, TLS and TTFB timings stream in live. It tracks SSL certificate expiry, domain expiry and DNS changes too. Alerts go out by email, SMS, Slack, Discord, Teams and webhooks, with flap detection so one blip does not page you five times. You also get public status pages, embeddable status badges, a REST API and an MCP server for AI agents. Free plan: 50 monitors with 5-minute checks, no credit card. Paid plans from $4/month.