Fast to set up
Add your first URL and alert channel in minutes.
Plan-based uptime and SSL monitoring
Get alerts when
your site goes down.
Stop discovering outages from angry customers. Add your first URL in minutes and get alerts through the channels your team already uses.
No credit card required for Free Builders. Paid plans can be chosen during agent onboarding with card or x402.
Free plan included: monitor your URLs from the dashboard or your coding agent.
24/7 uptime monitoring for your websites, APIs and SSL.
Benefits
Hosted MCP on Free & paid
Paste one instruction into Claude Code, Codex, Cursor, Windsurf, OpenClaw, or Hermes Agent to onboard with Free Builders or a paid plan, add monitors and connect AlertsDown. Pay with a card checkout.
Real-Time Monitoring
24/7 automated checks for your websites, APIs and services.
Alerts
Every plan includes email alerts. Paid plans add SMS, Telegram, webhooks, and—on Saas Builders—WhatsApp downtime alerts.
SSL certificate monitoring
Get warned before your SSL certificates expire and break HTTPS.
How AlertsDown Works
Simple, powerful uptime monitoring in just three steps
Add a URL to monitor
Paste your site or API URL, pick the check interval, and start monitoring instantly.
Add alert contacts
Add email, SMS, webhook, or Telegram so the right people get notified.
Receive Instant Alerts
Get notified the moment something breaks so you can fix it before users notice.
Trusted by Growing Businesses
Used by teams behind Buy European, YouTube Power Up, and TestYourApp, with transparent plan-based limits and configurable data retention.
Real-time HTTP Monitoring
Track your website's uptime, response times, and performance with detailed analytics and instant notifications.
- ✓ 5-minute checks on Free; 1-minute checks on paid plans
- ✓ Response time tracking
- ✓ Instant downtime alerts
- ✓ Historical performance data
Why AlertsDown?
Uptime monitoring built for small teams, indie devs and SaaS.
Clear, simple pricing
No confusing plans or hidden limits.
Flexible alerts
Email, SMS and webhooks for your own tools.
Transparent retention
Raw HTTP check history is retained for 7, 30, or 90 days according to your plan.
Running everything solo? Read our guides on website monitoring for solopreneurs and uptime monitoring for indie hackers.
Here’s what people say about AlertsDown
Real stories from businesses using AlertsDown for their uptime monitoring needs
I created AlertsDown for my own projects, and it has been a lifesaver. I couldn't find a cheap and easy service, so I decided to build my own.
Nicolas Kaczmarski
Founder, Alertsdown.com & Youtube Power Up
The SSL certificate monitoring feature alerted us just in time before our certificate expired. Without AlertsDown, we would have faced significant downtime and lost customer trust.
Jérôme Kestener
Co-founder, Buy-European.org
Alertsdown.com is a tool that is simple to use, inexpensive, and hugely valuable. Not using it when you own a website would be nonsense.
Valentin
Founder, Testyourapp.io