Checkly

Checkly is a monitoring platform that checks if your websites and apps are working properly. It runs automated tests from different locations around the world to make sure everything functions as expected. Unlike traditional monitoring tools, Checkly lets you write your monitors as code using JavaScript or TypeScript.

The platform specializes in three types of monitoring: browser checks that simulate real user actions, API checks that test your endpoints, and heartbeat monitoring for scheduled jobs. You can use the same Playwright tests you write for development as production monitors.

Checkly provides instant alerts when something breaks, showing you exactly what went wrong with screenshots, logs, and traces. It includes built-in status pages to communicate issues to your users and team members automatically.

Getting started with Checkly is straightforward for developers:

• Sign up for a free account at checklyhq.com and create your first check through the web interface or using their command line tool.

• Write your first browser check using Playwright or create an API check by defining the endpoint you want to monitor.

• Choose how often you want the checks to run (from every 10 seconds to hourly) and select which global locations should run them.

• Set up alert channels like Slack, email, or SMS so your team gets notified when problems occur.

• For advanced workflows, install the Checkly CLI and define your monitors as code in your repository alongside your application code.

• Deploy your monitors using the CLI or integrate them into your deployment pipeline so new monitors are created automatically when you deploy new features.

• Playwright-based browser checks for user journey testing

• API and heartbeat monitoring with detailed assertions

• Monitoring as code using JavaScript/TypeScript

• Global monitoring from 20+ locations

• Instant alerts via Slack, email, SMS, PagerDuty

• Built-in status pages for incident communication

• Private location support for internal apps

• CLI for automated deployment

• Integration with CI/CD pipelines

• OpenTelemetry traces for debugging