Welcome to the Checkly Developers Hub
The Checkly Developer Hub is your one-stop resource for the best content and docs available for E2E web app and API monitoring
Essentials to get you started
What’s a Browser Check?
Control a headless Chromium browser to mimic and test user behavior.Read more
What’s an API Check?
Monitor your APIs for performance, uptime and correctness.Read more
What are private locations?
Use the Checkly Agent to test your private APIs and applications.Read more
How should I configure my alerts?
Get quick, contextual alerts to know when your service fails—before your customers do.Read more
Recent blog posts
Is Your Ecommerce Site Ready for Black Friday and Cyber Monday?
Learn how monitoring with Checkly and Playwright can help keep your online store running under the heaviest holiday shopping workloads.
Five Playwright Tips to Level Up Your Testing Game
Using Client Certificates for mTLS and Zero Trust Networks
Checkly’s Culture Map: Overcoming Cultural Differences in a Remote Team
We donate 1% of our revenue to the Open Source
Advanced API and synthetic monitoring guides
Setup scripts for API monitoring
Setup scripts are a fundamental tool to tailor API checks to your own target endpoints. Their power and flexibility can intimidate beginners, who might struggle to understand how the different parts fit together. This guide will present and break down different real-world examples to help you master this game-changing tool.Read the guide
OpenAPI and Swagger help users design and document APIs in a way that is readable from both humans and machines. As a consequence, they can also be used to generate the code that will run the specified API - both on the provider and consumer side. Can we leverage this same principle to simplify API monitoring? After a brief first look at OpenAPI and Swagger, this article will show how we can quickly use them to monitor a new or existing API.Read the guide
The trend of declaring infrastructure as code has been picking up steam over the last few years, offering a way for DevOps teams to transparently manage and scale cloud infrastructure. Why should the way we manage monitoring be any different? In this article, we address this point and illustrate it with a practical example of Monitoring-as-Code on Checkly.Read the guide
Migrating from Puppeteer to Playwright
The switch from Puppeteer to Playwright is easy. But is it worth it? And how exactly does one migrate existing scripts from one tool to another? What are the required code-level changes, and what new features and approaches does the switch enable?Read the guide