Welcome to Code-First Synthetic Monitoring

A Monitoring as Code (MaC) workflow that seamlessly integrates into your existing stack and makes monitoring powerful, efficient and version-controlled.

new BrowserCheck('homepage-browser-check-1', {
  name: 'Browser Check #1',
  frequency: 10,
  regions: ['us-east-1', 'eu-west-1'],
  code: {
    entrypoint: './home.spec.js'

new ApiCheck('product-api-check-1', {
  name: 'Product API - fetch products',
  degradedResponseTime: 10000,
  maxResponseTime: 20000,
  requests: {
    url: "https://api.acme.com/v1/products",
    method: "GET",
    assertions: [AssertionBuilder.statusCode().equals(200)]

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Monitoring as Code with Checkly CLI enables you to code, test, and deploy your testing and synthetic monitoring setup like never before.

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Your entire monitoring workflow, defined as code in your existing code base.

Seamlessly integrate API monitoring into your E2E testing and monitoring regimen.

Fully harness the power of Playwright to validate the reliability of your web app with Checkly’s browser checks.

Store all monitoring resources in your Git repo, alongside your application code: just like the unit testing patterns you are familiar with.

Code, compose, and structure your resources using TypeScript. No YAML-engineering needed.

Use any CI platform to collaborate with your team to code, test, and deploy E2E browser and API checks.

Start monitoring your API endpoints and vital site transactions.

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