Synthetic Monitoring Website

Checkly

Checkly is a synthetic monitoring and application reliability website for API checks, Playwright browser checks, uptime monitoring, alerts, status pages, dashboards, tracing, and monitoring-as-code workflows.

Official site

checklyhq.com is the main public website for Checkly.

Core use

Developers use Checkly to run API checks, Playwright browser checks, uptime monitors, alerts, dashboards, and status pages.

Developer workflow

Checkly documentation describes monitoring as code through constructs, a CLI, APIs, SDKs, infrastructure-as-code integrations, and CI/CD workflows.

Checkly helps developers create API checks, browser checks, uptime monitors, alerts, status pages, and reliability workflows as code.View site icon on Checkly

Who is Checkly?

Checkly official site presents Checkly as an application reliability platform for developers and AI-native workflows. It combines synthetic monitoring, API checks, browser checks, alerts, status pages, dashboards, tracing, and monitoring-as-code tools.

Synthetic monitoring

Synthetic monitoring means testing a service from the outside on a schedule, instead of waiting for real users to report a problem. Checkly uses that idea for websites, APIs, and user flows. A check can ask whether an endpoint responds, whether a page loads, or whether a checkout-style browser journey still works.

API and Playwright checks

Checkly emphasizes API checks and Playwright-powered browser checks. API checks are useful for service endpoints and backend contracts, while browser checks can exercise real user journeys such as logging in, searching, adding an item to a cart, or completing a critical workflow. Both can catch regressions that simple uptime pings miss.

Monitoring as code

A major Checkly angle is defining monitors as code. Documentation describes constructs, a command-line interface, API access, SDKs, Terraform, Pulumi, and CI/CD workflows. This lets teams version checks with application code, review changes, and deploy monitoring alongside the systems being monitored.

Alerts, dashboards, and status pages

Detection is only useful if it leads to action. Checkly includes alerts and notifications, dashboards, maintenance windows, incident-management integrations, and status pages. These features connect test failures to the people and communication channels responsible for response.

Who uses Checkly

Checkly is used by developers, DevOps teams, SRE teams, platform engineers, QA engineers, and product teams that want production monitoring to look more like software development. It is especially relevant when teams already use JavaScript, TypeScript, Playwright, CI/CD, or infrastructure-as-code tools.

Limits and interpretation

Synthetic checks are powerful but incomplete. They cover the flows a team chooses to model, from the locations and intervals a team configures. A passing check does not prove that every user, browser, region, account state, or backend dependency is healthy. Good reliability work combines synthetic checks with logs, traces, metrics, real-user monitoring, and incident review.

Why it matters

Modern applications can break in ways that a simple homepage ping will never catch. Checkly matters because it lets teams turn important user journeys and API contracts into repeatable monitors, helping problems surface before they become support tickets or revenue-impacting incidents.

WHOIS domain data

Data pulled: May 23, 2026View current WHOIS record

Domain: checklyhq.com
IP address: 18.238.80.13
Registrar: NameCheap, Inc.
WHOIS server: whois.namecheap.com
Referral URL: http://www.namecheap.com
Created: February 19, 2017
Updated: January 20, 2026
Expires: February 19, 2027
Nameservers: kinsley.ns.cloudflare.com (108.162.194.75); rex.ns.cloudflare.com (172.64.35.13)
Domain status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Contact privacy: Registrant, admin, and technical contacts use Withheld for Privacy ehf in Reykjavik, Capital Region, IS.

Key concepts

Synthetic monitoringscheduled tests that simulate requests or user flows from outside the application.
Browser checka monitor that runs a browser automation script, often with Playwright.
Monitoring as codedefining checks, alerts, and reliability settings in version-controlled code.

Website features

API checks, browser checks, uptime monitoring, alerts, dashboards, and status pages.
CLI, constructs, REST API, SDKs, Terraform, Pulumi, and CI/CD integrations.
Tracing, AI root-cause analysis, maintenance windows, and incident-management integrations.

Common misconceptions

Synthetic monitoring does not replace real-user monitoring or backend observability.
A browser check is only as representative as the flow and test data chosen by the team.
Monitoring as code still needs ownership, review, alert tuning, and maintenance.

Open questions

Which user journeys and API contracts are important enough to monitor continuously?
How should checks be versioned, reviewed, and deployed with application changes?
Which failures should page an on-call responder versus create a lower-priority ticket?