Checkly

Checkly is an active reliability platform built for developers and engineering teams who need to test, monitor, and respond to incidents at the speed of modern software delivery. Founded to enable developers to monitor critical APIs and UIs easily, Checkly positions itself as a monitoring-as-code (MaC) platform that integrates directly into CI/CD workflows, AI coding assistants, and agentic development pipelines.

What It Is

Checkly unifies synthetic monitoring, uptime monitoring, testing, alerting, status pages, and AI-powered root cause analysis into a single developer-first platform. Rather than relying on legacy GUI-based monitoring tools, Checkly lets teams write, version, and deploy monitors as TypeScript/JavaScript code, Terraform, or Pulumi — treating monitoring infrastructure the same way they treat application code. The platform runs checks from 20+ global locations and is designed to work natively with AI agents and coding assistants like Cursor, Claude, Windsurf, OpenAI, and Mistral.

Code-First Monitoring Architecture

The core of Checkly's approach is its CLI and constructs library. Developers run npx checkly init to scaffold a project, write checks using strongly-typed TypeScript classes (ApiCheck, BrowserCheck, Dashboard, StatusPage), and deploy with npx checkly deploy. Key architectural elements include:

• Checkly CLI: TypeScript-native tool for testing and deploying the entire monitoring setup from a terminal or an AI agent
• Constructs library: Strongly-typed classes for every resource type, enabling full IDE support and version control
• REST API: Full programmatic access — everything the UI can do, the API can do
• Agent Skills: An open-standard skills package that gives Claude, Cursor, and Codex Checkly context on demand via npx checkly skills install
• MCP Server: Connects Checkly to AI tools via the Model Context Protocol

What the Platform Covers

Checkly organizes its capabilities into three pillars:

Detect — Uptime monitoring covers URLs, TCP ports, DNS, ICMP, and heartbeats from passive processes like cron jobs. Synthetic monitoring uses Playwright to simulate real user interactions across web applications and APIs, catching functional errors and performance regressions before they reach customers. An AI-powered test reporter catches issues before production.

Communicate — Contextual alerting routes notifications to Slack, PagerDuty, OpsGenie, MS Teams, Discord, Telegram, email, SMS, and phone. Status pages provide branded, automated communication about service health to customers and stakeholders.

Resolve — OpenTelemetry-based tracing follows requests through the entire stack. Rocky AI provides automated root cause analysis, surfacing detailed summaries and analysis of check run failures without requiring manual investigation.

AI-Native Workflow and Agentic Integration

Checkly's homepage describes the platform as "the active reliability layer for developers & agents," reflecting a deliberate positioning toward agentic software development. The platform claims prompt-to-deployed-monitor in under 30 seconds and advertises 10x faster monitor creation when using AI agents. Natural language prompts sent to connected AI agents generate fully configured tests and monitors — including code, region selection, and alert wiring — which are then deployed to Checkly automatically. The MCP server and Agent Skills package enable any compatible AI coding assistant to interact with Checkly's monitoring infrastructure directly.

Integrations and Ecosystem

Checkly integrates with a broad set of developer and DevOps tools:

• Alerting: Slack, PagerDuty, OpsGenie, MS Teams, Discord, Telegram, email, SMS, webhooks
• Incident management: FireHydrant, Rootly, Incident.io
• Observability: Datadog, Grafana, Honeycomb, Coralogix, Prometheus endpoint
• Infrastructure as code: Terraform provider, Pulumi provider
• AI assistants: Cursor, Claude, Windsurf, OpenAI, Mistral (via CLI and MCP server)
• Cloud marketplace: Available in AWS Marketplace

The platform is SOC 2 Type II certified and supports SAML/SSO for enterprise deployments. Private locations allow checks to run from within a customer's own infrastructure for monitoring internal services.

Adoption Signal and Recognition

Checkly's website lists customer logos including Vercel, Carhartt, CrowdStrike, Airbus, Fanatics, Mistral, ServiceNow, GoFundMe, Hopper, 1Password, Fastly, and Total Wine, among others. The company is backed by Accel, CRV, Mango Capital, and Balderton Capital, with angel investors including Guillermo Rauch (CEO of Vercel) and former executives from GitHub, Twilio, and Saucelabs. Checkly has also received Gartner Cool Vendor recognition for its monitoring-as-code approach.