Checkly

Checkly is a programmable monitoring platform that fits particularly well with agent-driven infrastructure because its checks are defined as code (TypeScript/JavaScript with Playwright for browser checks). Rather than configuring monitoring through a UI, teams define check logic, assertions, and alerting as code — making monitoring part of the codebase that agents can manage programmatically. The Playwright-based browser checks enable end-to-end reliability validation that catches issues simple HTTP checks miss.

The API and CLI enable programmatic management of checks, check groups, alert channels, and dashboards. Agents can create and update checks through code deployment rather than UI configuration, integrate monitoring into CI/CD pipelines (deploy and immediately verify), and read check results to feed reliability signals back into operational workflows. The CLI-as-code model is particularly aligned with agent-managed infrastructure.

Authentication uses API keys with team-level access. The Monitoring as Code model recommends managing credentials via environment variables in CI/CD contexts, which is appropriate for agent-driven deployments. Teams should use dedicated service accounts for programmatic Checkly management rather than individual developer credentials.

Reliability of monitoring infrastructure should meet high availability standards — a monitoring service that itself experiences downtime is less trustworthy. Checkly maintains multiple global check locations and infrastructure redundancy. The distributed check locations mean a network issue at one location doesn't cause false positives for all check results.

Documentation is excellent and reflects the developer-first, monitoring-as-code philosophy. The Monitoring as Code guides are particularly thorough, with clear patterns for structuring checks as code. Teams adopting Checkly will find the docs sufficient for both initial setup and advanced patterns like CI/CD integration and Playwright browser check development.