May 18th, 2026

Deprecation

Checkly Public API: swagger.json is deprecated

We are deprecating the legacy Swagger 2.0 specification at:

https://api.checklyhq.com/swagger.json

This file will remain available, but it will no longer receive updates. To generate API clients, inspect the latest API contract, or keep tooling in sync with the Checkly Public API, use the OpenAPI specification instead:

https://api.checklyhq.com/openapi.json

If your tooling currently points to swagger.json, update it to use openapi.json.

Why OpenAPI?

We are investing further into improving our OpenAPI specification to enable better API client generation, and discoverability by AI agents. Maintaining two flavors of our API spec was risking drifts: keeping a single source of truth will guarantee you (and your agents!) have the latest endpoint definitions in hand.

Happy monitoring!