# Checkly Public API: swagger.json is deprecated | Checkly Changelog

> Checkly changelog: Use the OpenAPI spec instead

Source: https://www.checklyhq.com/changelog/swagger-json-deprecated/

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# Checkly Public API: swagger.json is deprecated

Published May 18, 2026

## Use the OpenAPI spec instead

The old API spec at `api.checklyhq.com/swagger.json` is deprecated and frozen. Use the newer OpenAPI spec at `api.checklyhq.com/openapi.json` instead. The old file remains available for compatibility, but now carries a deprecation notice in its description and response headers.