This add-on contributes a view in Oxygen that can be used as a testing tool for OpenAPI files (https://spec.openapis.org/oas/v3.1.0.html). The tool provides capabilities to easily inspect OpenAPI request-responses, and to make sure they work as expected. It is available for OpenAPI 3.x in both JSON and YAML format.

The tester loads the selected OpenAPI document and automatically fills the corresponding fields. After clicking the Send button, it presents the message received from the server in response to the request. The expected content type of the message is JSON. The response status and possible errors that may occur are presented below this area. The status has a green foreground for successful requests and a red foreground otherwise.