If you wish to use a tool such as Insomnia or Postman for example for testing API calls, you may donwload OpenAPI Specification files and then import them into your tool of preference.
To download them, there is usually a link underneath the title of the OpeAPI Specification page: For example for the BrainData WS page has this link underneath the page title: https://braincube.io/ws-doc/br...
In some cases, those links point nowhere. So for example on the performance-reports-ws page, the link titled "performanceReports_openapi.json" points to a blank page. You can still download the OpenAPI Specification file by concatenating the OpenAPI Specification webpage URL (https://braincube.io/api-doc/r... in this case) and the OpenAPI Specification file name found under the page title (performanceReports_openapi.json in this case) and you'll be able to get an URL that points towards the file you're looking for (https://braincube.io/api-doc/r... in this example).
