The API for Legal One Corporate Brazil lets you manipulate the data of the Legal One Corporate Brazil product. To have more information about the API, check the tutorials.
You can also access the Dev. Tools tab to see the available endpoints for the product API. Most of the parameters will be labelled as optional, this information should be ignored since it does not reflect if a field is really required or not. The documentation currently does not present information about the required fields, as no indication about the requirement is provided in the Swagger file, by default, the fields are labelled as optional.