API Spec Designer is a comprehensive feature that allows you to meticulously design every aspect of an API contract. It provides a structured, step-by-step process to define an endpoint's behavior, parameters, and data payloads, ensuring that both frontend and backend teams are perfectly aligned. The designer is organized into four distinct sections.

General
General section sets the API's unique signature, including its URL path and the HTTP method that defines its action. You also configure required HTTP headers here, which are essential for aspects like authentication and content type.
Parameters
This section lets you define URL parameters, including dynamic Path variables and optional Query strings for filtering. The system then automatically generates a code model from your query params for developers.
This feature is perfect for generating hand-off materials for client delivery, providing clear specifications for quality assurance (QA) teams, or for use in internal architectural reviews.