The text explains how to create a secure GPT assistant that interacts with APIs using Descope's OAuth and JWT validation features. It guides the reader through setting up a Descope project, configuring a FastAPI application to act as an authorization server, and implementing JWT validation for secure API access. The process involves creating an Inbound App in Descope to manage authentication, defining scopes for API access, and integrating these with a custom GPT to facilitate seamless and secure interactions without the complexity of a Model Context Protocol server. The custom GPT is configured to authenticate using OAuth, and the setup includes creating an OpenAPI specification for the API endpoints. The approach emphasizes maintaining security and authorization control on the server side, leveraging Descope's tools to manage the OAuth flow efficiently.