StepZen enables the creation of GraphQL APIs by combining data from various sources, such as REST APIs, databases, and other GraphQL endpoints, to deliver new services, like converting item prices into a user's local currency based on their IP address. Although GraphQL adoption is still behind RESTful APIs, StepZen provides tools like GraphQL Studio to help build, deploy, and manage these APIs. For users more familiar with REST, Kong's degraphql plugin can convert GraphQL APIs back into REST APIs, enhancing accessibility. The process involves deploying the API through StepZen, configuring Kong Gateway for authentication and request proxying, and using plugins to map and transform requests and responses, ensuring seamless integration and user experience. This approach allows for complex API composition and delivery without requiring additional code, leveraging StepZen's materializers and Kong Gateway's capabilities to meet consumer needs efficiently.