Which free tool can make REST calls to Cisco DNA Center?

Postman is a widely used, free, and popular API platform for building and using APIs, including making REST calls to platforms like Cisco DNA Center. It provides a user-friendly interface to send requests, view responses, and manage API collections. While Cisco DNA Center does have built-in API documentation and potentially some interactive tools, Postman is a general-purpose, external tool specifically designed for this function. API Explorer and REST Explorer are generic terms that could refer to features within various platforms or dedicated tools, but Postman is a specific, well-known application. Mozilla is a web browser and not an API client.