Using Postman’s UI, I can hit any internal or external API. We support multiple protocols like HTTP, GraphQL, and gRPC, which are popular in microservices.

About Postman Postman is the world's leading API platform, used by more than 20 million developers and 500,000 organizations worldwide for building and using APIs.

Postman’s API network already features an API hub with contributions from over 18,000 companies, which now, in turn, also allows its users to build AI agents that can interact with these APIs.

About Postman Postman is the world’s leading API platform, used by more than 17 million developers and 500,000 organizations worldwide for building and using APIs.