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.

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.

Postman is the world’s leading API collaboration platform, used by more than 35 million developers and 500,000 organizations, including 98% of the Fortune 500.