Postman is a tool that enables seamless collaboration and experimentation in a graphical interface for API development, with features such as error detection, auto-suggestions, and variable definitions. The new Postman Nerdgraph API collection provides support for building with APIs, including auto-complete suggestions for queries, allowing users to compose flexible requests to the New Relic GraphQL API. To get started, visit the API collection homepage, provide an API key, create a Postman Environment, define variables, and select the plus symbol to create a new environment. The collection is organized into two top-level folders: mutations and queries, with sub-folders for various topics in the New Relic account. Users can try out this tool on their own free account and connect with the New Relic Developer Relations team for questions or support.