PubNub provides developers with SDKs for popular programming languages and a REST API to facilitate communication and data management across applications. A newly released Postman collection helps developers explore PubNub's API features, including sending and receiving messages, managing user presence, and handling metadata through a scalable, real-time framework. To begin, developers can fork the Postman collection and configure the necessary environment variables, including publish and subscribe keys, to authenticate API usage. The tutorial guides users through creating a PubNub account, obtaining a keyset, and experimenting with APIs for message persistence and user presence. While the Postman collection provides a practical introduction to using PubNub's platform, comprehensive REST API documentation is available for more advanced features, such as Access Manager for securing applications and additional capabilities like message actions and channel groups.