Hapi is a framework for services that allows developers to create web services, and it's being explored as an alternative to Express for building RESTful APIs. Hapi provides a more modular and service-oriented approach, which can be beneficial for creating scalable and maintainable applications. In this example, a simple API is built using Hapi and Couchbase Server, with two endpoints: one for returning a list of documents and another for creating new data in the database. The API uses Joi for data validation, ensuring that incoming requests meet specific criteria before processing them. The example demonstrates how to create a RESTful API with Hapi and Couchbase Server, providing a foundation for building more complex applications.