AsyncAPI is a prominent open-source specification designed to address the communication needs of asynchronous APIs and event-driven architectures, drawing from the foundational principles of OpenAPI standards. While OpenAPI has set the benchmark for REST APIs by standardizing documentation and communication, AsyncAPI builds upon this legacy to cater specifically to asynchronous scenarios, such as notifying applications of events without expecting immediate responses. It supports various protocols beyond HTTP, including MQTT, WebSockets, and AMQP, and utilizes a structure involving servers, channels, payloads, and bindings to describe API interactions. The specification, now in its 2.0 version, has led to the development of a robust ecosystem of tools, such as AsyncAPI Studio and AsyncAPI Generator, which aid in editing, validating, and documenting APIs. Asynchronous communication is likened to a restaurant scenario where a waiter (asynchronous API) informs the kitchen of an order without requiring a direct response, illustrating its utility in diverse applications. AsyncAPI has gained significant traction, supported by a dedicated community and sponsors, and is envisioned to become a standard for asynchronous communications just as OpenAPI has for RESTful services.