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AsyncAPI is a powerful open specification for designing and documenting asynchronous APIs, particularly for event-driven architectures. It promotes interoperability and improves the developer experience by providing consistency and clarity in API documentation.
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AsyncAPI is a specification and tooling ecosystem for describing and documenting asynchronous, event-driven interfaces.
AsyncAPI emerged in 2017 from a community need to describe event-driven communication as clearly as synchronous APIs. The AsyncAPI Initiative now maintains the open standard under the Linux Foundation.
AsyncAPI is a blueprint for a message space: it describes channels, messages, payloads, and producer and consumer roles. Documentation, validation, and code artifacts can be generated while the transport remains replaceable.
A channel describes where and in which direction asynchronous communication occurs.
Messages define exchanged data and its structure.
A machine-readable contract makes service expectations testable.
AsyncAPI helps teams design, document, and validate event interfaces together. The standard clarifies the contract; semantics, delivery guarantees, and messaging operations remain additional concerns.
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