Async API Specification 2.0
summary
AsyncAPI 2.0 defines a machine-readable contract for event-driven systems so teams stop guessing who consumes what; it adds channels unified (one model for Kafka topics, WebSockets, HTTP streams), protocol bindings to hold Kafka/RabbitMQ/MQ specifics like message key, and schema support for JSON Schema, OpenAPI schemas and Avro. It addresses the real problem of sprawl (teams creating ~10 topic versions per message) and already sees production use (Slack, New Relic, Salesforce/MuleSoft), with docs, playground, validation and code generation working in practice.
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