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asyncapi · spec for event-driven

Gateway GusVSTimeout Titan
Gateway Gus saysAsyncAPI is the OpenAPI equivalent for event-driven and streaming APIs.

OpenAPI describes request/response APIs; AsyncAPI describes event-driven ones — message channels, topics, and payloads for Kafka, MQTT, WebSockets, and webhooks. It brings the same benefits (docs, codegen, validation) to async messaging, where there's no simple request/response to document. Use it when your system communicates through events rather than direct calls.

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Boss battleDecide OpenAPI vs AsyncAPI for: a REST CRUD API, and a Kafka event stream.

Example code

<!doctype html><html><head><meta charset="utf-8"></head>
<body style="background:#06040d;color:#e6e0ff;font-family:monospace;padding:20px"><pre>REST CRUD     → OpenAPI
Kafka events  → AsyncAPI (channels + message schemas)</pre></body></html>
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