Kafka ApiVersions Request Wire Format v4 — Binary Protocol Layout

What is ApiVersions?

Sent by every client on every new connection to discover what API versions the broker supports. UNSUPPORTED_VERSION errors in client logs appear when a client is newer than the broker; this API prevents that by letting the client downgrade gracefully.

Schema
{
  "ClientSoftwareName": string,
  "ClientSoftwareVersion": string
}

Example
{
  "ClientSoftwareName": "orders",
  "ClientSoftwareVersion": "3.7.0"
}