Can an existing API Gateway be switched to streaming later?
Google says streaming mode is fixed when a gateway is created and cannot be modified later. During Public Preview, streaming gateways also have limits such as no Terraform enablement or custom domains through the documented load-balancer route.
Answered in
Google Cloud API Gateway Can Stream AI Responses, but the Timeout Is Your ProblemGoogle API Gateway adds SSE, WebSocket and gRPC streaming in preview; the gateway’s deadline and backend timeout still determine whether a stream survives.
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