Block stream

A stream-only gateway serves blocks to your consumers. It is the path for an account that does not run validators. See Choose a path.

On the gateway host the feed is ws://127.0.0.1:9600 and gRPC 127.0.0.1:9601. Mint a consumer token under Gateways & keys → Stream consumers. The tab is hidden while Optimum has consumer tokens switched off. Signal then says reading the feed needs a consumer token, “which this account cannot mint yet”. Ask support.

Protocol, authentication, and client usage: Consumer block stream.

“Block stream” is the name of that gateway feature. It is not a separate Optimum product.