Serve an agent over the network with StreamableHttpAcpAgentTransport (port 0 and getPort(), one agent per connection from an AcpAgentFactory or AcpAgentSupport.Builder#buildFactory()), and connect to it with StreamableHttpAcpClientTransport and WebSocketAcpClientTransport at /acp, two connections at once, over plain http:// with h2c. No API key required.

Full tutorial: https://lab.pollack.ai/docs/acp-java-sdk/tutorial/37-streamable-http-websocket

./mvnw compile -pl module-37-streamable-http-websocket -q
./mvnw exec:java -pl module-37-streamable-http-websocket

# The listener on its own, on port 8080:
./mvnw exec:java -pl module-37-streamable-http-websocket \
    -Dexec.mainClass=com.acptutorial.module37.HttpAgent -Dexec.args=8080