Does PubNub support the UDP protocol? Craig Conover November 04, 2020 22:56 Updated No. PubNub client libraries communicate over a TCP socket connection only. Related articles What transports are supported? Is there a limit to the number of channel groups in my PubNub key set? Does PubNub use a lot of battery power? How do I monitor latency from my location? Calculating message payload size before publishing