Waterpoint requires no specific client. It does support MCP 2.1.
Connect to moo.waterpoint.org or waterpoint.moo.mud.org port 8301.
Waterpoint can be reached via TLS at moo.waterpoint.org port 8302.
Waterpoint can be reached via browsers that support WebSockets via DecafMUD.
Waterpoint has an SSH gateway. It requires connecting via the interactive (cleartext port 8301, TLS port 8302) at least once to configure your player's .authorized_keys property to contain an OpenSSH-formatted public key.
You may then ssh to Waterpoint using ssh -p 8322 firstname.lastname@example.org
Connections via the gateway can also use port forwarding to tunnel to localhost port 8301 in order to use it with conventional clients tha do not support either TLS or ssh.
The current contract is experimental but should not change in a backwards incompatible way.