Context

The current specification (2025-11-25) states that:

The server MAY respond 405 if the method is not allowed as it states here

The problem

The implemented SDKs give no option to disable the trigger of the GET stream request for listening messages from the server. This appears contrary to the use of MAY in the above cited specification, i.e. "clients MAY issue this GET request".

Describe the solution you'd like

The requirements for a solution can be described by the following:

• the Client SHOULD be the owner of the decision for listening to server updates when using streamable-http transport.
• all sdks MUST implement a configuration listen_to_server_notification on client's streamable-http transport construction.
• listen_to_server_notification MUST have type bool
• listen_to_server_notification MUST default to TRUE

Alternatives

If the above is undesired it must be clarified in the specification that the client MUST attempt to start listening to messages from the Server.