[SR-Users] externally triggered message sending to specific clients

Is it possible to send arbitrary text messages triggered by an external application (evapi/http) to registered SIP clients via websocket? The following doesn't seem to do anything. KSR.corex.send_data("sip:user@example.com", "Message at $Ts"); -- -- This message contains confidential information and is intended only for the individual named. If you are not the named addressee, you should not disseminate, distribute or copy this email. Please notify the sender immediately by email if you have received this email by mistake and delete this email from your system. Email transmission cannot be guaranteed to be secure or error-free, as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender, therefore, does not accept liability for any errors or omissions in the contents of this message which arise as a result of email transmission. If verification is required, please request a hard-copy version.