You can put skype:username into the href attribute of a link and it works, but it begins a call, but I want to create a link to begin a chat (a text conversation). I know that skype: is a type of protocol, but don’t know how to create this link.
Have you tried <a href="skype:-skype-name-?chat">Start chat</a> ?
Allowed query parameters:
chat - start a chatcall - start a calladd - add person to the contactsuserinfo - view user's profilevoicemail - leave a voice messagesendfile - send a file