Why "endpoint.Host != c.baseURL.Host" is needed when starting up connection?

[sei-li-miidas]

I'm using
https://github.com/modelcontextprotocol/typescript-sdk
to create a MCP server.
When connctiont is received, it sends back "endpoint" event with data "message?sessionid=xxxx", but not endpoint in the data.

So this library doesn't work with typescript-sdk from modelcontextprotocol, or there is some kind of configuration about it?
Anyone can help, thanks in advance

[sei-li-miidas]

I checked source of typescript-sdk again, and found that
https://github.com/modelcontextprotocol/typescript-sdk/blob/main/src/client/sse.ts#L68
includes original url when create endpoint, but not just data.

[sei-li-miidas]

create an issue here