Claude Code had been supporting SSE transport without requiring mcp-remote.
So I don't really understand what's new in this announcement.
Maybe what's actually new is streamable HTTP and OAuth?
https://github.com/anthropics/claude-code/blob/main/CHANGELO...
1.0.27
Streamable HTTP MCP servers are now supported
Remote MCP servers (SSE and HTTP) now support OAuth
MCP resources can now be @-mentioned
This now natively supports the latest streamable http transport protocol and the server is entirely remote, nothing is running on your local machine it's just an url (usually ending with /mcp, although not mandatory it's usually true and distinguishes from /sse servers).