Hand-write it, but do not hand-write it from scratch — Windsurf reads the same mcpServers shape Cursor does, so generate Cursor's and paste:
bash
sdods mcp install cursor -p demo-shop --print
--print writes nothing; it shows the target file and the snippet. Drop the JSON into .windsurf/mcp.json under the same mcpServers key and restart the editor.
The installer's list is only about which config file it knows how to merge without clobbering somebody else's servers. The server itself does not care which client is on the other end of the pipe — it is stdio either way.