claude.ai / Claude Desktop (OAuth)
Add a custom connector with the URL:workspace
argument, and without it the request goes to your default organization (set in the dashboard),
else your oldest membership. Naming an organization you do not belong to is refused, and get_me
lists the ones the connector can name.
Claude Code / CLIs (API key)
The same endpoint accepts your API keys directly, no OAuth dance:account:read for reads, account:write for changes.
Check that it works
get_me returning your identity proves the whole chain in one call.