"Authentication successful, but server still requires authentication" - Claude Code

[GGGSPB]

Bug report

Describe the bug

Added Supabase MCP to my project through "claude mcp add --scope project --transport http supabase "https://mcp.supabase.com/mcp?project_ref=xxxxxxxxxx"".

After launching claude code and navigating to /mcp it asked me to authenticate and opened the browser window. After I successfully authenticated supabase in the browser and it told me to return to claude code, claude code gives this error "Authentication successful, but server still requires authentication. You may need to manually restart Claude Code.".

After restarting claude and navigating to /mcp the supabase mcp is still listed with the warning label "authentication needed".

I've been trying to get supabase MCP to work for months, each time when I revisit there is some new authentication related error, I wish this would finally get resolved.

To Reproduce

Steps to reproduce the behavior, please provide code snippets or a repository:

1. In the project directory: claude mcp add --scope project --transport http supabase "https://mcp.supabase.com/mcp?project_ref=xxxxxxxxxx""
2. Launch claude
3. Navigate to /mcp and follow the authentication flow

[Rodriguespn]

Hi @GGGSPB, thank you for reporting this. I was able to successfully authenticate myself on Claude Code latest version 2.1.44. Can you please confirm that you're using the latest Claude Code version?