ComfyCloud MCP login broken when connecting to Claude Code
Users are hitting a login wall when trying to connect ComfyCloud's MCP integration with Claude Code. No fix is available yet, and the community is still diagnosing the cause.
ComfyUI is a popular tool for generating images and video with AI, and ComfyCloud lets you run those workflows on remote servers instead of your own machine. MCP (Model Context Protocol) is a standard that lets AI tools like Claude connect directly to outside services. The reported issue is that authentication fails during the login step when users try to link ComfyCloud via MCP inside Claude Code.
It's unclear whether the bug is on ComfyCloud's side, Claude Code's side, or both. No reliable workaround has been shared in the thread yet. If you were planning to use this integration to trigger ComfyUI image generation from within Claude Code, you'll likely need to run ComfyUI manually for now until a fix is released.
Key points
- Login fails at the authentication step when adding ComfyCloud MCP to Claude Code
- MCP is a standard protocol that lets AI tools talk directly to outside services
- The root cause is still being investigated — no official fix yet
- Affected users should fall back to running ComfyUI manually in the meantime
Quick term guide
- ComfyCloud
- A cloud service that runs ComfyUI image-generation workflows on remote servers so you don't need a powerful local machine.
- workflow
- A repeatable set of steps for getting a task done.
- MCP (Model Context Protocol)
- A standard that lets AI assistants like Claude connect to and control outside tools and services directly.
- context
- The information an AI uses to understand your request, such as files, notes, and past messages.
- AI tools
- Software that can help create text, code, images, or other work.
- authentication
- The login or identity check that proves who a user is.
- workaround
- An alternative way to get something done when the normal way doesn't work.
- trigger
- A signal or condition that starts a task.