There's probably still value (if you want to call it that) in it as a proxy, both to bypass IP address rate limits and to add necessarily credentials.

There's also another aspect Quite a few API providers provide automatic renewal for MCP server registrations, but not for personal access tokens. This may be less relevant when models just drive the user's browser.

> both to bypass IP address rate limits

Eventually this part will end. Most are in a "move fast and raise our stock value as much as possible" mode, so are fine with infinite auto-scaling to handle the surges MCP traffic is causing right now. But eventually, we'll probably see more per-auth rate limiting and/or heavily restricted MCP usage for non-frontier labs agents (especially if they only want e.g. Chat users, not coding harness users).