I’m creating an MCP Server.
It works very well in my local. My MCP Client connects to it.
But when I push it into Vercel, when I want to connect to the MCP Server, I get 403 Forbidden error.
What could be the reason behind?
Do you see errors in your application logs on Vercel? Can you navigate to that MCP URL in your browser?
If you are using a preview deployment URL, it will be behind Vercel’s deployment protection and that could be causing the 403 error
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