The Ultimate Guide to BetterAuth's MCP Plugin with Next.js
If you've tried to secure your Next.js MCP server with OAuth, you've probably hit a wall. The official documentation and Vercel adapters can be misleading, especially when dealing with Streamable HTTP requests instead of SSE. After a full day of debugging, I found the missing pieces.
In this video, I provide the complete, end-to-end guide for correctly implementing OAuth for your MCP server using Next.js and the BetterAuth MCP Plugin. We'll cover the essential database schema, the critical `.well-known` API route the docs don't emphasize, and the exact CORS configuration you need to avoid connection errors.
This is the solution I wish I had. Stop wasting your tokens and let's get your AI agent properly secured.
✅ GET THE RESOURCES (URLs, Command + GitHub Repo):
https://www.grablink.xyz/l/TpD4lx
🕒 TIMESTAMPS:
0:00 - The Problem: Why MCP Auth is So Hard
1:02 - The Key: Using BetterAuth's MCP Plugin
2:03 - The Database Setup You ACTUALLY Need
3:33 - The #1 MISSING STEP: The .well-known API Route
5:48 - The Correct CORS Configuration for Your API
7:58 - The Difference Between SSE and Streamable HTTP
10:30 - LIVE DEBUGGING: Connecting with MCP Inspector
12:55 - Connecting a Real Client (Cursor)
14:40 - Final Code Walkthrough & Summary
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#MCP #OAuth #NextJS #BetterAuth #AIAgent #DeveloperTutorial #Vercel