Function createRequireAuthMiddleware

createRequireAuthMiddleware(): (
    req: Request,
    res: Response,
    next: NextFunction,
) => void
Create a middleware that requires a Bearer token in the Authorization header. Returns HTTP 401 if the token is missing or malformed.

This is a lightweight check that only verifies presence of a token. Full validation (is the token valid? does the user have access?) is handled by withPaywall() when a tool is actually called.

Returns (req: Request, res: Response, next: NextFunction) => void
Express middleware for token requirement
Example
```
const requireAuth = createRequireAuthMiddleware()

// Protect MCP endpoints
app.post('/mcp', requireAuth, mcpHandler)
app.get('/mcp', requireAuth, sseHandler)
```
- Defined in src/mcp/http/oauth-router.ts:318