Next.js Middleware

npm install @cred-protocol/nextjs @cred-protocol/sdk

// middleware.ts
import { credGates } from '@cred-protocol/nextjs'

export const middleware = credGates({
  apiKey: process.env.CRED_API_KEY!,
  policy: 'standard',
  matcher: ['/api/:path*'],
})

export const config = {
  matcher: ['/api/:path*'],
}

credGates({
  // Required
  apiKey: process.env.CRED_API_KEY!,

  // Policy (pick one)
  policy: 'standard',
  // gates: ['human', 'verified'],
  // operator: 'AND',

  // Route matching
  matcher: ['/api/:path*'],        // Only gate these routes

  // Dynamic pricing
  pricing: {
    enabled: true,
    curve: 'step',
    basePriceUsdc: 0.01,
  },

  // Failure handling
  on402: 'challenge',              // 'challenge' (402), 'deny' (403), 'pass'

  // Custom wallet extraction
  extractWallet: (req) => req.headers.get('x-agent-wallet'),
})

credGates({
  apiKey: process.env.CRED_API_KEY!,
  policy: 'standard',
  matcher: ['/api/:path*'],
  extractWallet: (req) => {
    return req.headers.get('x-agent-wallet')
      || req.nextUrl.searchParams.get('address')
  },
})

// app/api/resource/route.ts
import { NextRequest, NextResponse } from 'next/server'

export async function GET(req: NextRequest) {
  const trustScore = req.headers.get('x-cred-trust-score')
  const trustTier = req.headers.get('x-cred-trust-tier')

  return NextResponse.json({
    data: '...',
    trustScore,
    trustTier,
  })
}

credGates({
  apiKey: process.env.CRED_API_KEY!,
  policy: 'standard',
  matcher: [
    '/api/:path*',          // All API routes
    '/protected/:path*',    // Protected pages
  ],
})