Test your Google Books ↔ Supabase integration with real-time caching
Quick test with sample ISBNs:
GET /api/books/search?isbn=9780134494166POST /api/books/search
Content-Type: application/json
{
  "isbns": [
    "9780134494166",
    "9780134685991"
  ],
  "scanMethod": "batch_api"
}• First search hits Google Books API (~4-5 seconds)
• Subsequent searches use database cache (~900ms)
• All successful searches are automatically cached
• Credit system integration ready for production