I will do custom shopify ai app backend with laravel multi tenant oauth live sync

Absolutely. My backend is API‑first – every feature (OAuth, billing, live sync, AI) exposes clean REST or GraphQL endpoints with full Postman documentation. You point your frontend at my API, and I handle all Shopify logic. No coupling – you keep your existing UI.

I enforce strict isolation using dedicated databases per merchant or row-level tenant filtering via global query scopes. Your architecture will guarantee that store data, access tokens, and logs remain completely secure, private, and inaccessible to other tenants.

Shopify’s Billing API is the #1 reason for App Store rejection. I implement all three charge types correctly: recurring application charges, usage charges, and one‑time charges. I also provide screenshots and test instructions for the Shopify review team. My backends have a 100% first‑time approval

I implement offline‑access OAuth with automatic token refresh. My Laravel backend stores the refresh token securely, runs a scheduled job to check expiry 24 hours before, and refreshes the access token without any user action. Your merchants never see a “reauthorize” screen

Caching + per‑store rate limits + fallback models (GPT‑3.5/Llama). Usage dashboard. Typical cost: 0.02-0.02–0.10 per 1K visits

Yes. Idempotent handler using Shopify's unique webhook ID – each webhook processes exactly once. Failed webhooks go to a dead‑letter queue with exponential backoff (5 retries). Real‑time sync under 5 seconds. Zero duplicates, zero lost orders.