Custom Shopify API Integration, Custom Apps & Headless Commerce
Connect Shopify to your ERP, custom warehouse systems, mobile apps, and headless React storefronts. Shopify API integration services by GreeLogix. We build custom private Shopify apps, Admin GraphQL API integrations, real-time inventory and order sync with ERPs, and high-performance headless commerce storefronts.
Common Business Challenges We Eliminate
Integrating Shopify correctly requires handling edge cases, network drops, and schema synchronization that off-the-shelf connectors miss.
Out-of-Sync Multi-Channel Inventory
Overselling products because inventory changes in physical warehouses or Amazon aren't reflected in Shopify stock levels in real time.
Legacy Storefront Performance Bottlenecks
Monolithic liquid themes bloated with dozens of unoptimized apps causing slow page load speeds and dropping checkout conversions.
Manual Order Export to ERP Systems
Operations teams exporting CSVs of orders every morning to manually enter into SAP, NetSuite, or proprietary inventory software.
High-Value Shopify Integration Use Cases
Tailored implementations engineered around your exact data flow and business logic.
Two-Way ERP & Inventory Synchronization
Real-time sync between Shopify inventory quantities, purchase orders, and enterprise warehouse fulfillment systems.
Headless Commerce Storefront API
Build lightning-fast custom storefronts using Next.js, React, or mobile apps powered by Shopify's high-speed Storefront GraphQL API.
Custom Shopify App Development
Private and public Shopify apps with custom admin extension pages, metaobjects, and specialized checkout discount rules.
Automated Order Processing Webhooks
Event-driven pipelines listening to `orders/create`, `fulfillments/create`, and `refunds/create` with automated fulfillment routing.
Shopify GraphQL & ERP Integration Pipeline
A structured, step-by-step breakdown of how data travels securely between your systems and Shopify.
Shopify Customer Purchase
Customer places order on custom headless storefront or standard Shopify checkout.
HMAC Signed Webhook Event
Shopify dispatches `orders/create` webhook with HMAC SHA-256 header validation.
GreeLogix Middleware & ERP Sync
Worker translates line items, deducts stock across warehouses, and triggers shipping fulfillment.
Fulfillment & Tracking Writeback
Tracking number written back to Shopify via Admin GraphQL API, notifying customer with delivery link.
API & Webhook Capabilities
Admin GraphQL API
Performant querying and mutations for products, collections, customers, and orders.
Storefront GraphQL API
Blazing-fast read-only queries for custom React, Next.js, and mobile commerce experiences.
Metafields & Metaobjects
Extend Shopify's core data model with structured relational attributes.
Shopify Webhooks
Reliable real-time events for cart updates, inventory levels, order creation, and returns.
Authentication & Security Protocols
Shopify Custom App Access Tokens
Direct token configuration with least-privilege scopes (`read_products`, `write_orders`) stored in secure vaults.
HMAC SHA-256 Webhook Verification
Verification of `X-Shopify-Hmac-Sha256` signature using your app secret to prevent spoofed order payloads.
GraphQL Cost Budgeting (Leaky Bucket)
Calculates query point costs to stay comfortably within Shopify's 1,000-point leaky bucket rate limit.
Custom Shopify Integration Examples
Real scenarios demonstrating how we solve complex data synchronization challenges.
Water Filtration Retailer Shopify Maintenance & API Sync
Automated inventory updates and subscription replacements for 10,000+ recurring e-commerce customers.
Headless Next.js Storefront with Storefront API
Reduced page load time by 60%, driving a 28% lift in mobile checkout conversion rates.
Supported Application & Backend Stacks
Our 5-Phase Delivery Lifecycle
Predictable, milestone-driven integration development with sandbox testing and zero downtime.
Store & Schema Audit
Review existing product metafields, variant architecture, and target ERP requirements.
Custom App & Credentials Setup
Create private Shopify Custom App with designated GraphQL access scopes.
Sync Middleware & Webhook Receiver
Develop high-throughput sync service with HMAC authentication and rate limiters.
Test Orders & Edge Case Simulation
Test discount codes, multi-currency checkouts, partial refunds, and stockouts in sandbox.
Production Deployment
Live cutover with real-time webhook health telemetry and inventory reconciliation.
Shopify Water Filter Retailer Architecture & Maintenance
How GreeLogix engineered custom Shopify API extensions, recurring order automations, and ERP sync for an e-commerce retailer.
Frequently Asked Questions About Shopify Integration
Common technical questions regarding authentication, rate limits, and custom logic.
Should we use Shopify REST API or GraphQL API?
Shopify has explicitly prioritized their GraphQL API over legacy REST. GraphQL allows fetching only the exact fields needed in a single call, provides higher rate limits via point costs, and grants access to newer features like Metaobjects. We build primarily on GraphQL.
How do you prevent inventory discrepancies between Shopify and our ERP?
We implement atomic delta-syncing. When an order is placed on any channel, our integration locks the stock record in a Redis cache, updates the ERP, and pushes the new available quantity to Shopify via the `inventorySetOnHandQuantities` mutation within seconds.
Can you build a Headless Shopify store using Next.js or React?
Yes. By separating the frontend from Shopify's liquid theme engine, we build ultrafast custom storefronts using Next.js that communicate with Shopify via the Storefront GraphQL API while leaving checkout to Shopify's secure PCI-compliant checkout engine.
How do you handle Shopify webhook delivery retries?
Shopify expects an immediate 200 OK within 5 seconds. Our webhook handler verifies the HMAC signature, queues the payload into Redis/BullMQ, and responds with 200 OK immediately, ensuring Shopify never marks your endpoint as failing.
Request Shopify Integration Architecture
Tell us about your application stack and the endpoints or workflows you need to connect with Shopify. We'll provide a technical proposal within 4 business hours.