Case Study: Building API SHIP - Shopify App for Courier Integration
How WS24 built and published API SHIP on the Shopify App Store: a no-code app that connects any courier API to Shopify. Connect local couriers with no Shopify app.
Thousands of Shopify merchants struggle to connect local and regional courier services that lack native Shopify apps. WS24 set out to solve this by building API SHIP an AI-powered app that generates working shipping integrations from API documentation alone, with zero coding required.
From Concept to Shopify App Store: Building an AI-Powered Courier Connector
The Challenge
Merchants Locked Out of Local Courier Integrations
Most courier companies — especially regional and local carriers — have REST APIs but no presence in the Shopify App Store. Building a custom integration requires dedicated developers, Shopify certification, and ongoing maintenance. Existing solutions like Zapier are expensive, slow to configure, and require merchants to understand JSON and API concepts.
The goal was clear: build a single Shopify app that lets any merchant connect any courier API — without writing code, without understanding REST, and without spending weeks on manual field mapping. The AI should read the carrier's documentation and generate the integration automatically.
Technical Architecture
Remix + Polaris + AI Orchestrator + BullMQ
The app was built on Remix with TypeScript strict mode, using Shopify Polaris for a native admin experience. PostgreSQL with Prisma ORM handles data, while Redis and BullMQ manage background execution queues. The AI Orchestrator — powered by Google Gemini — parses API documentation and generates connector templates with request chains, field mappings, and authentication configs.
AI-Powered Connector Generation
Two-Stage AI Pipeline: Extract, Then Generate
The AI engine uses a two-stage pipeline. Stage 1 fetches and parses API documentation via Jina AI Reader, extracting endpoints, auth methods, and data models into a structured spec. Stage 2 takes this spec and generates a complete connector template — including multi-step request chains, field interpolation, and error handling. The system supports URL, PDF, cURL command, and raw text inputs.
Execution Engine
The engine executes multi-step HTTP request chains with variable interpolation, conditional logic (Logic Hooks), retry policies, and automatic PII masking in logs. Each execution runs as a BullMQ job with rate limiting and priority queuing for Pro plan merchants.
Three trigger modes are supported: manual execution from the Shopify order page via an Admin Block widget, webhook-triggered on Shopify events like order creation, and cron-scheduled for periodic syncs like inventory updates.
Self-Healing Integrations
When a carrier API changes a field name or endpoint, the system detects execution errors and suggests fixes automatically — turning silent failures into actionable repair prompts without merchant intervention.
Shopify Admin Block Widget
Ship Orders Without Leaving the Admin
An Admin Block extension embeds directly into the Shopify order detail page. Merchants select a carrier, confirm parcel dimensions, and create shipments with one click. The widget displays tracking numbers, label download links, and shipment status in real time — no page navigation required.
Shopify App Store Publication
Publishing to the Shopify App Store required meeting strict technical and compliance standards: GraphQL Admin API exclusively, Polaris UI components, GDPR compliance webhooks, security headers (HSTS, CSP frame-ancestors, X-Content-Type-Options), and TLS 1.2+ encryption.
A dedicated Privacy Policy and Terms of Service were created specifically for the app, covering Shopify API data flows, third-party data sharing with courier APIs, AI processing disclosure, GDPR data subject rights, and data retention policies. The app passed automated compliance checks and was submitted for manual review.
Project Highlights
AI Connector Generation
Paste API docs, get a working integration in 60 seconds
Remix + TypeScript
Strict mode, zero TS errors, Polaris UI
Self-Healing Engine
Detects API changes, suggests automatic fixes
Admin Block Widget
Ship orders directly from Shopify admin
GDPR & Security
AES-256 encryption, PII masking, compliance webhooks
BullMQ Queues
Redis-backed execution with priority and rate limiting
Tech Stack
API SHIP demonstrates how AI can eliminate the complexity of API integration for e-commerce merchants. From architecture design through Shopify App Store publication — including GDPR compliance, security hardening, and carrier partnership outreach — WS24 delivered a production-ready SaaS product built to scale.