Short answer
Ecommerce ERP integration is the automated exchange of data between an online store and an ERP system. Orders, customers, and refunds typically flow from the store to the ERP; stock levels, products, prices, and shipment tracking flow back. It can be built as custom software, on middleware, or with a prebuilt connector, and it is only as reliable as its handling of failures, duplicates, and data mapping.
- Store Orders
- Integration Map
- ERP Stock
Ecommerce ERP integration connects an online store with the ERP system that runs the business, so that data moves between them automatically. It replaces manual re-keying with software that exchanges orders, stock, products, and shipments reliably.
Typical workflows
| Workflow | Usual direction | Purpose |
|---|---|---|
| Order export | Store → ERP | Fulfill, invoice, and account for online sales |
| Inventory sync | ERP → Store | Show accurate stock and prevent overselling |
| Product and price sync | ERP or PIM → Store | Keep catalog data consistent |
| Fulfillment and tracking | ERP → Store | Mark orders shipped and notify customers |
| Refunds and cancellations | Store ↔ ERP | Keep finance and stock correct |
| Customer sync | Store → ERP (or both for B2B) | Accounts, credit terms, price groups |
How integrations are built
There are three main approaches:
- Custom integration — software written for your specific systems, typically a small service that receives events, queues them, and calls both APIs.
- Middleware / iPaaS — a general-purpose integration platform with connectors, mapping tools, and monitoring. See what middleware does.
- Prebuilt connector — a product designed for one platform–ERP pair, configured rather than programmed.
The direct vs. middleware and custom vs. off-the-shelf comparisons explain when each fits.
How data moves
Integrations detect changes in two ways:
- Events — the source system sends a webhook or event when something changes.
- Polling — the integration asks the source system for changes on a schedule.
Reliable integrations often use both. Data then passes through data mapping, which translates between the two systems’ structures and codes, and is written to the target using the target’s API.
What makes an integration reliable
The difference between a demo and a production integration is how it handles things going wrong:
- Idempotency so retries do not create duplicates.
- Retry strategies for temporary failures.
- Dead-letter queues for failures that need a human.
- Reconciliation to find and repair differences.
- Monitoring to notice problems quickly.
Summary
Ecommerce ERP integration automates the flow of orders, stock, products, and shipments between a store and an ERP. It can be custom, middleware-based, or a prebuilt connector, and its value depends on clear data ownership, accurate mapping, and robust failure handling.
Frequently asked questions
What data is usually synchronized?
Orders, inventory levels, products and variants, prices, customers, fulfillment and tracking, and refunds or credit notes. Which ones you need depends on your processes.
Is integration one-way or two-way?
Usually both, but per data type it should be one-way with a clear owner. For example, orders flow store-to-ERP and stock flows ERP-to-store. True two-way sync of the same field needs conflict rules.
How long does an integration take to build?
From a few weeks for a single, simple workflow to several months for a full multi-workflow integration. See the cost estimation guide for the factors involved.
Sources and further reading
Platform-specific statements on this page were checked against these sources on . Vendor APIs change; confirm details in the current documentation before you build.
- [1] Shopify webhook best practices — Shopify
- [2] Enterprise Integration Patterns — Gregor Hohpe and Bobby Woolf
Related reading
- Concepts What Is an ERP System? What an ERP (enterprise resource planning) system does, which business processes it manages, and why ecommerce businesses connect their online store to one.
- Concepts What Does Integration Middleware Do? What integration middleware is, what it does between ecommerce platforms and ERPs, the common types — iPaaS, ESB, message brokers — and the trade-offs involved.
- Concepts What Is Data Mapping in Integrations? What data mapping means in ecommerce-ERP integrations — field, value, and structural mapping — with examples, common pitfalls, and how to document and test mappings.
- Guides How to Integrate Shopify with a Custom ERP A step-by-step plan for connecting Shopify to an in-house ERP — scoping workflows, the Admin GraphQL API, webhooks, queues, data mapping, testing, and go-live.
- Platforms Shopify ERP Integration How Shopify connects to an ERP — the GraphQL Admin API, webhooks, inventory states, fulfillment orders, rate limits — plus the sync patterns and pitfalls that matter.