Shopify Integration Services
Shopify's API is well documented and well built. The difficulty is almost always inventory: multi-location stock, two channels selling the same unit, and a sync that has to be right to the second or you oversell.
Discuss your projectWhat we integrate
Orders out of Shopify
Into your ERP, fulfilment system or own application, with the tax, discount and shipping lines preserved rather than flattened into a total nobody can reconcile.
Inventory in
Stock levels from your warehouse system into Shopify, per location. The integration most likely to cause visible problems and therefore the one to design most carefully.
Products and variants
Catalogue managed in your own system and pushed to Shopify, including images, options and metafields for the attributes Shopify has no field for.
Fulfilment and tracking
Shipments created against orders with tracking numbers written back, so the customer-facing status in Shopify matches reality.
Customers and accounts
Synced to your CRM with marketing consent carried across, which matters legally rather than merely operationally.
Returns and refunds
Handled in both directions, including the stock implications of a return — the step most often omitted, and the reason stock figures drift.
Inventory, and why it is the hard part
Shopify tracks stock per location, and so should your warehouse system. The mistake is syncing a single total: a customer in one region then sees stock that exists three hundred miles away and cannot be shipped to them in time, or a location-aware fulfilment rule picks a site that has nothing.
The second problem is timing. If you sell on Shopify and on another channel, both can sell the last unit within the same second. No sync interval prevents that, because the two sales genuinely happened before either system knew about the other. The mitigations are real but partial: sync as close to real time as the API allows, hold a buffer on low-stock lines so the last unit or two is not sold on every channel at once, and have a defined process for the oversell that will occasionally happen anyway. We would rather set that expectation than imply a sync can make it impossible.
For large catalogues, the bulk operation endpoints matter. Updating thousands of variants one request at a time will exhaust your rate allowance; Shopify's GraphQL API charges by query cost rather than by request count, so a well-shaped bulk query does far more work within the same allowance.
How we build it
- The GraphQL Admin API for new work, since Shopify's development is focused there and some newer capabilities are available nowhere else.
- Webhooks with HMAC signature verification, so an endpoint cannot be driven by anyone who learns its URL.
- Idempotent webhook handling, because Shopify retries and order-created will arrive more than once.
- An explicit API version pinned in every call, with a scheduled review before that version's support window closes — Shopify releases quarterly and retires versions on a published timetable, so an unpinned integration will change behaviour without warning.
- Bulk operations for catalogue and inventory work rather than per-record loops.
- A reconciliation job comparing stock and order counts on both sides and reporting drift, since this is the integration where silent drift is most expensive.
Common questions
Tell us what you need
Describe the problem and we will come back with scope, timeline, and a rate. No obligation to proceed.
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