ERP integration for online sellers

E-commerce ERP integration so orders, stock and refunds stop being re-keyed

One set of numbers across your store, your marketplaces and your ERP.

We connect WooCommerce, Shopify, Magento and marketplaces to custom and packaged ERPs, with retry-safe sync and a reconciliation report finance can trust. We also say plainly when a connector is the cheaper answer.

Start with a free pilot of 2 to 3 key modules.

Illustrative example

Who this is for

  • You sell on a store such as WooCommerce, Shopify or Magento, on marketplaces such as Amazon, eBay, Noon or Daraz, or on several at once.
  • Orders, stock or prices are re-keyed or uploaded in batches, and overselling, late shipments or reconciliation errors cost you money.
  • Your ERP or accounting system is custom, or one of SAP Business One, NetSuite, Odoo, Business Central, QuickBooks, Xero or Zoho.
  • More than one channel draws on the same stock, or finance needs fees, refunds and payouts posted correctly.

Not a fit

  • You run one small shop and the platform's own accounting plugin already covers your needs. Use the plugin; this service would be over-engineering.
  • You have no ERP or accounting system yet. Choose that first, then connect it. Our custom ERP page covers that path.
  • You only need a one-off data import. A script or a spreadsheet import is cheaper than a running integration.

This page is for hiring the integration. For the general service across accounting, CRM, HR and payments, see ERP integration services, and if you still need the ERP itself, our custom ERP software page covers it.

What gets synced

Nine flows, their direction and how failures are handled

Every row is a decision made once, in writing, so the two systems never argue about whose number is right.

E-commerce to ERP flows (orders, stock, prices, customers, shipments, returns, payments, tax, products) with direction, frequency, typical failure and how the integration handles it
FlowDirectionFrequencyTypical failureHow the integration handles it
OrdersChannel to ERPReal-time by webhook, with a scheduled catch-upMissed or duplicated ordersChannel order ID stored as a unique key, so a repeat delivery is recognised and, by design, does not create a second sales order; failed imports wait in a retry queue
Stock levelsERP to channelOn every movement for fast lines; scheduled for slow linesOverselling when two channels draw on one poolAvailable-to-sell is calculated once in the ERP and pushed to every channel, with an optional safety buffer on fast sellers
Prices and price listsERP to channelOn change, or scheduledA campaign discount overwrites the list price, or margin reports driftBase prices and campaign prices held separately, so a promotion ends cleanly and does not overwrite the list
CustomersChannel to ERPWith each orderDuplicate customer recordsMatching on email and address rules before a new record is created; guest checkouts mapped to a channel account
Shipments and trackingERP or warehouse to channelWhen the shipment is confirmedShoppers chase orders that already leftShipment confirmation writes tracking back to the order, and partial shipments update only their own lines
Returns and refundsBoth waysOn each eventA refund with no matching stock movement or credit noteOne written returns flow; refund, stock status and credit note linked by order reference; partial refunds handled per line
Payments, fees and payoutsPayment provider or marketplace to ERPPer settlement or payoutBank deposit does not match order totalsSettlement lines split into sales, fees, refunds and adjustments, then matched to the bank in a reconciliation report
TaxChannel to ERPWith each orderRounding differences between channel and ledgerTax treated as received from the channel with the rounding rule agreed up front; exceptions listed, not silently adjusted
Products and variantsERP to channel (content may stay in the channel)On change, scheduledA variant sold online that the ERP does not knowSKU mapping table with a check for unmapped items, including bundles that consume several ERP items

Every failure above ends in the same place: an exceptions list that someone owns. A reconciliation dashboard compares order counts, totals and stock on both sides each day, so a problem is a ticket, not a customer complaint. The reasoning behind each choice is in our guide to ERP and e-commerce integration.

Platforms and routes

Which integration route fits WooCommerce, Shopify, Magento or a marketplace?

Check the platform's current API documentation before committing; limits and versions change. This table shows the usual route.

WooCommerce, Shopify, Magento or Adobe Commerce and marketplaces compared by integration approach, when each route is best and what to watch for
ChannelUsual approachBest whenWhat to watch for
WooCommerceREST API and webhooksYou want live orders and stock on a store you host yourselfOrder status mapping, variations, and plugins that add fields or bundles; hosting speed affects webhook delay
ShopifyGraphQL Admin API and webhooksOrders and inventory by location need to reach the ERP in near real timeDelivery of webhooks is not guaranteed, so a scheduled comparison is part of the design
Magento / Adobe CommerceREST or GraphQL APIs, plus queues for large cataloguesLarge catalogues, multiple store views, or B2B price rulesCatalogue size and custom extensions; bulk updates are better batched than sent one by one
Marketplaces (Amazon, eBay, Noon, Daraz and similar)Marketplace seller APIs, report downloads or file feedsYou list the same stock on several marketplacesRate limits, listing rules, marketplace-held stock as its own location, and settlement files that mix sales, fees and refunds

The ERP side

Custom ERP

We design the integration interfaces into the ERP itself, so the channel flows are built in rather than bolted on.

SAP Business One, NetSuite, Business Central, Odoo

Reached through each product's documented APIs and import tools, alongside your ERP partner when a change is needed inside the product.

QuickBooks, Xero, Zoho

Usually posting summarised sales, fees and refunds rather than every line, because these tools are accounting-first.

If the store itself needs building or replatforming, see e-commerce development. Where the connection spans many systems, systems and API integration and API development describe the wider work. We name these platforms as systems we integrate with; this implies no partnership with any of them.

Honest decision guide

Connector, integration platform or custom integration?

Many sellers should buy a connector. This table shows where each route is stronger, so you can choose on fit.

An off-the-shelf connector, an integration platform and a custom integration compared on best fit, control, marketplace handling, monitoring, running cost and ownership
QuestionOff-the-shelf connectorIntegration platform (iPaaS)Custom integration
Best whenOne store, one mainstream ERP, standard processSeveral systems, and someone in-house can run the flowsShared stock across channels, a custom or older ERP, or finance rules that vary
Control of rulesLimited to the connector's settingsGood for standard steps; complex rules get hard to readFull: rules are written to your order of precedence
Marketplace and fee handlingDepends on the connectorDepends on the available building blocksBuilt to the settlement files you actually receive
Who watches itYou, with vendor supportYou, or the platform's partnerMonitoring and alerts built in, with support under a service level agreement
Running costSubscription that often grows with ordersSubscription plus the time to maintain flowsHosting, monitoring and change requests when a platform API changes
OwnershipVendor controls the roadmapFlows live on the vendor's platformSource code transfers to you on full payment

A custom integration is worth it when

  • Two or more channels sell from one stock pool and a single allocation rule must decide who gets the last unit.
  • Your ERP is custom, older or not supported by the connectors on the market.
  • Bundles, kits, made-to-order items or B2B price lists do not map cleanly.
  • Finance needs fee-level posting from marketplace settlements.
  • Monthly connector fees have grown with order volume and the sum now rivals a one-off build.

What it costs to run, whichever route you pick

  • Hosting for the integration service and its queue
  • Monitoring, alerting and someone who looks at the exceptions list
  • Updating the integration when a platform changes its API or versions
  • Support under a service level agreement, with response targets agreed per severity in the contract

Timeline Digital does not publish prices for custom software, because every project is custom.

Free pilot

How the free pilot works

See working software before you commit to the full project.

Timeline Digital starts every e-commerce integration with a free pilot. You contact us, we agree the 2 to 3 key modules that prove the integration, we build them as working software at no charge, and your team tests them. You decide on the final agreement only after testing, so you judge the work before you commit to anything.

  1. You contact us

    Tell us your channels, your ERP and where orders, stock or refunds go wrong today. A mutual NDA can be signed before you share sensitive details.

  2. We agree the 2 to 3 key modules

    Together we choose the flows that prove the integration, for example order import and stock sync first. Returns and payment reconciliation can follow.

  3. We build the pilot and you test it

    We build those flows as working software, free of charge, against a sandbox or sample data. Your team uses it and tells us what is wrong.

  4. You decide on the final agreement

    The full project starts only after you approve the pilot. Scope, milestones and terms are agreed in writing after it, not before.

How the work is delivered

Understand, Plan, Select Technology, Pilot, Build and Scale

The same five steps run every project. For an e-commerce integration each step has a specific job.

  1. Step 1

    Understand

    We map each channel, the ERP, who owns every record and the exceptions that cost you money: oversold lines, split shipments, refunds without returns.

  2. Step 2

    Plan

    Flows, directions, SKU mapping, the returns policy and the reconciliation report are written down, and the pilot flows are chosen with you.

  3. Step 3

    Select technology

    We choose the route from the platform table above: direct APIs, a queue between systems, marketplace feeds or an existing connector kept in place.

  4. Step 4

    Pilot

    Two or three flows run end to end on sandbox or sample data, so you see a real order land in the ERP and stock return to the channel.

  5. Step 5

    Build and scale

    After approval: remaining flows, tests with replayed real orders, a rehearsed cutover, monitoring switched on, then support.

Before cutover we test with copies of real products and replayed orders on sandbox data, and after launch we monitor failed messages and run the reconciliation report. We need API access to each platform, test environments, and a named person to sign off the mappings. Delivery is remote with video meetings in your working hours; our hours are Monday to Friday, 9:00 to 18:00 Pakistan time (PKT, UTC+5). Stores that also sell in branches may need retail management software or a custom POS in the same stock pool.

FAQ

E-commerce ERP integration questions buyers ask

Can WooCommerce integrate with my ERP?

Yes. WooCommerce exposes a REST API and webhooks, so orders can flow into the ERP while stock, prices and product data flow back. The design depends on your ERP, your plugins and your hosting. We assess these first and confirm the approach before building. For the design detail, read our ERP and e-commerce integration guide.

How do I stop overselling across Shopify and Amazon?

Keep one stock pool in the ERP and push available-to-sell quantities to every channel, not raw on-hand stock. Update fast-moving lines on every movement, hold a small safety buffer, and run a scheduled comparison to catch missed updates. Marketplace-fulfilled stock should be its own location, so the pool stays truthful.

Do I need middleware to connect my store to an ERP?

Not always. One store and one mainstream ERP can use a direct API link or a maintained connector. Add a queue or integration platform when several channels, retries and monitoring matter. The test is simple: if a failed message would be lost, you need something that stores and replays it. See integration patterns.

What happens to returns and refunds in the integration?

Each return is linked to its original order. The refund, the stock status (resaleable, damaged or written off) and the credit note are posted together and matched by order reference, so finance can tie them to the payout. Partial refunds, refunds without a return and marketplace-initiated refunds are decided in the planning step.

Should I buy a connector or build a custom integration?

Buy a maintained connector when you have one store, a mainstream ERP and standard processes. Build custom when channels share stock, the ERP is custom or older, bundles and B2B prices do not map, or finance needs settlement-level posting. Compare both on your own orders first; we will say honestly if a connector fits.

Can you connect Amazon, eBay, Noon or Daraz to my ERP?

Often, depending on what each marketplace offers sellers: documented APIs, report downloads or file feeds, within its rate limits and rules. We assess each one before promising a design. Tell us the marketplaces, order volumes and ERP, and we will say what is feasible. Check the platform's current API documentation too.

Can the CRM and the ERP both connect to my online store?

Yes. The usual rule is one owner per record: the store owns the checkout, the ERP owns stock and accounting, and the CRM owns sales conversations. Customers and orders then reach the CRM and the ERP from the same event. See ERP and CRM integration for the field-level view.

How does the free pilot work?

You contact us and we agree the 2 to 3 key flows to prove, for example order import and stock sync. We build them as working software, free of charge, and your team tests them on sandbox or sample data. You decide on the final agreement only after testing, so nothing is committed before then.

How long does an e-commerce ERP integration take?

There is no fixed timeframe: the schedule for your e-commerce integration is set from your requirements in the Plan step. A free pilot of 2 to 3 key modules comes first, you test it, and the full project starts only after you approve it. Long-term support under a service level agreement (SLA) follows launch.

How much does e-commerce ERP integration cost?

Timeline Digital does not publish prices for custom software, because every project is custom. The price follows the channels, flows, ERP, monitoring and support you need. It is agreed in writing after requirements analysis and the free pilot, and any change outside the approved scope is agreed with you before extra work begins.

Who owns the connector and mapping code?

You do. Connector, field-mapping and queue code transfer to you on full payment, with documentation, so you can host it where you choose and have another team maintain it. Credentials for your platforms stay in your own accounts. Third-party platform software and licences stay with their providers.

Guides for this decision

In-depth, practical reading for teams planning this kind of project.

Tell us your channels and your ERP, and see the sync working first

Send the platforms you sell on, your ERP and the flow that hurts most. We reply with the 2 to 3 modules we would pilot, or an honest note that a connector fits you better.

Start with a free pilot of 2 to 3 key modules.

Updated

About this page

Platforms are named as systems we integrate with; no partner status, certification or compliance is claimed, and each integration is confirmed against the platform's current documentation per project.

Author

Usama Asif

CEO and CTO, Timeline Digital.