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Exact Online API Integration | MG Software

Connect your web app, storefront or portal to Exact Online: sync orders, invoices, stock and ledger data on a schedule or in near real time.

Exact Online API integration

What is Exact Online?

Exact Online is a widely used cloud ERP in the Netherlands and Belgium. It exposes REST APIs and webhooks so external systems can read and write within license and permission boundaries. A tailored integration keeps your custom software the primary UX while finance stays authoritative in Exact.

Why integrate?

Without integration, teams retype data between sales, operations and finance. That slows cash collection and increases error rates. Automation tightens reporting and frees people for client work.

Common use cases

  • Push e-commerce orders into Exact as sales entries or invoices
  • Write stock movements from a warehouse tool back to Exact
  • Sync customer balances and payment status with a client portal
  • Land internal timesheets on projects ready for billing

Technical approach

We implement OAuth or app tokens per Exact guidelines, model entities and directions of sync, then combine webhooks with scheduled reconciliation. Idempotency, rate-limit handling and dead-letter queues are part of the default blueprint.

Investment and timeline

A first production integration with a single bounded flow usually spans a few weeks depending on data volume and test access. We scope in workshops and ship in sprints.

Further reading

API connectionsSalesforce API Integration | Custom CRM ConnectivityWooCommerce API Integration | Store ConnectivityAPI Integration Examples - Practical Integrations for BusinessesPayment Integration Examples - Inspiration & Best Practices

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Frequently asked questions

Yes. Official APIs support sales, purchasing, inventory and projects among others, subject to your subscription and permissions.
We add retry policies, structured logging and operator alerts. Validations run before posting to avoid partial journal entries.
Yes when the API credentials allow it. We map administration IDs and enforce permission boundaries.

Need this integration?

We design reliable API integrations with monitoring and error handling.

Start a project

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Connect Salesforce to your portal, warehouse or backend: leads, opportunities, custom objects and events via REST and streaming APIs.

WooCommerce API Integration | Store Connectivity

Connect WooCommerce to ERP, inventory or fulfillment: orders, products and customers via REST and webhooks.

Shopify API Integration | Custom Connectors

Use Shopify Admin GraphQL and webhooks to sync orders, refunds and inventory with your internal stack.

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APIs enable software applications to communicate through standardized protocols and endpoints, powering everything from payment processing and CRM integrations to real-time data exchange between microservices.

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Jordan · 7 min read

MG Software
MG Software
MG Software.

MG Software builds custom software, websites and AI solutions that help businesses grow.

© 2026 MG Software B.V. All rights reserved.

NavigationServicesPortfolioAbout UsContactBlogCalculator
ServicesCustom developmentSoftware integrationsSoftware redevelopmentApp developmentSEO & discoverabilityAPI integrations
LocationsHaarlemAmsterdamThe HagueEindhovenBredaAmersfoortAll locations
IndustriesLegalEnergyHealthcareE-commerceLogisticsAll industries