How do I integrate Exact Online API with my application?

Apideck provides a unified Accounting API that makes Exact Online integration simple. Sign up for free, enable Exact Online in your dashboard, and use our Vault component to let your users connect their Exact Online accounts. We handle OAuth authentication, token refresh, and data normalization automatically.

What Exact Online data can I access through Apideck?

Our Exact Online integration supports 12+ data models including sales invoices, accounts customers, accounts suppliers, and purchase invoices. You can perform read and write operations through our unified API, working with the same code structure across all accounting platforms.

How does Exact Online authentication work with Apideck?

Apideck's Vault handles Exact Online authentication completely. Your users connect their Exact Online accounts through our secure, white-label UI. We manage OAuth tokens, automatic refresh, and credential storage, so you never have to implement Exact Online's auth flow yourself.

How do I keep my app in sync with Exact Online?

While Exact Online has limited native webhook support, Apideck provides polling-based sync and virtual webhooks to keep your data current. Configure your sync frequency in the dashboard, and we'll handle fetching updates from Exact Online.

Why use Apideck instead of Exact Online's direct API?

Using Apideck's unified API instead of Exact Online's direct API saves significant development time. You get normalized data models, automatic auth handling, and the same integration code works with 200+ other apps. When Exact Online updates their API, we handle the changes so your integration keeps working.

How quickly can I build a Exact Online integration?

Most developers ship a working Exact Online integration within a day using Apideck. Sign up for a free trial (no credit card required), enable Exact Online, and make your first API call within minutes. Our SDKs for Node.js, Python, and other languages make implementation straightforward.

Exact Online Accounting API integration

Build Exact Online Accounting and Payroll integrations in minutes, not months. One API to sync permissioned accounting data with Exact Online and 27+ other apps.

12+ data models

SOC 2 certified

Free trial

Requested Data Access

The application is requesting permission to access the following data.

Preview rotates every 4.5s

invoice_number

Read

amount

Read

due_date

Read

By authorizing you agree to grant the application access to the data listed above.

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Integration Guide

How to integrate Exact Online API in 3 steps

Build a production-ready Exact Online Accounting API integration in minutes, not months. No OAuth headaches, no maintenance burden.

Step 01

Create your Apideck account

Sign up for free and enable Exact Online in your Apideck dashboard. Configure which accounting data your app needs access to.

Start your free trial
2,500 API calls included
No credit card required

Step 02

Connect Exact Online via Vault

Use our pre-built Vault component to let your users securely connect their Exact Online account. We handle OAuth, token refresh, and credential storage.

White-label auth UI
Automatic token refresh
SOC 2 certified storage

Step 03

Start syncing accounting data

Make API calls to read and write accounting data from Exact Online. Use the same code to connect 200+ other apps.

Normalized data models
Real-time webhooks
Full CRUD support

Start Exact Online integration

Free trial • No credit card required • Setup in under 5 minutes

Code Example

Exact Online API integration code

Integrate Exact Online with just a few lines of code. Our unified Accounting API normalizes data across 200+ integrations, so you write once and connect everywhere.

Normalized responses — same data structure for all accounting apps
Official SDKs — Node.js, Python, and more with TypeScript support
Full documentation — interactive API reference with Exact Online-specific examples

View Exact Online API documentation →

import { Apideck } from '@apideck/node'

const apideck = new Apideck({
  apiKey: process.env.APIDECK_API_KEY,
  appId: process.env.APIDECK_APP_ID,
  consumerId: 'user-123'
})

// List invoices from Exact Online
const { data } = await apideck.accounting.invoicesAll({
  serviceId: 'exact-online'
})

console.log(`Found ${data.length} invoices`)

Explore all SDKs ↓

Why integrate Exact Online with Apideck?

Build a production-ready Exact Online integration with enterprise-grade reliability

Ship Exact Online integration fast

Go live with Exact Online in days, not months. Our unified Accounting API handles authentication, data normalization, and error handling so your team can focus on building features.

12+ Exact Online data models

Access 12+ data models for Exact Online including invoices, customers and bills. Read and write data through a single standardized API.

Real-time webhook coverage

Keep your product synchronized with Exact Online using webhooks. Receive push updates for invoices, customers, payments, and more without polling.

API Resources

Push and pull Exact Online data

Use our Unify API to get real-time data from Exact Online

View API Reference

Technical Specifications

Exact Online API integration details

Everything you need to know about integrating Exact Online through our unified Accounting API.

Authentication

OAuth 2.0

Secure token-based authentication

Data Models

12+ resources

Access 12+ normalized data models

Webhooks

Polling supported

Scheduled polling for updates

Security

SOC 2 Type II

Enterprise-grade security certified

Token Management

Automatic refresh

Never worry about expired tokens

API Format

REST + JSON

Standard REST API with JSON responses

Exact Online direct API vs Apideck unified API

Feature	Direct Exact Online API	Apideck Unified API
OAuth implementation	Build from scratch	Handled by Vault
Token refresh	Manual handling	Automatic
Data normalization	Exact Online format only	Normalized across 200+ apps
Error handling	Platform-specific	Unified error codes
Rate limit management	DIY implementation	Built-in throttling
Maintenance	Ongoing updates required	We handle API changes
Additional integrations	Separate work each	Same code, 200+ apps

View complete Exact Online API reference →

Use Cases

What integrations can you build with Exact Online?

Power these accounting workflows with Exact Online data through our unified API.

Accounts Payable

Sync vendor bills, approvals & payments across accounting systems in real time.

Learn more

Accounts Receivable

Push invoices, payment statuses & credits into users' ledgers.

Learn more

Business Lending

Use accounting data to get smarter risk assessments and lending decisions.

Learn more

Expense Management

Pull data to automate spend reporting and reconciliation.

Learn more

Payroll Accounting

Streamline payroll data flow between HR systems and accounting platforms seamlessly.

Learn more

Procurement

Automate purchase orders, vendor management, and spend tracking across ERP and accounting systems.

Learn more

Tax Automation

Connect to accounting data to accurately calculate, file, and reconcile sales tax.

Learn more

Carbon Accounting

Embed sustainability metrics by syncing financial data for carbon footprint tracking and ESG reporting.

Learn more

View all use cases

Exact Online Integration FAQ

Common questions about integrating Exact Online with your application

Learn more about Exact Online

Discover insights, developer guides, and best practices for working with Exact Online integrations.

The Complete Guide to the Exact Online API in 2026

This guide covers everything you need to know about the Exact Online API: authentication flows, rate limits, endpoint patterns, common pitfalls, and how to build production-ready integrations without the typical headaches.

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