Accounting API: QuickBooks, Xero, NetSuite, Sage | Apideck

Apideck gives Vertical SaaS and B2B Fintech companies one unified API to launch integrations in weeks.
Apideck connects SaaS products, fintechs and AI agents to the accounting systems their customers already use, through one API that reads and writes data in real time and never stores it.
Our easily embedded white-label interface gives users a simple and secure connection experience.
We build and maintain connectors, so you don't have to. View our full list of Accounting connectors. Missing a connector? We're able to add new connectors.
DATEV Unternehmen Online
Intuit Enterprise Suite
Microsoft Dynamics 365 Business Central
QuickBooks Enterprise
Sage Business Cloud Accounting
One unified schema for all your accounting data. Explore the available resources organized by use case.
Create and manage invoices, bills, and quotes
Process payments and manage bank accounts
Manage customer and supplier relationships
Chart of accounts and journal entries
Balance sheets, P&L, and aging reports
Company structure and settings
Items, services, and categorization
Additional API resources
Discover common integration patterns and use cases powered by our unified accounting data.
Sync vendor bills, approvals & payments across accounting systems in real time.
Push invoices, payment statuses & credits into users' ledgers.
Use accounting data to get smarter risk assessments and lending decisions.
Pull data to automate spend reporting and reconciliation.
Push bank transactions into accounting platforms for automated reconciliation and bookkeeping.
Match payments to invoices and bank transactions across accounting systems for automated, real-time reconciliation.
Pull real-time financial data for budgeting, forecasting, and financial analysis.
Streamline payroll data flow between HR systems and accounting platforms seamlessly.
Automate purchase orders, vendor management, and spend tracking across ERP and accounting systems.
Connect to accounting data to accurately calculate, file, and reconcile sales tax.
Embed sustainability metrics by syncing financial data for carbon footprint tracking and ESG reporting.
Automate collections workflows with real-time visibility into outstanding invoices, aged receivables, and payment status.
Connect AI agents to 200+ financial apps via MCP. AP automation, AR collections, bank reconciliation, and more.
An accounting API is a programmatic interface for reading and writing financial data such as invoices, bills, journal entries, ledger accounts, payments and reports from accounting platforms.
A unified accounting API goes further by mapping one canonical data model and a single authentication flow to many accounting systems at once, so you build one integration instead of one per platform.
Apideck’s Accounting API connects to 55+ accounting systems, including QuickBooks, Xero, NetSuite, Sage Intacct, Exact Online, Odoo, through one canonical data model and a single set of endpoints.
What changes when you connect once through a unified API instead of building and maintaining a separate integration for each accounting platform.
The shift toward open accounting means businesses increasingly expect their financial data to be accessible through APIs — making unified accounting integrations essential for SaaS products.
Many accounting platforms also set their own terms for API access, from free developer accounts to partner tiers and per-call fees. The Accounting API Pricing Guide lists what each platform charges app developers, with sources.
Accounting Integrations in hours – not weeks. Simplify integration development by using a normalized Accounting API with the most popular Accounting software.
Building APIs on a one-to-one basis can be a challenge. A lack of standardized APIs makes it difficult to scale your integration strategy. Maintaining them can even be a bigger challenge.