What is a unified accounting API, and how is it different from a direct integration?

A unified accounting API provides one canonical data model and a single authentication flow that map to many underlying accounting platforms. Instead of building and maintaining a separate integration for each platform, you build once and reach every connected system. Apideck normalizes fields, pagination and auth across platforms so the data looks the same no matter which accounting system it comes from.

Which accounting systems does Apideck support?

Apideck’s Accounting API connects to more than 50 accounting systems, including QuickBooks, Xero, NetSuite, Sage Intacct, Exact Online, Odoo, Microsoft Dynamics 365 Business Central, FreshBooks, Zoho Books, MYOB and Workday. The full, current list of connectors is shown on this page.

What financial data can you sync with the Accounting API?

You can sync invoices, bills, credit notes, purchase orders, expenses, payments, bank feeds, bank accounts, customers, suppliers, ledger accounts, tax rates, journal entries and financial reports such as the balance sheet and profit and loss statement, all through one canonical schema.

Does the Accounting API support both reading and writing data?

Yes. The Accounting API supports both reading and writing financial data, so you can pull records such as invoices and reports and also create or update records like invoices, bills, payments and journal entries in the connected accounting system.

How does authentication work across different accounting systems?

Apideck handles OAuth, token handling and connection management for every accounting platform on your behalf. Your users connect their accounting system once through a single flow, and Apideck manages the credentials and connection state across all of them.

Does Apideck support real-time updates and webhooks for accounting data?

Yes. Apideck provides both native and virtualized webhooks, so your application can receive real-time updates when accounting data changes, even for platforms that do not offer native webhooks.

How long does it take to build accounting integrations with Apideck?

Because you integrate once against a single unified API rather than building a separate integration per platform, teams typically launch accounting integrations in weeks rather than the months required to build and maintain each connector directly.

Is the Accounting API suitable for AI agents and fintech use cases?

Yes. Apideck offers an MCP server and SDKs that let AI agents securely read and write financial data across more than 50 accounting systems, which supports fintech use cases such as accounts payable, accounts receivable, business lending, expense management, bank feeds and FP&A.

Apideck and Plaid, coming soon: one integration gets your customers’ accounts into Plaid-powered apps and their ledgers. Request early access →

Accounting API One single API to build Accounting integrations

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Dropbox
File Storage API
Disabled
Pipedrive
CRM API
QuickBooks
Accounting API
Teamleader
CRM API
Twilio
SMS API

OAuth, token handling & connection management.
All done for you.

Our easily embedded white-label interface gives users a simple and secure connection experience.

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Accounting API connectors ⚡️

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.

Access Financials

	Apideck unified Accounting API	Building direct integrations
Integration setup	One integration covers every connected accounting system.	A separate build for each platform, each with its own API.
Data model	One canonical schema normalizes fields across all systems.	Different data models, taxonomy and pagination per platform.
Authentication	A single OAuth, token handling and connection flow, done for you.	A separate auth strategy and token handling per platform.
Maintenance	Apideck absorbs upstream API changes and version updates.	Your team tracks and fixes breaking changes on every platform.
Adding coverage	Add new accounting systems without writing new code.	Engineering effort grows with each platform you add.
Time to launch	Launch accounting integrations in weeks.	Months of engineering per platform.

Accounting API One single API to build Accounting integrations

Trusted by fast-moving product & engineering teams

Manage your integrations

OAuth, token handling & connection management. All done for you.

Accounting API connectors ⚡️

Accounting API Resources

Financial Documents

Payments & Banking

Customers & Vendors

Accounting & Ledger

Financial Reports

Organization

Products & Categories

Other Resources

What integrations can you build with the Accounting API?

Accounts Payable

Accounts Receivable

Business Lending

Expense Management

Bank Feeds

Payment Reconciliation

FP&A

Payroll Accounting

Procurement

Tax Automation

Carbon Accounting

Debt Collections

AI Agents for Fintech

What is an accounting API?

Unified accounting API vs. building direct integrations

A new way of buildingAccounting integrations

Traditional integration development

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Accounting API FAQ

Launch accounting integrations in weeks, not months

OAuth, token handling & connection management.
All done for you.

A new way of building
Accounting integrations