Unified Accounting API

Unified Accounting API for financial data management across platforms with standardized charts, transactions, and reports.

What is a Unified API?

A unified API provides a single, standardized interface to interact with multiple third-party providers. Instead of learning each provider’s unique API format, authentication scheme, and data model, you write code once, and StackOne handles the differences.

What StackOne normalizes:

• Data models – Consistent field names and structures across providers (e.g., employees in BambooHR, Workday, and Personio all return the same schema)
• Authentication – OAuth, API keys, and tokens are managed per-provider; you just pass an x-account-id header
• Pagination – Cursor-based pagination works the same regardless of whether the provider uses offsets, pages, or cursors
• Error formats – Standardized error responses with provider-specific details when available

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The StackOne unified API handles financial data management across diverse accounting platforms, managing variations in chart of accounts, transaction structures, and reporting formats while supporting customer-specific workflows and compliance requirements. It enables financial data synchronization, reporting, and analysis without relying on provider-specific schemas. With 2-way API interaction, accounting systems can efficiently manage financial data from multiple sources through a single integration.

Benefits of the Accounting API

Real-Time Data Synchronization

StackOne’s APIs support real-time data polling, allowing for immediate updates and synchronization across platforms.

Privacy-First Design Ensuring Compliance

With a focus on security, StackOne’s architecture avoids unnecessary data storage, maintaining compliance with data protection regulations.

Synthetic and Native Webhooks for Updates

Both synthetic and native webhooks, enable real-time notifications for tickets and comment events.

Comprehensive Integration Coverage

StackOne offers pre-built connectors with a wide range of platforms, simplifying the integration process.

Key Features

Feature	Description
Chart of Accounts Management	Easily create and manage chart of accounts across multiple accounting platforms with unified fields
Transaction Synchronization	Keep financial transactions, journal entries, and balances synchronized across all integrated systems
Real-Time Webhooks	Receive instant notifications for new transactions, account changes, and financial updates
Multi-Entity Support	Manage multiple companies, subsidiaries, and business units within a single integration
Financial Reporting	Generate standardized financial reports and statements across different accounting systems

StackOne SDKs & OpenAPI Specification

Use our official SDKs for faster integration. Build with language-native libraries. Full list here.

OpenAPI Specification

Click here

Popular SDKs

Node.js Java (JVM) PHP Ruby

Entity Model and Relationships

The following diagram illustrates the key entities within the Accounting API:

Entity Definitions

Entity	Description
Company	A business entity with financial records, including base currency and fiscal year settings.
Account	A financial account within the chart of accounts, representing assets, liabilities, equity, revenue, or expenses.
Journal	A journal entry containing multiple lines that maintain accounting equation balance.
JournalLine	Individual line within a journal entry, linked to a specific account with amount and tax details.
Tax Rate	Defines a tax rate (e.g., VAT, GST) for a company, including percentage, code, and status.