Connect your SaaS, fintech, or marketplace product to QuickBooks, Xero, NetSuite and other accounting systems through one normalized API layer. Start with production-tested connector architecture for authentication, data normalization, platform routing, sync, error handling, and accounting data exchange instead of building every integration foundation independently.
Satva’s Unified Accounting API Accelerator is a pre-built integration foundation for SaaS products, fintech applications, marketplaces, and software platforms that need to connect with multiple accounting and ERP systems.
Instead of building separate integration architecture for QuickBooks, Xero, NetSuite, FreshBooks, Zoho Books and other platforms, your product communicates through a common REST API and normalized accounting data model.
The accelerator handles common integration infrastructure such as platform authentication, field normalization, connector routing, API errors, retries, rate limits, webhooks, and scheduled synchronization.
Your engineering team can then adapt the foundation to your product-specific workflows, mappings, business rules, and customer experience.
SaaS • Fintech • Marketplaces • Product Teams
REST API • OAuth • Normalization • Webhooks • Background Sync • Error Handling
Accounts • Invoices • Payments • Transactions • Contacts • Tax Rates • Financial Reports
Your SaaS customers rarely use the same accounting system.
One customer may use QuickBooks Online, another Xero, while a larger account may depend on NetSuite or another ERP.
Supporting each platform directly means dealing with different authentication flows, field structures, API endpoints, rate limits, error responses, and synchronization requirements.
The accounting concepts may be similar, but the APIs are not.
An invoice, customer, account, payment, or journal entry can be represented differently across every platform. As additional accounting integrations are added, engineering teams end up maintaining multiple versions of the same integration logic.
A unified accounting API introduces a common layer between your product and those accounting systems.
Your application works with normalized accounting models and consistent endpoints, while platform-specific connectors handle authentication, field mapping, requests, responses, and exceptions behind the API layer.
Here’s a straightforward comparison of what integration life looks like with and without a unified layer:
✕ Separate connector logic for each accounting platform
✕ Platform-specific field names and data structures
✕ Different OAuth and authentication workflows
✕ Individual rate-limit and retry handling
✕ Separate error-handling logic
✕ Growing maintenance requirements as platforms are added
✓ Common REST endpoints across supported accounting systems
✓ Normalized accounting objects and field structures
✓ Centralized connector routing
✓ Consistent error responses
✓ Shared authentication and sync architecture
✓ A reusable foundation for adding accounting platforms
he accelerator provides a common integration architecture across accounting and ERP platforms while each connector handles the requirements of its underlying system.
Core connector coverage currently includes QuickBooks, Xero, NetSuite, FreshBooks, Zoho Books, and Clear Books.
Need MS Dynamics Business Central, Sage Intacct, or SAP? Those are available too, just on one of our extended plans.
Additional integration requirements can include platforms such as Microsoft Dynamics 365 Business Central, Sage Intacct, SAP, and other accounting systems based on the implementation scope. Discuss your required platform mix during the accelerator demo.
The Unified Accounting API sits between your SaaS application and each connected accounting platform.
Your application sends a standard REST request using a common accounting model.
The API validates and normalizes the request, identifies the customer’s connected accounting system, routes the request through the relevant platform connector, and transforms the resulting response back into the unified schema.
Here’s what happens when you make a request:
Your Application - Frontend or backend makes a standard REST call to the Unified API
↓ Request received at Unified API layer
Field Normalizer Validates and maps your request fields to platform-specific format
Platform Router Identifies the connected platform and dispatches to the right connector
Platform Connector Authenticates with the platform, makes the API call, handles errors
↓ Response normalized back to unified schema
Your Application Receives one consistent JSON response - always the same structure
The part that makes this powerful is that each accounting platform has its own dedicated connection.
All the complicated, platform-specific stuff lives there completely out of sight. When we add support for a new platform, nothing on your end needs to change.
Different accounting workflows require different processing patterns.
Synchronous requests can support operations where the application needs an immediate response, such as retrieving an account, invoice, customer, or other individual record.
Background processing can be used for larger synchronization jobs involving substantial transaction volumes or multiple accounting objects. These jobs can be processed asynchronously and monitored through callbacks, webhooks, or job-status workflows depending on the implementation.
Accounting integrations become more complex as the number of connected customers, transactions, and supported platforms grows.
The accelerator is designed to provide reusable infrastructure for common production requirements rather than leaving each SaaS team to solve them independently.
Large imports and synchronization tasks can be processed outside the request-response cycle so high-volume jobs do not depend on a single long-running API request.
Platform connectors can account for API-specific limits and apply connector-level handling rather than forcing your product to implement separate rate-limit logic for every accounting system.
Normalized error structures make it possible to build common application behavior around authentication failures, invalid data, unavailable platforms, rate limits, and missing records.
Supported endpoints can use modification timestamps and pagination to retrieve data incrementally rather than repeatedly requesting an entire accounting dataset.
Depending on the underlying platform and workflow, accounting data can be synchronized through event-driven webhooks, scheduled jobs, or a combination of both.
SaaS platforms and marketplaces can use the integration layer as the common accounting foundation while maintaining customer-specific accounting connections and workflows.
Chart of accounts is a useful example of why accounting data normalization matters.
QuickBooks, Xero, FreshBooks, Zoho Books, Clear Books, and NetSuite can represent similar accounting concepts using different field names, structures, and supported attributes.
The Unified Accounting API maps platform-specific account data into a common model so your application can work with predictable fields regardless of the connected accounting system.
The mapping reference below shows how the common account model relates to fields exposed by individual platforms.
The table below shows exactly how each platform names these fields behind the scenes.
You’ll always see our unified field names in your responses this is just so you understand what’s happening under the hood.
A couple of things to keep in mind before you dive in:
Fields marked * are required they will always be there in every response, no exceptions.
Fields showing simply mean that particular platform doesn’t support that field. It’s not an error, it’s just not something they track.
Note on Xero’s isActive field: Xero’s Status field has three possible values: Active, Archive, and Deleted.
The unified isActive field maps to true only when Status equals ‘Active’. Archive and Deleted accounts are returned as isActive: false.
Not every accounting platform tracks the same information and that’s okay.
The table below gives you a clear picture of which fields are available on each platform, so you can make smart decisions about what to show your users and what to filter on.
If a field is ticked for a platform, you can count on it being there.
If it’s not, it’s worth having a fallback in mind or simply not surfacing that field for users on that platform.
A normalized API response allows your application to consume one predictable structure even when the source accounting platform changes.
The following example shows a unified account response.
GET /api/v1/accounts/{accountId} → 200 OK { "accountId": "acc_7f3a2b14-9c8d-4e1f", "accountCode": "1200", "accountName": "Trade Debtors / Accounts Receivable", "accountType": "CURRENT_ASSET", "accountSubType": "AccountsReceivable", "classification": "ASSET", "description": "Money owed to the business by customers", "currency": "USD", "isActive": true, "isBankAccount": false, "isSubAccount": false, "currentBalance": 48230.00, "parentRef": null, "modifiedDate": "2025-04-12T08:33:17Z", "_meta": { "platform": "xero", "rawId": "bd9f2c1a-4518-4c3e-8b72-f190e4a6c3d1", "syncedAt": "2025-04-12T08:40:02Z" } }
Fields such as accountId, accountName, accountType, currency, and modifiedDate use the unified model rather than exposing a different response structure for every accounting platform.
The _meta object preserves useful source information, including the connected platform, the platform’s original record identifier, and synchronization metadata.
This gives your product a normalized application model while still retaining enough source context for troubleshooting, record linking, and platform-specific workflows.
The accelerator exposes common REST endpoints for frequently used accounting objects and financial data.
Depending on the connected accounting platform and implementation scope, SaaS products can use the unified layer to retrieve or exchange chart-of-accounts data, invoices, payments, transactions, contacts, tax information, reports, and journal entries.
These query parameters work across all list endpoints:
Retrieve normalized account records and account classifications.
Retrieve invoices using common filters and response models.
Access payment records and their related invoice references.
Retrieve transaction data and perform incremental synchronization.
Work with contacts through a common contact model.
Create journal entries using a normalized request model where supported.
Retrieve available tax codes and rates from the connected platform.
Access financial data such as balance sheets and profit-and-loss reports.
Every accounting platform exposes errors differently. A unified error model gives your application one consistent structure for handling common integration failures.
Connector-specific failures can be translated into normalized API responses covering validation errors, expired authentication, permission issues, missing records, platform rate limits, and service availability.
Individual accounting platforms impose their own API limits. The connector layer can isolate those platform-specific rules from your product so common retry, queueing, and error-handling workflows can be managed centrally.
A 429 RATE_LIMITED response should expose the relevant retry behavior to the application while the connector continues to handle platform-specific implementation details.
Add accounting connectivity to vertical software without building separate foundational integration architecture for every accounting system your customers use.
Sync operational data such as invoices, customers, payments, transactions, and financial records into customer accounting systems.
Connect financial workflows with the customer’s accounting system of record while working through consistent data models and endpoints.
Support sellers or merchants using different accounting systems through a common integration architecture designed for multiple customer connections.
Send billing, invoice, payment, and customer data into accounting systems while keeping application logic consistent across connectors.
Exchange suppliers, accounts, purchase-related transactions, bills, payments, and related accounting information with supported ERP and accounting systems.
Direct integrations can still make sense when your product supports only one accounting platform or requires highly platform-specific capabilities.
A unified accounting API becomes more valuable when your roadmap requires multiple accounting systems and much of the integration logic can be standardized across them.
The accelerator does not eliminate implementation work. It provides a tested foundation that can be adapted to your product’s accounting workflow, customer requirements, mapping rules, and production environment.
SaaS platforms adding accounting connectivity to close enterprise deals. Fintech apps syncing invoices, payments, and customers to a client's books of record. Product teams that lost a quarter to "Do you integrate with QuickBooks?"
Unified REST API with normalized objects across platforms. OAuth 2.0 connection flows for QuickBooks Online, Xero, and NetSuite. Webhooks and scheduled sync for invoices, bills, payments, customers, and chart-of-accounts data. Production-tested error handling, rate-limit management, and retry logic.
A lightweight desktop companion that keeps Tally Prime and your cloud accounting platform in continuous alignment. Masters flow out, approved bills flow…
Testing accounting workflows usually requires large volumes of realistic financial data.
Managing receipts and bills shouldn’t require returning to your desk. With the Accounting