Unified Accounting API
One Unified Accounting API to integrate with Netsuite, Quickbooks, and all your customers’ favorite Accounting tools.
What is a Unified Accounting API?
Accounting platforms each store data differently, with their own authentication and schemas. A Unified Accounting API standardizes these into one interface — operations like Get Items, Get company Info, Create Payment work the same way no matter which platform is on the other end, while Knit manages translation, rate limiting, retries, and sync management underneath.
Accounting API Operations
Every operation below is real and already live — not a roadmap item. Browse the full API reference →
Retrieve a list of line item SKUs/products used in transactions
Retrieve company-level metadata like name, fiscal year, and address
Create a payment record against an invoice
Programmatically create a new journal entry with line items
Create a new invoice for a contact or account
Create a new contact in the accounting system
Create a new account under chart of accounts
Sync contact details like name, address, phone, email, and user mapping
Sync chart of accounts data
Update a payment record with status or reference changes
Update the line items or status of an invoice
Update existing contact details
Update details of an existing account
Sync purchase orders and associated line items
Sync payment data including payment entries and references
Sync journal entries and associated line items
Sync invoice-level data including entries, addresses, and payment references
Retrieve category/tag structure used to track expenses or invoices
Fetch all tax rates configured in the accounting system
Retrieve all agent or admin users
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ERP Integrations For AR & AP Automation
Connect your AR/AP automation platform to QuickBooks, Xero, NetSuite, Sage, and 12+ accounting and ERP systems. Enable your customers to…
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Financial Planning & Analysis (FP&A) Platform Integrations
Connect your FP&A platform to Oracle, SAP, Microsoft Dynamics, and 100+ ERPs and data sources. Enable finance teams to build…
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ERP Integrations for B2B Lending and Invoice Financing
Pull credit scores/KYC data, import borrower bank statements, and push repayment schedules into accounting alongside chart-of-accounts and AP/AR sync.
Explore this use case17 Accounting apps you can integrate with today
Acumatica
Acumatica integrates via Knit's Unified Accounting API — one schema, one integration.
ClearBooks
ClearBooks integrates via Knit's Unified Accounting API — one schema, one integration.
Dynamics 365 Accounting
Ship Dynamics 365 Accounting API integration via Knit's Unified Accounting API — live in days, not weeks.
FreshBooks
Enable FreshBooks API integration via Knit's Unified Accounting API — live in days, not weeks.
MS Dynamics Business Central
Power Microsoft Dynamics 365 Business Central API integration via Knit's Unified Accounting API — no per-platform maintenance.
Netsuite Accounting
Netsuite Accounting integrates via Knit's Unified Accounting API — no per-platform maintenance.
odoo
Enable Odoo API integration via Knit's Unified Accounting API — one schema, one integration.
Oracle Financials
Oracle Financials integrates via Knit's Unified Accounting API — live in days, not weeks.
QuickBooks
QuickBooks integrates via Knit's Unified Accounting API — live in days, not weeks.
Sage 200
Enable Sage 200 API integration via Knit's Unified Accounting API — no per-platform maintenance.
Sage Intacct
Launch Sage Intacct API integration via Knit's Unified Accounting API — one schema, one integration.
SAP S/4HANA Cloud Public Edition
Enable SAP S/4HANA Cloud Public Edition API integration via Knit's Unified Accounting API — no per-platform maintenance.
Tally Prime
Build Tally Prime API integration via Knit's Unified Accounting API — no per-platform maintenance.
Wave Financial
Ship Wave Financial API integration via Knit's Unified Accounting API — live in days, not weeks.
Workday Accounting API
Workday Accounting API integrates via Knit's Unified Accounting API — one schema, one integration.
Xero
Power Xero API integration via Knit's Unified Accounting API — no per-platform maintenance.
Zoho Books
Power Zoho Books API integration via Knit's Unified Accounting API — one schema, one integration.
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Why Knit for Accounting integrations
Extensive webhook support
Real-time sync without constant polling — get notified the moment Accounting data changes.
Scalable infra
Sync thousands of Accounting records in minutes, not hours.
Add a missing app in days
AI-powered connector building means a missing Accounting platform isn't a months-long wait.
Unified Accounting API vs. building it yourself
Building it yourself
- A separate integration for every Accounting platform you support
- Different schema, auth, and pagination per platform
- You build and maintain OAuth for each platform
- Poll each API on your own schedule
- Engineering effort grows with every new platform
- Weeks to months per platform, per engineer
With Knit
- One Unified Accounting API covers every platform you support
- One normalized schema across every platform
- Embedded Auth handles OAuth, storage, and refresh for you
- Extensive webhook support for real-time sync
- Describe a missing app to the Integrations Agent and get it built instantly
- Live in days, not months
Customer Stories
See how leading technology firms are scaling their operations
Amazing Product With Exceptional Support from the team. By using Knit we managed to speed up our development by orders of magnitude.
A brilliant tool to let you seamlessly integrate with many different systems. It is very easy to integrate with and customer support is next level.
Seamless integration experience. Well-documented, self-explanatory APIs, and excellent service and support.
Easy to integrate. Knit's dashboard is intuitive for setting up and testing integrations, and the sandbox is extremely useful during development.
Knit shipped a brand-new Timesheet API in a week and handed us a ready-to-use NetSuite sandbox. That velocity is priceless when you're running payroll in 40+ countries.
#1 in Ease of Integrations
4.9 out of 5 stars on G2
Common questions about the Unified Accounting API
Which Accounting systems does Knit support?
17 Accounting platforms today — including Acumatica, ClearBooks, Dynamics 365 Accounting and more. Missing one you need? Knit's AI-assisted connector-build process typically adds a new one within days.
Does the Unified Accounting API support both reading and writing data?
Yes. It supports both reads and writes, so you can build bi-directional sync use cases — not just pull Accounting data, but push updates back to the source app.
How does authentication work across Accounting platforms?
Knit provides an embedded Auth component (white-labeling available on higher tiers) that handles OAuth, credential storage, and refresh — your customers authorize once through Knit, and you never touch raw credentials.
What is the timeline for adding a missing Accounting connector?
Typically days, not months — the same AI-based connector-build tooling that lets us maintain the 17 Accounting connectors already live.
Do you store Accounting data or customer PII?
No. Knit acts as a stateless passthrough — data is processed on our application server and sent directly to your webhooks, without being stored on Knit's servers.
What is the pricing model, and is there a free trial?
You choose the model that fits your business — pricing based on integrated accounts, or based on API call volume. Every plan includes a 30-day free trial before billing starts.
Guides in this topic
- Developer’s Guide to Accounting API Integration
- ERP API Integration Guides & Resources
- Full list of Knit’s Accounting API Guides
- Sync Expense data to ERP / Accounting
Accounting API guides by app
- FreshBooks API Directory
- NetSuite API Integration Guide (In-Depth) : REST, SuiteQL & SuiteScript (2026)
- Odoo API Integration Guide(In Depth): XML-RPC, JSON-RPC & REST (2026)
- Oracle Financials API Integration Guide: REST & OAuth 2.0
- Quickbooks Online API Integration Guide (In-Depth): OAuth, Endpoints & Webhooks (2026)
- Deep-Dive Developer Guide to Building a Sage 200 API Integration
- Sage Intacct API Integration Guide: REST, XML & Auth (2026)
- Wave Financial API Integration Guide (In-Depth)
- Xero API Integration Guide (In-Depth)
- Zohobooks API Integration Guide (In-Depth)