How do I integrate FreeAgent API with my application?

Apideck provides a unified Accounting API that makes FreeAgent integration simple. Sign up for free, enable FreeAgent in your dashboard, and use our Vault component to let your users connect their FreeAgent accounts. We handle OAuth authentication, token refresh, and data normalization automatically.

What FreeAgent data can I access through Apideck?

Our FreeAgent integration supports 12+ data models including bills, credit notes, invoices, and company. You can perform read and write operations through our unified API, working with the same code structure across all accounting platforms.

How does FreeAgent authentication work with Apideck?

Apideck's Vault handles FreeAgent authentication completely. Your users connect their FreeAgent accounts through our secure, white-label UI. We manage OAuth tokens, automatic refresh, and credential storage, so you never have to implement FreeAgent's auth flow yourself.

How do I keep my app in sync with FreeAgent?

While FreeAgent has limited native webhook support, Apideck provides polling-based sync and virtual webhooks to keep your data current. Configure your sync frequency in the dashboard, and we'll handle fetching updates from FreeAgent.

Why use Apideck instead of FreeAgent's direct API?

Using Apideck's unified API instead of FreeAgent's direct API saves significant development time. You get normalized data models, automatic auth handling, and the same integration code works with 200+ other apps. When FreeAgent updates their API, we handle the changes so your integration keeps working.

How quickly can I build a FreeAgent integration?

Most developers ship a working FreeAgent integration within a day using Apideck. Sign up for a free trial (no credit card required), enable FreeAgent, and make your first API call within minutes. Our SDKs for Node.js, Python, and other languages make implementation straightforward.

FreeAgent Accounting API integration

Build FreeAgent Accounting integrations in minutes, not months. One API to sync permissioned accounting data with FreeAgent and 27+ other apps.

12+ data models

SOC 2 certified

Free trial

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Integration Guide

How to integrate FreeAgent API in 3 steps

Build a production-ready FreeAgent Accounting API integration in minutes, not months. No OAuth headaches, no maintenance burden.

Step 01

Create your Apideck account

Sign up for free and enable FreeAgent in your Apideck dashboard. Configure which accounting data your app needs access to.

Start your free trial
2,500 API calls included
No credit card required

Step 02

Connect FreeAgent via Vault

Use our pre-built Vault component to let your users securely connect their FreeAgent account. We handle OAuth, token refresh, and credential storage.

White-label auth UI
Automatic token refresh
SOC 2 certified storage

Step 03

Start syncing accounting data

Make API calls to read and write accounting data from FreeAgent. Use the same code to connect 200+ other apps.

Normalized data models
Real-time webhooks
Full CRUD support

Start FreeAgent integration

Free trial • No credit card required • Setup in under 5 minutes

Code Example

FreeAgent API integration code

Integrate FreeAgent with just a few lines of code. Our unified Accounting API normalizes data across 200+ integrations, so you write once and connect everywhere.

Normalized responses — same data structure for all accounting apps
Official SDKs — Node.js, Python, and more with TypeScript support
Full documentation — interactive API reference with FreeAgent-specific examples

View FreeAgent API documentation →

import { Apideck } from '@apideck/node'

const apideck = new Apideck({
  apiKey: process.env.APIDECK_API_KEY,
  appId: process.env.APIDECK_APP_ID,
  consumerId: 'user-123'
})

// List invoices from FreeAgent
const { data } = await apideck.accounting.invoicesAll({
  serviceId: 'freeagent'
})

console.log(`Found ${data.length} invoices`)

Explore all SDKs ↓

Why integrate FreeAgent with Apideck?

Build a production-ready FreeAgent integration with enterprise-grade reliability

Ship FreeAgent integration fast

Go live with FreeAgent in days, not months. Our unified Accounting API handles authentication, data normalization, and error handling so your team can focus on building features.

12+ FreeAgent data models

Access 12+ data models for FreeAgent including bills, invoices and customers. Read and write data through a single standardized API.

Real-time webhook coverage

Keep your product synchronized with FreeAgent using webhooks. Receive push updates for invoices, customers, payments, and more without polling.

API Resources

Push and pull FreeAgent data

Use our Unify API to get real-time data from FreeAgent

View API Reference

Technical Specifications

FreeAgent API integration details

Everything you need to know about integrating FreeAgent through our unified Accounting API.

Authentication

OAuth 2.0

Secure token-based authentication

Data Models

12+ resources

Access 12+ normalized data models

Webhooks

Polling supported

Scheduled polling for updates

Security

SOC 2 Type II

Enterprise-grade security certified

Token Management

Automatic refresh

Never worry about expired tokens

API Format

REST + JSON

Standard REST API with JSON responses

FreeAgent direct API vs Apideck unified API

Feature	Direct FreeAgent API	Apideck Unified API
OAuth implementation	Build from scratch	Handled by Vault
Token refresh	Manual handling	Automatic
Data normalization	FreeAgent format only	Normalized across 200+ apps
Error handling	Platform-specific	Unified error codes
Rate limit management	DIY implementation	Built-in throttling
Maintenance	Ongoing updates required	We handle API changes
Additional integrations	Separate work each	Same code, 200+ apps

View complete FreeAgent API reference →

Use Cases

What integrations can you build with FreeAgent?

Power these accounting workflows with FreeAgent data through our unified API.

Accounts Payable

Sync vendor bills, approvals & payments across accounting systems in real time.

Learn more

Accounts Receivable

Push invoices, payment statuses & credits into users' ledgers.

Learn more

Business Lending

Use accounting data to get smarter risk assessments and lending decisions.

Learn more

Expense Management

Pull data to automate spend reporting and reconciliation.

Learn more

Payroll Accounting

Streamline payroll data flow between HR systems and accounting platforms seamlessly.

Learn more

Procurement

Automate purchase orders, vendor management, and spend tracking across ERP and accounting systems.

Learn more

Tax Automation

Connect to accounting data to accurately calculate, file, and reconcile sales tax.

Learn more

Carbon Accounting

Embed sustainability metrics by syncing financial data for carbon footprint tracking and ESG reporting.

Learn more

View all use cases

FreeAgent Integration FAQ

Common questions about integrating FreeAgent with your application

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