Integrate Rillet 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 Rillet-specific examples

View Rillet 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 Rillet
const { data } = await apideck.accounting.invoicesAll({
 serviceId: 'rillet'
})

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

Explore all SDKs ↓

Why integrate Rillet with Apideck?

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

Ship Rillet integration fast

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

18+ Rillet data models

Access 18+ data models for Rillet including customers, invoices and payments. Read and write data through a single standardized API.

Real-time webhook coverage

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

Get started for free

API Resources

Push and pull Rillet data

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

Accounts

Accounting API

Tax Rates

Accounting API

Organizations

Accounting API

Invoices

Accounting API

Customers

Accounting API

Bills

Accounting API

Vendors

Accounting API

Products

Accounting API

Invoice Payments

Accounting API

Credit Memos

Accounting API

Journal Entries

Accounting API

Subsidiaries

Accounting API

Balance Sheet

Accounting API

Income Statement

Accounting API

Bill Payments

Accounting API

Charges

Accounting API

Bank Transactions

Accounting API

Bank Accounts

Accounting API

View API Reference

Technical Specifications

Rillet API integration details

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

Authentication

API Key

Simple key-based authentication

Data Models

18+ resources

Access 18+ normalized data models

Webhooks

Native webhooks

Real-time data sync on changes

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

Rillet direct API vs Apideck unified API

Feature	Direct Rillet API	Apideck Unified API
OAuth implementation	Build from scratch	Handled by Vault
Token refresh	Manual handling	Automatic
Data normalization	Rillet 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 Rillet API reference →

Use Cases

What integrations can you build with Rillet?

Power these accounting workflows with Rillet 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

FP&A

Pull real-time financial data for budgeting, forecasting, and financial analysis.

Learn more

Payroll Accounting

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

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

Rillet Integration FAQ

Common questions about integrating Rillet with your application

Learn more about Rillet

Discover insights, developer guides, and best practices for working with Rillet integrations.

👁 Bookkeeping vs Accounting Software: Why AI Is Splitting the Bundle

Bookkeeping vs Accounting Software: Why AI Is Splitting the Bundle

Bookkeeping and accounting software have always been bundled. AI-native entrants like Kick, Puzzle, Rillet, Campfire, and DualEntry are splitting them apart.

👁 GJ

May 22, 2026

👁 How to Integrate with the Rillet API in 2026

How to Integrate with the Rillet API in 2026

A practical guide to integrating with the Rillet API in 2026: authentication, pagination, idempotency, webhooks, incremental sync, financial reports, and the new MCP server for AI coding tools.

👁 GJ

Mar 11, 2026

👁 Next-Gen ERPs and the Future of Enterprise Systems

Next-Gen ERPs and the Future of Enterprise Systems

Traditional ERPs demand long, costly implementations—but a new generation is rewriting the rules. In this article, we explore how AI-native platforms like Odoo, DualEntry, Digits, Rillet, Tailor, and Campfire deliver automation and natural language queries.

👁 Kateryna Poryvay

Kateryna Poryvay

Aug 21, 2025

View all articles View developer guides

More 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 logo

Access Financials

live 👁 Acumatica logo

Acumatica

live 👁 AFAS Software logo

AFAS Software

live 👁 Alegra logo

Alegra

live 👁 banqUP logo

banqUP

live 👁 Campfire logo

Campfire