Everything you need to integrate with the QuickBooks API
In-depth articles and integration guides
Automating invoicing is one of the most common QuickBooks integrations. This guide covers the QuickBooks Invoice API in depth and shows how a unified API dramatically simplifies the developer experience.
If you're planning to build an integration with the QuickBooks Online API, understanding the pricing structure is crucial for budgeting and architectural decisions. While the QuickBooks API was historically free with no volume restrictions, Intuit introduced a significant change in 2025 with the launch of the Intuit App Partner Program.
Learn how to build an integration with the QuickBooks Desktop API in 2026, including SOAP service setup, Web Connector configuration, and QBXML implementation. Complete guide with code examples, common pitfalls, and production-ready patterns for connecting your app to QuickBooks Desktop.
In this article, you'll understand how the API works, how you can connect to it, and how you can actually use it to perform various tasks, such as automatically updating accounts, invoices, bills, and more. Furthermore, you'll learn about the Apideck Unified API platform that simplifies the entire process.
Skip Intuit's 500-page docs and get your QuickBooks API keys in 7 steps - with every gotcha that'll waste your week spelled out.
This guide explains why ERP integration is critical for fintech and SaaS platforms and why it’s often such a bottleneck. You’ll learn the key challenges of connecting QuickBooks, NetSuite, and Sage, common pitfalls that derail projects, best practices for implementation, and how unified APIs can simplify integrations, cut costs, and speed up time to market.
Learn how to integrate the QuickBooks API into a FastAPI app for seamless accounting automation. This step-by-step guide covers developer account setup, OAuth 2.0 authentication, fetching financial data, creating invoices, handling errors, and implementing security best practices.
Learn what an API aggregator is, how it works under the hood, and what to look for when choosing one. Covers open banking, accounting, HRIS, and CRM aggregators.
A practical guide to accounting software integration for SaaS teams covering architecture choices real costs build vs buy decisions and how to scale integrations without wasting engineering time or budget.
This guide details how to use the Workday Financials API, covering authentication via an Integration System User (ISU) or OAuth 2.0. It also presents a unified API provider like Apideck as a simpler alternative for connecting to Workday and over 20 other accounting platforms.
This guide covers everything you need to know about the Exact Online API: authentication flows, rate limits, endpoint patterns, common pitfalls, and how to build production-ready integrations without the typical headaches.
Direct integrations work until maintenance costs outpace development. Learn when fintech teams should shift from building custom connections to leveraging data aggregators and unified APIs for scalable integration infrastructure.
A technical comparison of Unified.to alternatives for 2026, examining its architecture alongside platforms like Apideck, Merge, Codat, Nango, and Plaid, with guidance on matching platform capabilities to your integration requirements.
Learn which accounting integrations require partnerships (QuickBooks, Xero, Sage) vs. ready-to-use connectors. Complete guide to Apideck's 20+ accounting API partnership requirements, fees, and setup steps
Xero's new API pricing starts March 2026. Compare tiers, costs vs QuickBooks and Sage, plus 6 optimization strategies to reduce your integration expenses.
Intuit Enterprise Suite (IES) is Intuit’s AI-powered, cloud-native ERP for mid-market, multi-entity businesses that have outgrown QuickBooks Online. Apideck now supports full IES integration through its Unified Accounting API, allowing SaaS and fintech platforms to connect IES alongside QuickBooks Online and 20+ other ERPs.
Learn how tracking dimensions like departments, locations, classes, and custom categories work across QuickBooks, Xero, NetSuite, and Sage Intacct. Discover best practices for building accounting integrations that handle platform differences gracefully with dynamic dimension discovery, validation, and unified support.
Learn what accounting integrations are, why they're essential for modern SaaS products, and how to build them. This guide covers common use cases, implementation approaches, and what to look for in an integration solution.
Finance teams reject fintech products without bank feed integrations. Learn how unified APIs let you ship automated accounting sync for Xero, QuickBooks, and 20+ platforms in weeks instead of building direct integrations for 18+ months.
In this article, we break down the most common unified API pricing models and explain why consumer based pricing has become the smartest default for modern SaaS teams. You’ll get clear comparisons, real world tradeoffs, and a simple framework for knowing when account based or API call pricing still makes sense, so you can choose a model that stays predictable, supports multi connector adoption, and protects your margins as you scale.
In this deep dive, we break down what NetSuite integration actually looks like in production, from sync patterns and API options to governance limits, concurrency constraints, and the real issues teams run into at scale. With architecture principles, clear decision frameworks, and hands on implementation tips, you’ll walk away with a practical blueprint for building NetSuite integrations that are reliable, secure, and built to handle growth.
In this deep dive, we break down Merge’s per-linked-account pricing vs. Apideck’s consumer-based model and show why the difference matters once customers start connecting multiple systems. With clear plan-by-plan comparisons, real scaling scenarios, and total cost math, you’ll see how each model impacts cost predictability, integration breadth, and long-term unit economics, so you can choose the pricing structure that won’t punish growth.
Building SaaS in 2026? The right accounting API can make or break your product. This article breaks down the 15 APIs that matter most—what they’re best at, key features, and real-world use cases. Plus, the trends shaping integrations this year. A must-read for anyone serious about scaling with seamless financial workflows.
This article gives a technical breakdown of the best Merge API alternatives, comparing architecture, pricing, performance, and developer experience across platforms like Apideck, Paragon, Unified.to, and others. Get the technical details you need to choose the right platform for your stack.
Struggling with accounting API integrations? Learn why building your own can drain engineering resources, delay product development, and introduce compliance risks and why unified APIs are emerging as the superior alternative.
Evaluating Rutter alternatives? Learn which unified API platforms offer deeper accounting integrations, real-time passthrough data access, zero-storage compliance advantages, and transparent pricing models—plus which option fits your roadmap best.
This article breaks down API integration tools, from iPaaS to unified APIs and marketplaces, showing how they save months of development, cut complexity, and help companies scale faster. With real-world examples, it’s a clear guide to choosing the right tool for your business growth.
This article breaks down why teams outgrow Codat and which alternatives actually fix the real pain points, such as stale data, async writes, limited scope, and unpredictable pricing. You’ll get a clear technical comparison of 7 platforms, showing exactly when each one makes sense and when it doesn’t. If you’re building beyond basic accounting or need real-time, scalable integrations, this will save you weeks of wrong decisions.
Accounting APIs sit at the core of modern fintech products, and getting them wrong creates reliability, trust, and compliance risks. This guide covers the architecture, authentication, data modeling, sync strategies, and scaling patterns required to build robust, production-grade accounting integrations for fintech.
Master the fintech API landscape by balancing direct integrations with unified solutions. This guide explores the trade-offs between payments, banking, and accounting APIs to help you scale without the maintenance nightmare.
Accounting integrations fail when teams underestimate domain workflows, platform differences, and long-term maintenance costs. This article outlines the most common failure points in vertical SaaS accounting integrations and the engineering best practices that prevent data drift, rework, and ongoing operational overhead.
Learn how to integrate with the NetSuite REST API, from OAuth 1.0a authentication setup to real-world implementation examples. Discover how Apideck's Unified Accounting API eliminates integration complexity and lets you connect to NetSuite & 20+ ERP applications.
Direct Sage Intacct integrations derail projects with dual APIs, missing sandboxes, and endless maintenance overhead. Apideck normalizes it all into one clean interface, letting you move fast without becoming an accounting expert.
Get your Xero API keys in under 10 minutes with this step-by-step guide covering OAuth setup, client secrets, scopes, and common authentication mistakes developers make.
Open Accounting enables businesses to share real-time financial data from accounting systems like QuickBooks, Xero, and NetSuite with lenders and fintech platforms through APIs.
Building and maintaining integrations is one of the biggest bottlenecks for SaaS teams—especially as customer expectations and API churn accelerate. This article breaks down the leading unified API platforms (Apideck, Merge, Codat, Workato, Unified.to, and Kombo), comparing their architectures, real-time capabilities, pricing models, and developer tradeoffs.
Discover how Unified APIs are transforming the way SaaS companies build and scale integrations. This article breaks down the hidden costs of traditional integrations, shows how Unified APIs cut development time by up to 80%, and explains how they unlock scalability, security, and innovation. Learn how to free your engineering team from endless maintenance and accelerate product growth.
Point to point integrations seem easy at first but quickly turn into a maintenance nightmare. This article reveals why an integration platform is the smarter, scalable path for SaaS companies that want to grow.
This comprehensive guide shows fintech developers and lending platforms how to transform raw accounting data into actionable credit insights using financial statement APIs and proven lending ratios.
Master Microsoft Business Central expense API integration with practical examples, authentication setup, and purchase invoice management. Learn how unified APIs can reduce weeks of complex integration work to days.
Building integrations in-house feels smart at first, until it slows your entire product down. This article reveals the hidden costs of native integrations and shows how unified APIs let you scale faster, cut maintenance, and keep your team focused on what really matters.
Building a Microsoft Business Central API integration means dealing with Azure AD registration, OAuth nuances, and complex permission models. Learn how unified APIs like Apideck cut development time, abstract away authentication challenges, and deliver reliable ERP integrations faster.
Building and maintaining direct integrations with accounting platforms like QuickBooks, Xero, and FreshBooks drains time, slows your go-to-market, and piles up technical debt. This article breaks down why a unified API is the smarter path for fintechs, as it simplifies authentication, standardizes data, and absorbs constant API updates.
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, Rillet, Tailor, and Campfire deliver automation and natural language queries.
Building and maintaining dozens of integrations is draining engineering teams at vertical SaaS and fintech companies. This article breaks down why point-to-point integrations don’t scale, the hidden costs they create, and how a unified API layer can turn months of work into days, freeing teams to focus on product innovation.
Outdated ERPs drain resources and slow growth, while competitors move faster with modern systems. This article explores the hidden costs of legacy platforms, the strengths and trade-offs of established leaders like SAP, NetSuite, and Dynamics, and what’s coming next with AI-native ERPs built for speed, automation, and seamless integration.
This article covers the essentials of using Sage's free, RESTful API, including OAuth 2.0 authentication, mapping data to key endpoints like contacts and invoices, and handling errors.
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