The best cloud based small business accounting software. Send invoices, track time, manage receipts, expenses, and accept credit cards. Free 30-day trial.

FreshBooks API profile

API styles

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Webhooks

Webhooks management API

Sandbox environment

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Authentication

Identity protocols

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SSO / Social login

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OAuth playground

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GraphQL playground

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API Explorer

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Postman / Insomnia collections

Run in PostmanRun in Insomnia

OpenAPI/Swagger specs

Free developer account

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App listing requirements

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Pagination style

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CLI

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Query Language

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Community

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GitHub

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Custom object support

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Stackoverflow tags

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Integrations

Ecosystem

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API pricing

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API rate limits

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API changelog

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Status page

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Open-source

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Tutorials

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Samples & examples

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Base endpoint

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GraphQL endpoint

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IDE Extensions

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Estimated developers

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Estimated customers

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Estimated users

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Apideck Unified API

Articles & Guides

Apideck as an Agave Alternative

Evaluating Apideck as an alternative to Agave for software vendors who need accounting and ERP integrations. Covers connector coverage, build vs. buy trade-offs, and who each platform works best for.

Unified APIs for Fintech: When Data Aggregators Stop Scaling

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.

How Fintech Startups Can Integrate with 20+ Accounting Platforms Using a Single API

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.

Top 15 Accounting APIs to Integrate with in 2026

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.

API Aggregator: What It Is, How It Works, and How to Choose One

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.

Accounting & ERP Partnership Guide

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

And 4 more articles available...

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