QuickBooks Online Accounting API review
A focused accounting API for syncing QuickBooks Online data with connected applications.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
QuickBooks Online Accounting API connects applications to QuickBooks Online companies and accounting data. It is aimed at developers building integrations that need invoice and journal-entry synchronization, accounting-data creation and updates, or read access to accounts, company information, and reports. Core API operations support creating and updating accounting data, while CorePlus operations provide access to broader read-oriented data. OAuth 2.0 authentication, sandbox companies, API Explorer resources, and SDK resources support application development around the API.
The plan structure is built around API credit allowances rather than a conventional per-connection API price. Builder costs 0 USD per month and includes uncapped Core API credits plus 500,000 CorePlus API credits per month. Silver includes uncapped Core API credits and 1 million CorePlus API credits; Gold raises that CorePlus allowance to 10 million; Platinum raises it to 75 million. For Silver, Gold, and Platinum, variable API fees may apply above the included CorePlus credits. The pricing model suits teams that need to match expected API volume to a tier, while the free Builder plan gives developers a way to start without a monthly charge.
For event-driven integrations, webhooks provide accounting-data event payloads, with signature verification available for validating incoming notifications. The API also supports data-in and data-out workflows, making it suitable for applications that both synchronize records and read financial information. Developers who specifically need QuickBooks Online connectivity should find the feature set aligned with that goal. Teams looking for a broader, multi-platform accounting API or a simple flat per-connection price should consider alternatives instead. Choose this API when QuickBooks Online is the required accounting destination and CorePlus usage can be planned against the available credit tiers.
QuickBooks Online Accounting API pros and cons
- Where it wins
- Invoice and journal-entry access with two-way synchronization
- OAuth 2.0, sandbox companies, and webhook signature verification
- Free Builder plan with uncapped Core API credits
- Where it doesn't
- Paid-tier prices are not provided as conventional monthly amounts
- Variable API fees may apply above included CorePlus credits
- Focused on QuickBooks Online rather than a broad accounting ecosystem
QuickBooks Online Accounting API fact sheet, pricing and score →
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