Integrate the Quickbooks API.Caddi writes and runs the integration for you.
Quickbooks has a REST API. Self-serve for any developer via the Intuit Developer portal; production QBO apps fall under the Intuit App Partner Program, where the free Builder tier gets unlimited Core (data-in) calls and 500,000 metered CorePlus (data-out) credits per month, and paid Silver/Gold/Platinum tiers get more.
- 99%of agent runs complete successfully
- ~45 minon average to build your first agent
- 1M+back-office tasks completed
The connection is a project before it does anything.
Before the first record moves: an app registration, credentials, token refresh, and somewhere to host and monitor the code. 500 requests per minute per realm ID (company) and 10 concurrent requests per realm ID, and on the Builder tier CorePlus calls over the monthly credit are blocked.
Register an app, store Quickbooks credentials, refresh tokens and code around the rate limits.
Connect your Quickbooks account once. Caddi holds the connection.
The job doesn't stop at Quickbooks.
An intake, a filing or a client update also runs through email, documents and the other systems your team works in. The Quickbooks API only reaches Quickbooks.
Each extra system is another API, another set of credentials, another integration to own.
One automation runs across every tool the job touches, each through its API.
Someone has to own the code.
API versions change, fields get added and your process moves.
A developer patches and redeploys the integration each time.
The person who does the work updates it by showing or describing the change. Every automation is reviewed before it runs in production, and every run is logged.
What the Quickbooks API gives you
- Type
- REST (JSON)
- Authentication
- OAuth 2.0
- Who can get access
- Self-serve for any developer via the Intuit Developer portal; production QBO apps fall under the Intuit App Partner Program, where the free Builder tier gets unlimited Core (data-in) calls and 500,000 metered CorePlus (data-out) credits per month, and paid Silver/Gold/Platinum tiers get more.
- What it covers
- Accounting entities such as customers, vendors, invoices, bills, payments, accounts, items, journal entries and financial reports.
- Limits
- 500 requests per minute per realm ID (company) and 10 concurrent requests per realm ID, and on the Builder tier CorePlus calls over the monthly credit are blocked.
Official docs: developer.intuit.com. Checked September 2026. Vendors change access terms, so confirm with Quickbooks before you build.
When to build the Quickbooks integration in-house
When you have engineers and the integration is your product, or you need one narrow sync between two systems and someone to own it. When the goal is getting Quickbooks work off someone's desk, the build is the slow part, and Caddi does it for you.
What teams usually want the Quickbooks API for
Vendor Bill Creation
Caddi reads vendor payout rows and creates matching bills with the correct vendor, expense categories, and payment terms, reducing manual bill entry for billing and finance teams.
Receipt-to-invoice reconciliation
Caddi extracts payment details from incoming receipts and matches them to the right QuickBooks invoice with the matter or client coded.
Daily payment posting
Each day, Caddi summarizes payments from LawPay or Stripe and posts the journal entries to QuickBooks with the right client coding.
Expense report posting
Caddi pulls approved Expensify reports, applies the firm's coding rules, and posts them to QuickBooks with the right matter/client.
Everything Caddi does with Quickbooks.
Quickbooks API questions
Does Quickbooks have an API?
Yes. Quickbooks has a REST API, authenticated with OAuth 2.0. The official documentation is at https://developer.intuit.com/app/developer/qbo/docs/get-started.
How do I get access to the Quickbooks API?
Self-serve for any developer via the Intuit Developer portal; production QBO apps fall under the Intuit App Partner Program, where the free Builder tier gets unlimited Core (data-in) calls and 500,000 metered CorePlus (data-out) credits per month, and paid Silver/Gold/Platinum tiers get more.
Does the Quickbooks API have rate limits?
500 requests per minute per realm ID (company) and 10 concurrent requests per realm ID, and on the Builder tier CorePlus calls over the monthly credit are blocked.
Can I connect Quickbooks to my other tools without writing code against its API?
Yes. With Caddi you show the Quickbooks task once, the way you'd train a new hire, and Caddi builds it as verified code that runs across Quickbooks and the other tools the job touches. Steps that need a person's judgment are handed to Copilot or Claude, and Caddi monitors those too.
Do I need a developer to automate Quickbooks with Caddi?
No. There is no integration code for you to write or maintain. Every automation Caddi builds for Quickbooks is reviewed before it runs in production, and every run is logged.