Integrate the Zoho Books API.Caddi writes and runs the integration for you.
Zoho Books has a REST API. Self-serve for Zoho Books customers on any plan including Free, with daily call quotas set by plan.
- 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. 100 requests/minute per organization plus daily caps by plan (Free 1,000, Standard 2,000, Professional 5,000, Premium/Elite/Ultimate 10,000), and 5 concurrent calls on Free or 10 on paid plans.
Register an app, store Zoho Books credentials, refresh tokens and code around the rate limits.
Connect your Zoho Books account once. Caddi holds the connection.
The job doesn't stop at Zoho Books.
An intake, a filing or a client update also runs through email, documents and the other systems your team works in. The Zoho Books API only reaches Zoho Books.
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 Zoho Books API gives you
- Type
- REST (JSON)
- Authentication
- OAuth 2.0
- Who can get access
- Self-serve for Zoho Books customers on any plan including Free, with daily call quotas set by plan.
- What it covers
- Accounting objects such as contacts, invoices, estimates, bills, expenses, payments, items, and chart of accounts.
- Limits
- 100 requests/minute per organization plus daily caps by plan (Free 1,000, Standard 2,000, Professional 5,000, Premium/Elite/Ultimate 10,000), and 5 concurrent calls on Free or 10 on paid plans.
Official docs: zoho.com. Checked September 2026. Vendors change access terms, so confirm with Zoho Books before you build.
When to build the Zoho Books 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 Zoho Books work off someone's desk, the build is the slow part, and Caddi does it for you.
What teams usually want the Zoho Books API for
Payment posting
Caddi summarizes payment activity and posts journal entries to Zoho Books with the right customer coding.
Invoice reconciliation
Caddi matches incoming payments to open Zoho Books invoices and writes the reconciled record back to the customer.
Expense posting
Caddi pulls approved expense reports and posts them to Zoho Books with the right cost coding.
Everything Caddi does with Zoho Books.
Zoho Books API questions
Does Zoho Books have an API?
Yes. Zoho Books has a REST API, authenticated with OAuth 2.0. The official documentation is at https://www.zoho.com/books/api/v3/introduction/.
How do I get access to the Zoho Books API?
Self-serve for Zoho Books customers on any plan including Free, with daily call quotas set by plan.
Does the Zoho Books API have rate limits?
100 requests/minute per organization plus daily caps by plan (Free 1,000, Standard 2,000, Professional 5,000, Premium/Elite/Ultimate 10,000), and 5 concurrent calls on Free or 10 on paid plans.
Can I connect Zoho Books to my other tools without writing code against its API?
Yes. With Caddi you show the Zoho Books task once, the way you'd train a new hire, and Caddi builds it as verified code that runs across Zoho Books 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 Zoho Books with Caddi?
No. There is no integration code for you to write or maintain. Every automation Caddi builds for Zoho Books is reviewed before it runs in production, and every run is logged.