Accounting OAuth 2.0

QuickBooks REST API

Accounting and financial management REST API

QuickBooks API provides programmatic access to accounting, invoicing, and financial management features. Developers use it to integrate QuickBooks' robust accounting capabilities into their applications, automate bookkeeping tasks, sync financial data, and build custom reporting solutions. The API supports comprehensive accounting operations including customers, invoices, payments, expenses, and tax management.

Base URL https://quickbooks.api.intuit.com/v3/company

API Endpoints

Method	Endpoint	Description
GET	`/company/{realmId}/invoice/{invoiceId}`	Retrieve details of a specific invoice by ID
POST	`/company/{realmId}/invoice`	Create a new invoice for a customer
POST	`/company/{realmId}/customer`	Create a new customer record
GET	`/company/{realmId}/query`	Execute SQL-like queries to retrieve data
POST	`/company/{realmId}/payment`	Record a payment received from a customer
POST	`/company/{realmId}/bill`	Create a bill from a vendor
GET	`/company/{realmId}/account/{accountId}`	Retrieve a specific chart of accounts entry
POST	`/company/{realmId}/purchase`	Create a purchase transaction or expense
GET	`/company/{realmId}/companyinfo/{companyId}`	Get company profile and settings information
POST	`/company/{realmId}/estimate`	Create a sales estimate or quote for a customer
GET	`/company/{realmId}/reports/ProfitAndLoss`	Generate a profit and loss statement report
POST	`/company/{realmId}/journalentry`	Create a manual journal entry for accounting adjustments
GET	`/company/{realmId}/taxcode/{taxCodeId}`	Retrieve tax code information and rates
POST	`/company/{realmId}/item`	Create a new product or service item
GET	`/company/{realmId}/reports/BalanceSheet`	Generate a balance sheet financial report

Code Examples

curl -X GET \
  'https://quickbooks.api.intuit.com/v3/company/1234567890/query?query=SELECT * FROM Invoice WHERE Id = '123'' \
  -H 'Authorization: Bearer eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9...' \
  -H 'Accept: application/json'

const realmId = '1234567890';
const accessToken = 'eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9...';

const response = await fetch(
  `https://quickbooks.api.intuit.com/v3/company/${realmId}/invoice`,
  {
    method: 'POST',
    headers: {
      'Authorization': `Bearer ${accessToken}`,
      'Content-Type': 'application/json',
      'Accept': 'application/json'
    },
    body: JSON.stringify({
      Line: [{
        Amount: 100.00,
        DetailType: 'SalesItemLineDetail',
        SalesItemLineDetail: {
          ItemRef: { value: '1' }
        }
      }],
      CustomerRef: { value: '1' }
    })
  }
);

const invoice = await response.json();
console.log(invoice);

import requests

realm_id = '1234567890'
access_token = 'eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9...'

headers = {
    'Authorization': f'Bearer {access_token}',
    'Content-Type': 'application/json',
    'Accept': 'application/json'
}

response = requests.get(
    f'https://quickbooks.api.intuit.com/v3/company/{realm_id}/query',
    headers=headers,
    params={'query': 'SELECT * FROM Customer WHERE Active = true'}
)

customers = response.json()
print(customers)

Connect QuickBooks to AI

Deploy a QuickBooks MCP server on IOX Cloud and connect it to Claude, ChatGPT, Cursor, or any AI client. Your AI assistant gets direct access to QuickBooks through these tools:

create_invoice Create and send invoices to customers with line items, tax calculations, and payment terms

query_financial_data Execute SQL-like queries to retrieve customers, invoices, payments, and other accounting data

record_expense Record business expenses and purchases with vendor information and categorization

generate_financial_report Generate profit & loss, balance sheet, and cash flow reports for specified date ranges

reconcile_payments Match and record customer payments against outstanding invoices and update balances

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QuickBooks REST API

API Endpoints

Code Examples

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