Authentication uses OAuth 2.0. In the Zoho API Console (api-console.zoho.in), create a Server-based Application client, configure the redirect URI, and generate your client ID and secret. Exchange these for an access token and refresh token. The access token has a one-hour validity; use the refresh token to renew it automatically. Include the access token in the Authorization header of every API request: Bearer {access_token}.
The base URL for Indian Zoho Books organisations is https://www.zohoapis.in/books/v3/. Append the endpoint (for example, /invoices or /contacts) followed by your organisation ID as a query parameter: ?organization_id=XXXXXXXX.
E-commerce integration: push daily order data from a Shopify or WooCommerce store into Zoho Books as invoices, with customer GSTIN populated from the order data for GST compliance. CRM integration: when a deal closes in Zoho CRM, automatically create a customer and invoice in Zoho Books without manual re-entry. Payroll integration: push monthly salary journal entries from the payroll system into Zoho Books. Inventory sync: pull stock levels from Zoho Books into your e-commerce or ERP system in real time.
The Zoho Books API has rate limits: 100 API calls per minute per organisation. For bulk operations (for example, creating 500 invoices), use batching where the API supports it, or spread requests over time to stay within limits. Always handle API errors (HTTP 429 rate limit, 401 unauthorized, 404 not found) gracefully in your integration code. Store the OAuth refresh token securely and rotate access tokens automatically to avoid authentication failures.
The Zoho Books API is a REST API that allows external applications to read and write data in Zoho Books programmatically, enabling integrations with e-commerce platforms, CRMs, payroll systems, and custom automations.
Generate OAuth credentials from the Zoho API Console. Use the base URL https://www.zohoapis.in/books/v3/ with your organisation ID and OAuth access token. The API documentation covers all endpoints for invoices, contacts, items, reports, and more.
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