Invoicing APIs
Create, retrieve, update, and cancel invoices from your website, app, ERP, marketplace, or internal system.
Explore Invoicing APIs →Integrate Refrens API with your website, app, ERP, marketplace, or internal system. Automate invoice creation, synchronize inventory operations, and create or update leads without repetitive data entry.
Automate document creation, GST e-invoicing, inventory operations, and lead management from the systems your business already uses.
Create, retrieve, update, and cancel invoices from your website, app, ERP, marketplace, or internal system.
Explore Invoicing APIs →Generate an IRN and receive e-invoice details, a signed invoice, and a signed QR code for GST e-invoicing.
Explore E-Invoicing APIs →
Connect external systems with the business workflows managed inside Refrens.
Create and manage inventory items, find transactions, adjust stock, and transfer stock between warehouses.
Explore Inventory APIs →Create and update leads, connect clients and contacts, assign team members, and map pipelines and stages.
Explore Sales CRM APIs →Keep invoicing, GST e-invoicing, inventory, and lead data moving through supported workflows.
Explore the capabilities and supported workflows available across Refrens APIs.

Create, retrieve, update, share, and cancel invoices from your website, application, ERP, marketplace, or internal system.
Create invoices with supported invoice, contact, item, tax, currency, due date, and payment details.
Use the invoice view link and PDF link returned with the invoice response.
Send invoices to customers through the supported email workflow.
Add invoice payments with the amount, date, payment method, reference ID, and notes.

Generate an Invoice Reference Number for an existing Refrens invoice and retrieve the related e-invoice response.
Generate an e-invoice for an invoice already created in Refrens.
Generate the Invoice Reference Number through the supported API request.
Receive the signed invoice returned after successful e-invoice generation.
Receive the signed QR code returned with the e-invoice details.

Create and manage inventory items, find inventory transactions, adjust stock, and transfer stock between warehouses.
Create, find, and update inventory items through the supported APIs.
Find transactions using supported filters such as SKU, date, document type, warehouse, client, and transaction type.
Manually increase or decrease stock through the supported stock adjustment workflow.
Transfer stock between warehouses and record the movement in Refrens.

Create and update leads, connect clients and contacts, assign team members, map pipelines and stages, and update supported lead information.
Create new leads or update existing leads from an external system.
Connect supported client and contact information with the lead.
Place leads in the supported pipeline and stage during creation or update.
Assign team members and update supported sources, tags, budgets, notes, comments, and custom fields.
Create, retrieve, update, share, and cancel invoices using supported details sent from your website, application, ERP, marketplace, or internal system.
Invoicing APIs →Generate an Invoice Reference Number for an existing Refrens invoice and retrieve the related signed invoice and signed QR code.
E-Invoicing APIs →Create and manage inventory items, find inventory transactions, adjust stock, and transfer stock between warehouses.
Inventory APIs →Create and update leads, connect clients and contacts, assign team members, map pipelines and stages, and update supported lead information.
Sales CRM APIs →Use the Refrens Shopify app to create invoices from Shopify orders and record related billing actions in Refrens.
Shopify App →Use Pabbly Connect to connect Refrens with supported applications and automate supported invoicing workflows.
Integrations →Review available endpoints, authentication requirements, request parameters, response formats, and HTTP response codes in the Refrens API documentation.
Explore documented endpoints for creating and retrieving supported resources across Refrens APIs.
View documentation →Review how to obtain or self-sign a JWT token and pass it through the Authorization header for supported endpoints.
View authentication →Review path parameters, query parameters, headers, request bodies, JSON responses, and documented success and error codes.
View example →API access must be enabled for your Refrens business. Contact Refrens support to enable access for an eligible account.
Get started →










We offer a free trial for all our users to try out all our premium features. If you wish to upgrade the account or create invoices via API, a fee is charged.
Yes, you can migrate anytime. You can export all your invoices, quotations, proforma invoices and other such documents in CSV format which can be used to import on other software or tool.
Refrens is always available to support our customers via email support(care@refrens.com), live chat support, and also over phone call and WhatsApp (+91 9104043036).
Yes. Your data is stored securely with encryption and cloud protection. We are ISO/IEC 27001:2022 certified. Your data stays private and is safely stored on the cloud.
Please ping us on chat support with your name, email and phone number details, we will get back to you. Or email us at care@refrens.com
In today's digital landscape, businesses are continually seeking innovative solutions to streamline operations, enhance efficiency, and boost profitability. One critical area ripe for transformation is invoicing. Traditional invoicing processes are often manual, time-consuming, and prone to errors, impacting both cash flow and customer satisfaction.
Enter Refrens Invoice API—a powerful tool designed to revolutionize how businesses create, manage, and send invoices, turning a cumbersome task into a seamless, automated workflow.
An Invoice API is a set of programming instructions that allows software applications to communicate and perform invoicing tasks automatically.
The Refrens Invoice API enables developers to integrate robust invoicing functionalities directly into their business applications, websites, or e-commerce platforms. This integration eliminates manual data entry, reduces errors, and accelerates the invoicing process.
For businesses operating within regions that require compliance with Goods and Services Tax (GST), managing tax compliance is a significant concern. The GST Invoice API is a specialized subset that not only automates invoice creation but also ensures that invoices are compliant with GST regulations. It simplifies the complexities involved in calculating tax rates, tax amounts, and generating tax-compliant invoice formats, making it an invaluable tool for businesses looking to streamline their GST invoicing process.
Shopify, one of the leading e-commerce platforms, offers its own Invoice API, allowing merchants to create, send, and manage invoices directly within the Shopify ecosystem. The Shopify Invoice API is designed to cater to the unique needs of online retailers, providing a seamless integration with the Shopify store and enabling automated invoice generation upon order placement. This not only enhances operational efficiency but also improves the customer experience by ensuring timely and accurate billing.
Connecting Refrens with your favorite third-party applications is now effortless with Pabbly Connect integration. Automate workflows and tasks to enhance productivity.
What You Can Do
Benefits of Pabbly Connect Integration
The advantages of integrating an Invoice API into your business operations are manifold:
1. Efficiency and Time Savings: Automation reduces the time spent on manual invoice processing, allowing businesses to allocate resources to more strategic tasks.
2. Accuracy and Reduced Errors: By minimizing manual data entry, the chances of errors are significantly reduced, leading to more accurate billing and fewer disputes.
3. Improved Cash Flow: Faster invoicing can lead to quicker payments, improving the business's cash flow.
4. Scalability: As your business grows, an Invoice API can easily handle an increasing volume of transactions without the need for additional resources.
5. Compliance: For businesses subject to specific tax regulations, like GST, specialized APIs ensure that invoices are always compliant, reducing the risk of penalties.
When selecting an Invoice API, consider the following factors:
1. Integration: Ensure the API integrates seamlessly with your existing systems and workflows.
2. Customization: Look for an API that offers customizable invoice templates to match your brand.
3. Security: Choose an API that provides robust security features to protect sensitive financial data.
4. Support: Consider the level of support and documentation provided to facilitate a smooth integration process.
In the quest for operational efficiency and compliance, an Invoice API stands out as a key tool for businesses across various sectors. Whether you're in need of a GST Invoice API to comply with tax regulations or seeking a solution like the Shopify Invoice API to enhance your e-commerce operations, the right Invoice API can significantly transform your invoicing process. By automating and streamlining billing operations, businesses can focus on growth and innovation, leaving the complexities of invoicing to their chosen API solution.






