GST E-Invoicing API

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What is an e-invoicing API? 

API means Application Programming Interface. APIs for GST e-invoicing work as integration between taxpayers or GSP and the e-Invoicing system to facilitate sharing of data between the taxpayers or GSP and the IRP portal. 

Persons Eligible for use of API 

As per Notification No. 17/2022 on 01st August 2022, the e-Invoicing system will get extended to those whose annual aggregate turnover ranges from Rs.10 crore, starting from 1st October 2022.

Taxpayers and GSPs can use API to follow various GST compliances. Eligible businesses based on their turnover can use such APIs for e-invoice generation. In accordance with the latest notification, all the entities having a turnover of more than Rs. 10 crores are eligible to use APIs to generate e-invoices from 1st October 2022.

Exemption from e-invoicing and QR code generation has been granted to following Sectors, 

  • NBFC 

  • Insurance and Banking companies 

  • Financial Institutions 

  • Goods Transportation Agency (GTA) 

  • Passenger Transportation Services 

  • Movie Tickets.  

Types of e-Invoicing API Integration 

  • Direct API Integration 

  • GST Suvidha Provider’s (GSP) Integration 

Purpose of E-invoicing API 

It simplifies the process of E-invoicing as API act as a bridge between taxpayers and the e-invoicing system. Third-party applications associate with the GST filing system through GST APIs thus, supplementing the taxpayers’ convenience. 

Taxpayers will create e-invoices under their installed ERP software and the same will be captured on the Invoice Registration Portal (IRP). The IRP has enabled the e-invoice process via API mode. The GSPs/ taxpayers can get their existing ERPs integrated with such APIs, so that they can generate e-invoices directly through their system.  

Types of APIs  

Some of the APIs that are currently Available


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Pre-requisite conditions for e-Invoicing API Integration  

  • Adequate internet bandwidth is required to connect with the e-Invoicing system. 

  • IT Act, 2000 to be strictly followed by an entity. 

  • The entity must have a pre-production system environment to test the Integration. 

  • For accessing the API Taxpayers/GSPs must list at least 4 Indian Static IP addresses. 

  • Traffic originating from GSPs/taxpayers must be free from malware, viruses, intrusions, bots, etc. If any irregularities discover by NIC they may suspend the service. 

  • Security requirements as specified by for application and infrastructure should be followed by Taxpayers/ GSPs 

Benefits of using APIs 

APIs provide the following benefits to the Taxpayers/ GST Suvidha Providers (GSP): 

  • API assists in elimination of data entry errors from e-invoices. 

  • API avoids double-entry of an e-invoice, as it prohibits entering the recorded data again in ERP and thereafter API transfers data to IRP Portal and E-way bill Portal. 

  • API provides a hassle-free merge between the ERP of the taxpayer and the e-invoice system 

  • The taxpayer can record the Acknowledgement and Invoice Reference Number of e-Invoice registration at GST System online

Documents Required 

  • Four Indian Public Static IPs (maximum) for whitelisting at NIC end. 

  • The summary test report of the successful test on the sandbox. 

  • Contact details of Technical SPOC & Project Manager (to be provided in the above report) 

Why choose eAuditor for APIs Integration for GST E-invoicing  

eAuditor for generation of GST E-invoice is the best API selection, as we provide an automated, integrated, and seamless e-invoicing software system. It is a one-stop e-invoicing solution that maintains the confidentiality of data, generation of industry-specific, professional & elegant-looking e-invoices without any disruption to your business. Our professional team is always 100% compliant with the rules and regulations of GST. 

We are the best choice of API integration for the Generation of e-invoice for your Business as we provide: 


Author : Naman

Date     : 29-Jun-2022

Frequently Asked Questions

Yes, the same token can be used for the generation of an e-invoice, if it is generated before the expiry of the token.

The token will be available for up to six hours on the production system.

A taxpayer can use ‘Force Refresh Access Token’ to generate a new token just 10 minutes before the expiry of the earlier token to avoid failure of a transaction after the expiry of such token.

After logging into the testing portal taxpayer can get access to the Public Key of the e-invoice system.