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E-Invoice & E-WayBills

Introduction

This section outlines the JSON-based APIs provided by Octa to help you automate your e-invoicing workflows, including the generation, retrieval, and cancellation of e-invoices & e-waybills.

Abbreviations & References

TermDescription
IRNInvoice Reference Number
IRPInvoice Registration Portal
Base64 encodingMethod of encoding binary data in printable string
Base64 URL encodingMethod of encoding binary data in printable string using URL safe characters
e-Invoice Sandbox (NIC)NIC portal of e-invoice application development

Configuration

Before using the e-invoice and e-waybill APIs, you must complete a one-time account configuration:

  1. Generate API credentials from the NIC e-Invoice Portal.
  2. Configure these credentials in your Octa account.

Once this setup is complete, you can begin using Octa’s e-invoicing and e-waybill APIs.

Keep your NIC API credentials secure. These credentials are directly linked to your GSTIN, and any misuse could impact your compliance obligations.

Step-1: Create API users on Govt e-Invoice Portal

OTP Required: Govt e-Invoice Portal will send an OTP to the registered mobile number. This OTP is required to generate the API username/password. You will get the OTP on the mobile number which is registered on Govt GST Portal.

  • Login to Govt e-invoice portal
  • Goto API Registration → User Credentials → Create API User. System will send an OTP to registered mobile number. Enter the OTP to continue.
  • Select the option Through GSP
  • Select GSP: Alankit Limited
  • Select the API username and password
  • Click Submit
  • Repeat the process for Chartered Information Systems Pvt Ltd GSP also.

Service Availability: We are configuring two API users so that even if one GSP is down, e-invoice services can continue without any interruptions.

Step-2: Configure API users in Octa

  • Login to Octa GST. If you don't have an account, please contact us for your account creation.
  • Open the company/GSTIN you want to use for e-invoicing/e-waybills. If the company is not available in Octa, you can add it on the Home page. Simply click on the Add Company button, enter your GSTIN and create the company.
  • Click on the Settings button in the left bar (in the bottom left corner).
  • In the GSTIN Settings section:
    • Click on the E-Invoice Configuration button and enter the company details.
    • Click on the E-Invoice Credentials button and add the API credentials you generated on Govt E-Invoice Portal (generated in Step-1).