GSP Solution - GST APIs For Developers Signup

A Licensed GST Suvidha Provider - APIs enable automatically

Welcome to MasterGST ( A Licensed GST Suvidha Provider ) - GST API Developers community and this portal intended and specifications are related to GST APIs. This GST API portal will also host Playful GST API (REST API) and sandbox information and MasterGST GST API Portal will be a one stop shop for developer's, who wanted to build innovative application for GST Returns & Filing Software , GST Accounting Software Tax payers, GST API Integration with ERP's and Third party Software Integration. Please signup to get your own GST API Sandbox / GST API Testing keys.

MasterGST - GST API Sandbox Information :
Note : Please Enter below MasterGST - GST API Sandbox details ( Email Id, User Client Id, User Client Secret ) for get Response Messages.
Email id :
Client id : 385b9557-1e80-4730-9c4f-82a2257e025c
Client secret : f9abfd20-2ffb-4d49-9cc4-94d995af58db
How to Start:
  1. Create GSTN Sandbox Account (Please select GSP as "Tera Software Limited" ) - Click here
  2. Sign-up with MasterGST - Sign up
  3. Login -> Credentials -> Create Credentials
  4. Once you receive the Sandbox Details from GSTN, start using GSTN Username & GSTN Number along with MasterGST API Credentials
  5. GST API Support Forum : Click here
  6. For Payload, Please click here GSTN API Documentation.

Base URL :

For Payload, Please click here GSTN API Documenation And click here to download Return Filing Process Through API,

Click here to download Error Codes


Error Codes : Click here

Additional Help : Please follow us on GSP/ASP Google Group

To Create GSTN Sandbox Account click here

IMPORTANT NOTICE: These are initial versions of GST APIs and are subject to change as GSTN system is still evolving and still in implementation phase. GST API Developer Community will be informed about such changes through announcements through our portal and notifications.