> For the complete documentation index, see [llms.txt](https://docs.cleartax.in/cleartax-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.cleartax.in/cleartax-docs/e-invoicing-gsp-api/getting-started-with-einv-gsp-api.md).

# Getting Started with EINV GSP API

This document describes the steps to integrate with ClearTax GSP for E-Invoicing.

## Integration Steps

**1. Create a sandbox account** - For testing, it is recommended to always use the sandbox environment. For host, SSL and more information on the sandbox environment, [click here](/cleartax-docs/e-invoicing-gsp-api/e-invoicing-gsp-api-reference.md#sandbox-environment).

**2. Complete sandbox testing** - Test all the APIs on the sandbox environment. For more information on the API documentation, [click here](/cleartax-docs/e-invoicing-gsp-api/e-invoicing-gsp-api-reference.md#api-documentation).

**3. Create a production account** - Once the testing is successful, create a ClearTax production account. For host, SSL and more information on the production environment, [click here](/cleartax-docs/e-invoicing-gsp-api/e-invoicing-gsp-api-reference.md#production-environment).

**4. Register GSP in NIC** - Before making any changes to production, you need to register ClearTax as GSP in NIC. [Check how to register](/cleartax-docs/e-invoicing-gsp-api/getting-started-with-einv-gsp-api/how-to-register-einv-gsp-on-irp.md). Note the username and password created at this step. You will need them later when using the Authentication API.

**5. Go live**!

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Have more queries? Write to <integrations-support@cleartax.in>
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