> For the complete documentation index, see [llms.txt](https://docs.mastersindia.co/einvoicing/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.mastersindia.co/einvoicing/authentication/api-key.md).

# API KEY

This page showcases how you can use API Key as an authentication mechanism

Another solution that we provide is the **API key** approach. This API Key can be generated by logging to the UI and going to **profile settings > API Keys**

<figure><img src="https://4183504618-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FL9OtGhx4g7pnpWuy1Q8A%2Fuploads%2Fnvgwmrgd4s9soYaS9l1n%2Fapi_key.png?alt=media&amp;token=5ad34644-5405-4b6c-bb6d-cd9a49414ae3" alt=""><figcaption></figcaption></figure>

Under API you will find the option to generate **API Key,** click on generate and you have the API key available.  This is a permanent key which can be re-generated or deactivated as per user preference.