> 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/gst-api-1/getting-started-with-gst-api/how-to-authenticate-api-requests.md).

# (Deprecated) How to authenticate API requests?

Refer to the updated documentation at:

{% content-ref url="/pages/jKfLlaH3bQ3WfAPyoKPG" %}
[Generate Access Token API](/cleartax-docs/clear-finance-cloud/cfc-api-reference/generate-access-token-api.md)
{% endcontent-ref %}