> 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.md).

# (Deprecated) GST 1.0 API

- [(Deprecated) Introduction to GST API](https://docs.cleartax.in/cleartax-docs/gst-api-1/introduction-to-gst-api.md)
- [(Deprecated) Learn GST API Basics](https://docs.cleartax.in/cleartax-docs/gst-api-1/learn-basics.md)
- [(Deprecated) Getting Started with GST API](https://docs.cleartax.in/cleartax-docs/gst-api-1/getting-started-with-gst-api.md)
- [(Deprecated) How to set up ClearTax account?](https://docs.cleartax.in/cleartax-docs/gst-api-1/getting-started-with-gst-api/set-up-your-account.md)
- [(Deprecated) How to authenticate API requests?](https://docs.cleartax.in/cleartax-docs/gst-api-1/getting-started-with-gst-api/how-to-authenticate-api-requests.md)
- [(Deprecated) How to upload an invoice from File?](https://docs.cleartax.in/cleartax-docs/gst-api-1/getting-started-with-gst-api/upload-an-invoice-from-file.md)
- [(Deprecated) How to create custom import template?](https://docs.cleartax.in/cleartax-docs/gst-api-1/getting-started-with-gst-api/how-to-create-custom-import-template.md)
- [(Deprecated) GST 1.0 API Reference](https://docs.cleartax.in/cleartax-docs/gst-api-1/gst-api-reference.md)
- [Taxpayer Information](https://docs.cleartax.in/cleartax-docs/gst-api-1/gst-api-reference/taxpayer-information.md)
- [(Deprecated) Invoices](https://docs.cleartax.in/cleartax-docs/gst-api-1/gst-api-reference/invoices.md)
- [(Deprecated) Bills of Supply](https://docs.cleartax.in/cleartax-docs/gst-api-1/gst-api-reference/bills-of-supply.md)
- [(Deprecated) Credit Debit Notes (CDN)](https://docs.cleartax.in/cleartax-docs/gst-api-1/gst-api-reference/credit-debit-notes.md)
- [(Deprecated) Advances](https://docs.cleartax.in/cleartax-docs/gst-api-1/gst-api-reference/advances.md)
- [(Deprecated) Resources and Masters](https://docs.cleartax.in/cleartax-docs/gst-api-1/gst-api-reference/resources-and-masters.md)
- [(Deprecated) How to read GST error response](https://docs.cleartax.in/cleartax-docs/gst-api-1/gst-api-reference/resources-and-masters/error-response-master.md)
- [(Deprecated) Unit of Measurement master](https://docs.cleartax.in/cleartax-docs/gst-api-1/gst-api-reference/resources-and-masters/unit-of-measurement-master.md)
- [(Deprecated) State master](https://docs.cleartax.in/cleartax-docs/gst-api-1/gst-api-reference/resources-and-masters/place-is-supply-master.md)
- [(Deprecated) Document Classification/Section Name master](https://docs.cleartax.in/cleartax-docs/gst-api-1/gst-api-reference/resources-and-masters/classification-section-name-master.md)
- [(Deprecated) Items](https://docs.cleartax.in/cleartax-docs/gst-api-1/gst-api-reference/items.md)
- [(Deprecated) Contacts](https://docs.cleartax.in/cleartax-docs/gst-api-1/gst-api-reference/contacts.md)
- [(Deprecated) GST File Upload API Reference](https://docs.cleartax.in/cleartax-docs/gst-api-1/gst-api-reference/file-upload-api-reference.md)