> For the complete documentation index, see [llms.txt](https://docs.digitalriver.com/commerce-api-references/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.digitalriver.com/commerce-api-references/commerce-api-reference-guide/api-structure/supported-protocols-and-formats.md).

# Supported protocols and formats

## Data transport protocols

Digital River supports the following data transport protocols:

* **Email**–As attachments or within the body.
* **S/FTP (Secure/File Transfer Protocol)**. You can place files on Digital River servers for retrieval or push them to external servers.
* **HTTP/HTTPS (Hypertext Transport Protocol/Hypertext Transport Protocol Secure)**–Supports server-side and Client Certificates.

## XML

Digital River supports the XML (Extensible Markup Language) format.

## Encryption

Digital River supports the following encryption types:

* PGP (Pretty Good Privacy)
* AES (Advanced Encryption Standard)

## GMT

Digital River provides all dates and times in Greenwich Mean Time (GMT) format.