> For the complete documentation index, see [llms.txt](https://adidas.gitbook.io/api-guidelines/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://adidas.gitbook.io/api-guidelines/rest-api-guidelines/protocol/tls.md).

# TLS

Every API **MUST** require secure connections with **TLS 1.2**. That is, an API using the HTTP protocol **MUST** use **HTTPS**.

Any non-TLS requests **SHOULD** be ignored. In **HTTP** environments where this is not possible, a non-TLS request **SHOULD** result in the **403 Forbidden** response.