> For the complete documentation index, see [llms.txt](https://doc.borderlesspaymentng.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.borderlesspaymentng.com/authentication.md).

# Authentication

- [Intro](https://doc.borderlesspaymentng.com/authentication/intro.md): Authorization Header should be in the following format: Authorization: Bearer token
- [Token](https://doc.borderlesspaymentng.com/authentication/token.md): Authentication SECRET KEY is the major step you can start before you make any request, without SECRET KEY you can't make any request. Please don't share SECRET KEY with anyone.