> For the complete documentation index, see [llms.txt](https://sec-connect-api-docs.securitize.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sec-connect-api-docs.securitize.io/authentication-1.md).

# OAuth 2.0

- [Authentication](https://sec-connect-api-docs.securitize.io/authentication-1/authentication.md): The authentication process describe how to add a link to your website to Securitize D and how to retrieve the information provided after the login process and use it on Connect API
- [Access Token](https://sec-connect-api-docs.securitize.io/authentication-1/access-token.md): How to get the Access Token after the login process and how to use it
- [Refresh Access Token](https://sec-connect-api-docs.securitize.io/authentication-1/refresh-access-token.md): How to refresh the Access Token
- [Application Configuration](https://sec-connect-api-docs.securitize.io/authentication-1/client-configuration.md): How to get Post Issuer information.