> For the complete documentation index, see [llms.txt](https://docs.erpbridge.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.erpbridge.io/security/3.-authentication-resources.md).

# 3. Authentication Resources

* OAuth authentication to ERP Bridge in on premise installer;
* OAuth authentication to HubSpot in ERP Bridge web application.