> ## Documentation Index
> Fetch the complete documentation index at: https://docs.niobi.co/llms.txt
> Use this file to discover all available pages before exploring further.

# Authentication Errors

> This section describes a list of errors related to security credentials while accessing the api endpoints.

| Error Code | Error Message                                                                                                             | Action Required                                                                                                                                     |
| ---------- | ------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------- |
| 403        | [You are restricted to access the site. Contact to Niobi support for further information.](/errors/403/restricted-access) | Your ip addresss is not yet whitelisted with us. Contact us with a list of your ips for whitelisting at [support@niobi.co](mailto:support@niobi.co) |
| 403        | [Request was not verified](/errors/403/request-not-verified)                                                              | Make sure you are using the correct payload and signature which were previously signed                                                              |