Basic Authentication
Perhaps the most familiar authentication option, basic auth (as it is often called) requires an Agent to provide a username and password for a request. This is most common with custom integrations.
Custom Headers
This form of authentication provides an option for additional information. For example, this can be set up to use when specific information is needed in addition to defaults, particularly with troubleshooting.
Request Signing
This process can be more complex, so we have dedicated an in-depth section to it here.