🏠APIprotoNamespacestemporalNamespacesapiNamespacescommonNamespacesv1NamespacesCallbackNamespacesNexusInterfaces$PropertiesOn this pageInterface: $Properties Properties of a Nexus. Extended by INexus Properties header? optional header?: {[k: string]: string; } | null Header to attach to callback request. url? optional url?: string | null Callback URL.