OK so this is what the /metadata shows:
{"Usage":"append '?debug=requestinfo' to any querystring. Optional params: virtualPathCount","Host":"_v5.41_Web API","HostType":"SelfHost (AppSelfHostBase)","StartedAt":"2018-11-02 13:56:55","Date":"2018-11-02 14:21:00","ServiceName":"Web API","UserHostAddress":"10.200.19.25","HttpMethod":"GET","PathInfo":"/metadata","OriginalPathInfo":"/metadata","StripApplicationVirtualPath":false,"GetPathUrl":"http://mydomain.com:36380/metadata", "AbsoluteUri":"http://mydomain.com:36380/metadata?debug=requestinfo","WebHostUrl":"https://mydomain.com:4430/api/","ApplicationBaseUrl":"https://mydomain.com:4430/api/","ResolveAbsoluteUrl":"https://mydomain.com:4430/api/resolve","RootDirectoryPath":"C:\\WebAPIbin","CurrentDirectory":"C:\\Windows\\system32","RawUrl":"/metadata?debug=requestinfo","Status":0,"ContentLength":0, "Headers":{"Connection":"Keep-Alive","Accept":"text/html, application/xhtml+xml, image/jxr, */*","Accept-Encoding":"gzip,deflate","Accept-Language":"en-GB","Host":"mydomain.com:4430","User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36 Edge/16.16299"},"QueryString":{"debug":"requestinfo"}, "FormData":{},"AcceptTypes":["text/html","application/xhtml+xml","image/jxr","*/*"],"OperationName":"metadata","ResponseContentType":"text/html","RequestAttributes":"LocalSubnet, InSecure, HttpGet","Ipv4Addresses":"10.200.19.244/255.255.255.0, 127.0.0.1/255.0.0.0","Ipv6Addresses":"fe80::94b8:6040:a453:7b9e, ::1, fe80::5efe:10.200.19.244","DebugString":"", "PluginsLoaded":["HtmlFormat","CsvFormat","PredefinedRoutesFeature","MetadataFeature","NativeTypesFeature","HttpCacheFeature","RequestInfoFeature","SpanFormats","OpenApiFeature","CorsFeature","PostmanFeature","SoapFormat","RequestLogsFeature"],"StartUpErrors":[],"AsyncErrors":[],"Stats":{"RawHttpHandlers":"4","PreRequestFilters":"1","RequestBinders":"0", "GlobalRequestFilters":"1","GlobalRequestFiltersAsync":"0","GlobalResponseFilters":"1","GlobalResponseFiltersAsync":"1","CatchAllHandlers":"4","Plugins":"13","ViewEngines":"0","RequestTypes":"220","ResponseTypes":"184","ServiceTypes":"80","RestPaths":"220","ContentTypes":"8","EnableFeatures":"All","VirtualPathProvider": "[FileSystemVirtualFiles: C:\\WebAPIbin], [ResourceVirtualFiles: WebServices], [ResourceVirtualFiles: ServiceStack], [ResourceVirtualFiles: ServiceStack.Api.OpenApi]"},"VirtualPathProviderFiles":[]}