What are the external metadata service URLs used by MCEBuddy?

I’m using a VPN and I think it is interfering with MCEBuddy’s connecting to the metadata service URLs.
However, the logs don’t indicate the URLs that are failing, just that the connection or API to fetch the data failed.

INFORMATION> 2019-09-01T20:41:53 MCEBuddy.MetaData.VideoMetaData --> Checking TheTVDB
WARNING> --> Unable to connect to TVDB
Error -> System.Net.WebException: The remote server returned an error: (503) Server Unavailable.
   at System.Net.HttpWebRequest.GetResponse()
   at System.Xml.XmlDownloadManager.GetNonFileStream(Uri uri, ICredentials credentials, IWebProxy proxy, RequestCachePolicy cachePolicy)
   at System.Xml.XmlUrlResolver.GetEntity(Uri absoluteUri, String role, Type ofObjectToReturn)
   at System.Xml.XmlTextReaderImpl.OpenUrlDelegate(Object xmlResolver)
   at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
   at System.Threading.CompressedStack.Run(CompressedStack compressedStack, ContextCallback callback, Object state)
   at System.Xml.XmlTextReaderImpl.OpenUrl()
   at System.Xml.XmlTextReaderImpl.Read()
   at System.Xml.XPath.XPathDocument.LoadFromReader(XmlReader reader, XmlSpace space)
   at System.Xml.XPath.XPathDocument..ctor(String uri, XmlSpace space)
   at MCEBuddy.MetaData.TVDB.DownloadSeriesDetails(VideoTags videoTags, Boolean prioritizeMatchDate, Boolean overwrite, Log jobLog)
WARNING> 2019-09-01T20:43:14 MCEBuddy.MetaData.VideoMetaData --> TheTVDB failed
INFORMATION> 2019-09-01T20:43:14 MCEBuddy.MetaData.VideoMetaData --> Checking TV.com
WARNING> 2019-09-01T20:43:15 MCEBuddy.MetaData.VideoMetaData --> TV.com failed
INFORMATION> 2019-09-01T20:43:15 MCEBuddy.MetaData.VideoMetaData --> Checking TMDB
WARNING> 2019-09-01T20:43:27 MCEBuddy.MetaData.VideoMetaData --> TMDB failed
INFORMATION> 2019-09-01T20:43:27 MCEBuddy.MetaData.VideoMetaData --> Checking IMDB
WARNING> --> Error parsing IMDB Show response
Error -> System.NullReferenceException: Object reference not set to an instance of an object.
   at MCEBuddy.MetaData.IMDB.searchShowTitle(String title, Nullable`1 releaseDate, ShowType matchType, Boolean firstMatchOnly, Boolean searchAKAs, Log jobLog)
WARNING> --> Unable to get match from IMDB
WARNING> 2019-09-01T20:43:29 MCEBuddy.MetaData.VideoMetaData --> IMDBApi failed

Can you post or point me to where can I find the URLs in the config files so that I can exclude/whitelist them in my VPN?