I'm using V-11.7 and I have no problems using HttpClient in differents scenarios, GET, POST, uploading files, getting the responses, etc. But now I have to upload an XML to an public admnistracion URL's that requires a valid certificate. I have to use a P12 cert to connect to a webservice and I don't see the way. Alternativelly I'm using cURL to accomplish this using this command: lcComan = "C:\Teragest\FacE\curl.exe" + " -k" + " -H " + CHR(34) + "Content-type: application/xml;charset=UTF-8" + CHR(34) + " --data-binary @" + lcFiche + ".xml" + " -o " + lcFiche + "out.xml" + " -v" + " --key " + lcpemKey + " --cacert " + lcpemCacert + " --cert " + lcpemCert + ":" + lcpemPass + " " + lcUrl. OS-COMMAND VALUE(lcComan). I don't have to receive a binary, he response in this case is a simple XML. I tried to add header that reference the certificate but didnt work at all: oLib = ClientLibraryBuilder:Build():sslVerifyHost(NO):LIBRARY. /*ServerNameIndicator("pruebas- ticketbai.araba.eus"):SetSSLProtocols(cSSLProtocols):SetSSLCiphers(cSSLCiphers):library. */ oHttpClient = ClientBuilder:Build():UsingLibrary(oLib):Client. oRequest = RequestBuilderost(lcUrl,oDocument):AddHeader("Content-Type","application/xml;charset=UTF-8") :AddHeader("key", lcpemKey) :AddHeader("cacert", lcpemCacert) :AddHeader("--cert-type","P12") :AddHeader("--cert", cRuta + cNif + ".p12" + ":" + lcpemPass):Request. oResponse = ResponseBuilder:Build():Response. oHttpClient:Execute(oRequest, oResponse).` There is a method to do this with HttpClient? Thank you all! Continue reading...