c# - Ebay API GetCategorySpecifics Error 500 -


after checking many different options, think it's time ask questions experts :).

i'm trying make ebay api service call using getcategoryspecifics call, keep getting following error message:

the remote server returned error: (500) internal server error.

here's code

//create xml file public string createebayxmlfile()  {          string _ebayfeaturens = "urn:ebay:apis:eblbasecomponents";         string resultxml = "";         xdocument doc = new xdocument         (             new xdeclaration("1.0", "utf-8", ""),             new xelement(_ebayfeaturens + "getcategoryspecifics",             new xelement(_ebayfeaturens + "categoryspecific", true),             new xelement(_ebayfeaturens + "categoryid", "categoryid"),             new xelement(_ebayfeaturens + "featureid", "itemspecificsenabled"),             new xelement(_ebayfeaturens + "viewallnodes", true),             new xelement(_ebayfeaturens + "detaillevel", "returnall"),             new xelement(_ebayfeaturens + "categoryspecificsfileinfo", "true"),             new xelement(_ebayfeaturens + "excluderelationships", "false"),             new xelement(_ebayfeaturens + "includeconfidence", "true"),             new xelement(_ebayfeaturens + "maxnames"),             new xelement(_ebayfeaturens + "outputselector", "unitpriceinfo")             )        );     resultxml = doc.tostring();     return resultxml;  }    //make service call    public xmldocument maketheservicecall()     {        string localebayxml = createebayxmlfile();        string _ebaysvcurl = http://svcs.ebay.com/services/search/findingservice/v1;        //authentication , service call        byte[] xml_bytes = encoding.utf8.getbytes(localebayreqxml);                 httpwebrequest req = (httpwebrequest)system.net.webrequest.create(_ebaysvcurl) httpwebrequest;                 req.headers.add("x-ebay-soa-security-appname", myappid);                 req.headers.add("x-ebay-soa-operation-name", "getcategoryspecifics");                 req.headers.add("x-ebay-soa-service-version", "1.0.0");                 req.headers.add("x-ebay-soa-global-id", "ebay-us");                 req.method = "post";                 req.contentlength = xml_bytes.length;                 req.contenttype = "text/xml";                  using (var requeststream = req.getrequeststream())                 {                     requeststream.write(xml_bytes, 0, xml_bytes.length);                 }                  xmldocument xmldoc = new xmldocument();                  using (httpwebresponse response = (httpwebresponse)req.getresponse())                 {                     {                         xmldoc.load(response.getresponsestream());                     }                 }      }

i received error message on httpwebresponse declaration. never reaches xmldoc.load(response.getresponsestream());

please help!

i changed url https://api.ebay.com/ws/api.dll , problem resolved. instead of:

   string _ebaysvcurl = http://svcs.ebay.com/services/search/findingservice/v1;

it's 

   string _ebaysvcurl = http://svcs.ebay.com/merchandisingservice

the former 1 work services findcompleteditems, finditemsbykeywords , on.

for list of other url , when use them, see link below:

https://ebaydts.com/ebaykbdetails?kbid=429


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