PayPal error 580001 HTTP Request from iOS -

having difficulties in implementing adaptive payments in ios , unfortunately there little documentation on paypal's website or response. code:

- (void)makepaymentsandbox{      nserror *error;      //nsurlsessionconfiguration *configuration = [nsurlsessionconfiguration defaultsessionconfiguration];     //nsurlsession *session = [nsurlsession sessionwithconfiguration:configuration delegate:self delegatequeue:nil];      nsurl *url = [nsurl urlwithstring:@"https://svcs.sandbox.paypal.com/adaptivepayments/pay"];      nsmutableurlrequest *request = [nsmutableurlrequest requestwithurl:url                                                            cachepolicy:nsurlrequestuseprotocolcachepolicy                                                        timeoutinterval:30.0];      //setting     [request sethttpmethod:@"post"];      //headers     [request addvalue:@"alex.rietmann-facilitator_api1.fastwebnet.it" forhttpheaderfield:@"x-paypal-security-userid"];     [request addvalue:@"fw79ezxpfp69ne8x" forhttpheaderfield:@"x-paypal-security-password"];     [request addvalue:@"absua9nnv9nnkon4mwvt15ydgetajhcyzqohjklbum-bgroi7wrs" forhttpheaderfield:@"x-paypal-security-signature"];     //nv     [request addvalue:@"json" forhttpheaderfield:@"x-paypal-request-data-format"];     [request addvalue:@"json" forhttpheaderfield:@"x-paypal-response-data-format"];      [request addvalue:@"app-80w284485p519543t" forhttpheaderfield:@"x-paypal-application-id"];      [request addvalue:@"application/json" forhttpheaderfield:@"content-type"];     [request addvalue:@"en_us" forhttpheaderfield:@"accept-language"];       //data      /*nsstring *userupdate =[nsstring stringwithformat:@"clientdetails.applicationid=%@&actiontype=%@",@"app-80w284485p519543t", @"pay",nil];     nsdata *data1 = [userupdate datausingencoding:nsutf8stringencoding];     [request sethttpbody:data1];     [request setvalue: [nsstring stringwithformat:@"%lu", (unsigned long)[data1 length]] forhttpheaderfield:@"content-length"];*/       nsdictionary *mapdata = [[nsdictionary alloc] initwithobjectsandkeys:                               @"pay", @"actiontype",                               @"usd", @"currencycode",                               @"http:\\www.cleverlyapp.com", @"cancelurl",                              @"http:\\www.cleverlyapp.com", @"returnurl",                                @"returnall", @"requestenvelope.detaillevel",                              @"en_us", @"requestenvelope.errorlanguage",                                @"seneder@email.com", @"senderemail",                               @"0.1", @"receiverlist.receiver(0).amount",                              @"a-buyer@fastwebnet.it", @"receiverlist.receiver(0).email",                               @"0.1", @"receiverlist.receiver(1).amount",                              @"a-facilitator@fastwebnet.it", @"receiverlist.receiver(1).email",                                @"app-80w284485p519543t", @"clientdetails.applicationid",                                nil];     nsdata *postdata = [nsjsonserialization datawithjsonobject:mapdata options:0 error:&error];     [request sethttpbody:postdata];       [nsurlconnection connectionwithrequest:request delegate:self]; } 

here's response:

string: {     error =     (                 {             category = application;             domain = platform;             errorid = 580001;             message = "invalid request: {0}";             severity = error;             subdomain = application;         }     );     responseenvelope =     {         ack = failure;         build = 17325060;         correlationid = e82ede718b929;         timestamp = "2015-07-14t09:50:06.222-07:00";     }; } 

check these please:

1. adaptive payments pay api error 580001
2. 580001 invalid request: {0} paypal (php)
3. error 580001

some have encoding, set json, actualy sent url-encoded, etc, others have currency , currency format used (e.g values sent should not include currency sign etc..)