funciona

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[])
{

   NSString *twitterUrl = @"http://54.207.80.28/api-lebox/versiones";
   // NSString *resp = [self makeRestAPICall: twitterUrl];
     NSURLRequest *Request = [NSURLRequest requestWithURL:[NSURL URLWithString: twitterUrl]];
    NSURLResponse *resp = nil;
    NSError *error = nil;
    NSData *response = [NSURLConnection sendSynchronousRequest: Request returningResponse: &resp error: &error];
    NSString *responseString = [[NSString alloc] initWithData:response encoding:NSUTF8StringEncoding];
    NSLog(@"%@",responseString);
    return 0;
}