https://itunesconnect.apple.com/WebObjects/iTunesConnect.woa/ra/apps/create/?appType=ios
The below listed data is sent via a POST request. You'll have to make sure the format you're using is correct and provides all needed information.
{
"versionString": {
"value": "1.0"
},
"newApp": {
"bundleId": {
"value": "com.krausefx.app"
},
"vendorId": {
"value": "[SKU Number]"
},
"appType": "iOS App",
"name": {
"value": "[Your App Nmae]"
},
"primaryLanguage": {
"value": "English_Australian"
}
}
}