Well I got past most of the hurdles using the CIM API and things are finally picking up steam.

One of the requirements is to authorize a transaction using the cc number and other details that are provided by the customer on our site. I am using the CP API (since I do not need to create a customer account for this)  Questions:

1. Do I need a CP account for this?

2. When I send the request over to AuthorizeNet the response has an error code 85 and the reason text is "The market type is invalid". This is my request string that I am sending over

x_login=myLogin&x_tran_key=myTransKey&x_amount=10.00&x_card_num=4111111111111111&x_test_request=True&x_cpversion=1.0&x_market_type=2&x_device_type=4&x_type=AUTH_CAPTURE&x_user_ref=1234&x_exp_date=1012

Am I missing anything here?

Thanks!