Below you will find a listing of the supported Authorize.net-compatible parameters and what information each parameter should contain. This parameter set is used by third party carts and custom designed scripts. Please note that 2Checkout must know what is being sold in every sale. There are parameters available that allow for dynamic product creation. These will be discussed as well, and must be used if you are using this parameter set, but they are not Authorize.Net specific.

Multi-page Payment Routine:
https://www.2checkout.com/2co/buyer/purchase
Supports all payment methods. Supports tangible and intangible products/services.

Single Page Payment Routine:
https://www.2checkout.com/checkout/spurchase
Credit card-only payment routine only available for intangible products/services.

Required Parameters:
x_login - Your numerical 2checkout vendor account number.
x_amount - The total amount to be billed, without a currency symbol, and only two decimal places if used (8 characters, decimal, 2 characters: Example: 99999999.99)
x_invoice_num - A unique order id from your system. (64 characters max)

Product Identification Parameters:
Suppliers using this parameter set must pass in parameters to identify what is being sold during the purchase. These parameters will also benefit suppliers as when used correctly the product information will be displayed to customers on the purchase pages and will be listed on the suppliers 2Checkout.com sale detail page.

id_type - Due to changes in with the Product Identification parameters this parameter should be passed in once during the purchase and will need to have its value set to 1.
c_prod - The ID of the product that is being purchased. The quantity of product being purchased can passed with this parameter by placing a comma after the ID and then the quantity in numeric format.
c_name - The value of this parameter should contain the name of the product to be created. (128 characters max)
c_description - The value of this parameter should contain a short description of the product to be sold. (255 characters max)
c_price - The price of your product. Please note that in order to prevent a discrepancy between the total parameter and the sum of the product identification c_price parameters which may confuse the customer, the product price will not be displayed on the purchase page. (8 characters, decimal, 2 characters: Example: 99999999.99)

You can use these identification parameters to pass in multiple products as well. To do so you will need to append a digit to each parameter. For example, c_prod_1, c_name_1, c_description_1, c_price_1 will describe the first product, then to describe the second product you would use a 2 so the parameters will read c_prod_2, c_name_2 and so on.

Additional Parameters:
demo - Y to enable demo mode. Do not pass this in for live sales. Can also be controlled within the account.
lang - “sp” for Spanish purchase routine pages, defaults to English if this is absent, but “en” may be used for English as
well.
merchant_order_id - Specify your order number with this parameter. It will also be included in the confirmation emails to yourself and the customer. (50 characters max)
pay_method - CC for Credit Card, CK for check, PPI for PayPal, PPL for PayPal Pay Later, or FXS for FXSource. This will set the default selection on the payment method step during the checkout process.
skip_landing - If set to 1 it will skip the order review page of the purchase routine.
x_Receipt_Link_URL - Used to specify an approved URL on-the-fly, but is limited to the same domain that is used for your 2Checkout account, otherwise it will fail. This parameter will over-ride any URL set on the Look and Feel page. (no limit)

To populate the billing information page you may pass in:
x_First_Name - buyers first name (64 characters max)
x_Last_Name - buyers last name (64 characters max)
x_Phone - buyers phone number (16 characters max)
x_Email - buyers email address (64 characters max)
x_Address - buyers address (64 characters max)
x_City - buyers city (64 characters max)
x_State - buyers state (64 characters max)
x_Zip - buyers zip code (16 characters max)
x_Country - buyers country (64 characters max)

To populate the shipping information page you may pass in:
x_Ship_To_First_Name
x_Ship_To_Last_Name
x_Ship_To_Address
x_Ship_To_City
x_Ship_To_Country
x_Ship_To_State
x_Ship_To_Zip

Please note that since this parameter set is for third party shopping carts, we do not collect shipping information for these types of orders. This is because your cart is responsible for calculating the shipping and it is passed in as part of the x_amount parameter. We will present the shipping information page if any of the shipping parameters are passed in, but this does not mean we will apply shipping charges to the order. If the shipping information is passed in, we will also populate the billing information using that information unless any of the above parameters are passed in by your cart to populate the billing information page.

It is also important to note that when using the Authorize.Net set of parameters, 2CO only requires the three listed under the required section. We will therefore not passback strictly Authorize.Net style parameters for everything unless they are passed in to us. This is not often a problem as most carts do this anyways. For example, x_First_Name and x_Last_Name will prepopulate the billing name, but 2CO uses cardholder_name for this. cardhold_name will then be returned unless x_First_Name and x_Last_Name are passed into 2Checkout.

Custom Parameters:
You may pass in any additional parameters that you may need and they will be returned to you at the end of the sale. The only restrictions on custom parameters are that they can not share the name of ANY parameter that our system uses, even from the other sets. Please note that you WILL need a return script set up on the Look and Feel page to receive any of these parameters back as they are not included in the confirmation emails.

Return Parameters:
You can receive back all of the parameters that were passed in as well as the following parameters:
x_2checked - Y if card was successfully processed, K if pending.
x_MD5_Hash - The MD5 hash that can be used to verify that the sale came from a 2CO server.
x_trans_id - the 2CO order number for the order.

Using this parameter set, we are not receiving any product information. As you can see, you are only passing in a total amount to us. Usually, the cart will have some means of using the x_invoice_num to determine what was purchased after the sale. A return URL will need to be set up on the Look and Feel page for the cart to correctly determine this.

Consult the documentation that came with your cart or contact the cart manufacturer for assistance with setting this up or to determine what URL you should enter on the Look and Feel page for your cart to receive the product information.

Recurring billing can not be done with this parameter set. You must use the Plug-N-Play parameter set and have the products defined within the 2CO database for recurring billing.

Important: You can not mix the three parameter sets. This will cause problems during payment or may prevent the payment pages from working at all.

Important Note: When you are testing parameters, please be certain to clear the cookies in your browser between tests to ensure the changes you have made are applied. For more information on clearing the cookies please click here.

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