POST api/HummingBirdAPI/InitiatePayment

{
  "tid": "sample string 1",
  "merchant_id": "sample string 2",
  "order_id": "sample string 3",
  "amount": "sample string 4",
  "currency": "sample string 5",
  "redirect_url": "sample string 6",
  "cancel_url": "sample string 7",
  "billing_name": "sample string 8",
  "billing_address": "sample string 9",
  "billing_city": "sample string 10",
  "billing_state": "sample string 11",
  "billing_zip": "sample string 12",
  "billing_country": "sample string 13",
  "billing_tel": "sample string 14",
  "billing_email": "sample string 15",
  "delivery_name": "sample string 16",
  "delivery_address": "sample string 17",
  "delivery_city": "sample string 18",
  "delivery_state": "sample string 19",
  "delivery_zip": "sample string 20",
  "delivery_country": "sample string 21",
  "delivery_tel": "sample string 22",
  "merchant_param1": "sample string 23",
  "merchant_param2": "sample string 24",
  "merchant_param3": "sample string 25",
  "merchant_param4": "sample string 26",
  "merchant_param5": "sample string 27",
  "promo_code": "sample string 28",
  "customer_identifier": "sample string 29"
}

<InitiatePayment xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/HummingBirdWebsite.Models">
  <amount>sample string 4</amount>
  <billing_address>sample string 9</billing_address>
  <billing_city>sample string 10</billing_city>
  <billing_country>sample string 13</billing_country>
  <billing_email>sample string 15</billing_email>
  <billing_name>sample string 8</billing_name>
  <billing_state>sample string 11</billing_state>
  <billing_tel>sample string 14</billing_tel>
  <billing_zip>sample string 12</billing_zip>
  <cancel_url>sample string 7</cancel_url>
  <currency>sample string 5</currency>
  <customer_identifier>sample string 29</customer_identifier>
  <delivery_address>sample string 17</delivery_address>
  <delivery_city>sample string 18</delivery_city>
  <delivery_country>sample string 21</delivery_country>
  <delivery_name>sample string 16</delivery_name>
  <delivery_state>sample string 19</delivery_state>
  <delivery_tel>sample string 22</delivery_tel>
  <delivery_zip>sample string 20</delivery_zip>
  <merchant_id>sample string 2</merchant_id>
  <merchant_param1>sample string 23</merchant_param1>
  <merchant_param2>sample string 24</merchant_param2>
  <merchant_param3>sample string 25</merchant_param3>
  <merchant_param4>sample string 26</merchant_param4>
  <merchant_param5>sample string 27</merchant_param5>
  <order_id>sample string 3</order_id>
  <promo_code>sample string 28</promo_code>
  <redirect_url>sample string 6</redirect_url>
  <tid>sample string 1</tid>
</InitiatePayment>

Sample not available.