AWS Documentation » Amazon Simple Pay » Advanced Guide » Working with Amazon Simple Pay Buttons » Amazon Simple Pay Button Input Reference » Marketplace Payment Button Input Reference	« Previous Next »
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Marketplace Payment Button Input Reference

The input parameters are a mix of required parameters, as listed in the following table.

Parameter	Description	Required
`abandonUrl`	Optionally enter the URL where senders should be redirected if they cancel their transaction	No
`accessKey`	Your AWS Access Key	Yes
`amount`	Enter the amount you want to collect for the item	Yes
`cobrandingStyle`	Optionally, set to a cobranding style. Valid values are "logo" or "banner". ("logo" is preferred)	No
`collectShippingAddress`	Optionally set to `1` if you want Amazon Payments to return the buyer's shipping address as part of the transaction information	No
`description`	Enter a description of the item	Yes
`fixedMarketplaceFee`	If you assess a fixed charge per transaction, set `fixedMarketplaceFee` to that value. You may have a value in both this parameter and `variableMarketplaceFee`, and you must have a value for at least one of them.	No
`immediateReturn`	Optionally set to `1` to skip the final status page in Amazon Payments. Default is `0`.	No
`ipnUrl`	Optionally type the URL of your host page to which Amazon Payments should send the IPN transaction information	No
`processImmediate`	Optionally set to `1` to settle the transaction, otherwise set `processImmediate` to `0`. Default value is `1`	No
`recipientEmail`	The email address of the seller	Yes
`referenceId`	Optionally provide a unique identifies of this transaction for your records.	No
`returnUrl`	Optionally enter the URL where buyers should be redirected after they complete the transaction	No
`secretKey`	Your AWS secret key	Yes
`signature`	A value calculated using the form parameters.	Yes
`signatureMethod`	The signing algorithm, either `HmacSHA1` or `HmacSHA256`.	Yes
`signatureVersion`	A value that specifies the signature format. Currently, the only valid value is `2`.	Yes
`variableMarketplaceFee`	If you assess a percentage charge per transaction, set `variableMarketplaceFee` to that value. You may have a value in both this parameter and `fixedMarketplaceFee`, and you must have a value for at least one of them.	No

For information on using the Amazon Simple Pay to create buttons, see Understanding the Amazon Simple Pay Button Samples.

Marketplace Payment Button Well-Formed HTML

Example HTML for a marketplace button, signed using the signature version 2 method.

<form 
     action="https://authorize.payments.amazon.com/pba/paypipeline" 
     method="POST">
     <input type="hidden" name="immediateReturn"
         value="1" >
     <input type="hidden" name="collectShippingAddress"
         value="1" >
     <input type="hidden" name="accessKey"
         value="YourAccessKeyId" >
     <input type="hidden" name="referenceId"
        value="MyTransaction-001" >
     <input type="hidden" name="recipientEmail"
         value="email domain.com" >
     <input type="hidden" name="amount"
         value="USD 10" >
     <input type="hidden" name="variableMarketplaceFee"
         value="4" >
     <input type="hidden" name="signature"
         value="dXZgCQ8fLsPjNkbHswghORXd34tTVZWEjyetpzYG1ok=" >
     <input type="hidden" name="fixedMarketplaceFee"
         value="USD 0.20" >
     <input type="hidden" name="description"
         value="Pay for Purple Vase (Walter store)" >
     <input type="hidden" name="ipnUrl"
         value="http://yourwebsite.com/instantpaymentnotification" >
     <input type="hidden" name="returnUrl"
         value="http://yourwebsite.com/success" >
     <input type="hidden" name="processImmediate"
         value="1" >
     <input type="hidden" name="cobrandingStyle"
         value="logo" >
     <input type="hidden" name="abandonUrl"
         value="http://yourwebsite.com/cancel" >
     <input type="image"
         src=
   "https://authorize.payments.amazon.com/pba/images/SMPayNowWithAmazon.png"
         border="0">
     <input type="hidden" name="signatureVersion"
         value="2" >
     <input type="hidden" name="signatureMethod"
         value="HmacSHA256" >
</form>

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