The format to look up UPC codes using this web service is <br />&lt;xml&gt;&lt;upc&gt;xxxxxxxxxxxx&lt;/upc&gt;&lt;/xml&gt; <br/>where xxxxxxxxxxxx is the UPC code The format to look up UPC codes using this web service is <br />&lt;xml&gt;&lt;upc&gt;xxxxxxxxxxxx&lt;/upc&gt;&lt;/xml&gt; <br/>where xxxxxxxxxxxx is the UPC code The format to look up UPC codes using this web service is <br />&lt;xml&gt;&lt;upc&gt;xxxxxxxxxxxx&lt;/upc&gt;&lt;/xml&gt; <br/>where xxxxxxxxxxxx is the UPC code