We are looking into this issue.
we are looking into your error messages and needs the raw request (the one that includes all HTTP headers), you can access it by clicking ‘RAW’ tab in SOAPUI).
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the error above happens when if we send a request using an empty x-pay-token header parameter.
The tokenize card api doesn´t require a x-pay-token parameter so we have removed the parameter from the header, however now we have an access denied error (403) , as requested we are sending in attach the soap-ui raw data