Use the XACML PDP SOAP Service
Assuming that the pdp is deployed on JBoss AS, the endpoint will something like: "http://localhost:8080/pdp/SOAPSAMLXACMLPDP" To this endpoint, you can send the SOAP calls.  SOAPSAMLXACML : this is a utility class available as part of PicketLink distribution, that you can use to create the SAML payload for the xacml authorization request. For usage, see below.