...
http://localhost:8080/pentaho/content/ws-run/metadataService/<method-name>
This forms a more generic and independent API as compared to http://wiki.pentaho.com/display/ServerDoc2x/BI+Server+Metadata+Services
http://localhost:8080/pentaho/content/ws-run/metadataService/Methodname represents the name of a javamethod. Valid methods are:
...