Abstract: A web service interrogation method comprises receiving natural language request data at a processor. The processor parses the request data. A data structure comprising a directory of web service resources is interrogated based upon the parsed input data. Fields within a web service identified from said data structure are matched to the parsed input data. Service data records corresponding to at least some of said webs service resources that fulfill a matching criteria to the request data are aggregated. The service data is output to a user. A web service interrogation apparatus is also disclosed.