Abstract  Web services are taking an important place in the d istributed computing field, as well as in the electronic business.   In this paper we present an initial research which  deals with the issue of automated service retrieval. For that, we propose an  approach  that  exploits  the  service  interface  (input s/outputs)  and  the  domain  ontology,  in  order  to  con ceptually  index  the  web  services.  After  that  we  compute  a  similarity  score  between  the  request  and  the  indexed  web  services  th rough  the  cosine  measure. An experimentation based on the OWLTC test  collection is described to evaluate the system. The obtained results are  very encouraging and  confirm the suitability of the solution. 

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