Research conducted in the web services area has enabled organizations to integrate their applications, which has enabled the automation of business processes in several areas. However, it is necessary to provide solutions that favor the selection and integration of these web services at runtime effectively and efficiently. In the current web architecture many of these web services are designed according to the REST architectural style, but such solutions are insufficient and inefficient. This paper presents a service-based tool which makes use of ontologies to perform the semantic annotation of restful web services syntactically described in WSDL documents, enabling the invocation, discovery and composition tasks of these web services to occur automatically. An example of use is discussed, illustrating the use of semantic annotation of a restful web service and a SPARQL query, exemplifying its recovery in a semantic repository.