Embodiments of the present invention provide a method, system and computer program product for melding mediation and adaptation modules of a service component architecture (SCA) system. A method for melding mediation and adaptation modules of an SCA system can include selecting each of a mediation module and an adaptation module in an integrated development tool executing in memory by a processor of a computer and loading respectively different descriptor files for each of the mediation module and the adaptation module. The method further can include combining descriptors from the different descriptor files into a single descriptor file for a melded module. Finally, the method can include modifying names and wiring descriptors in the single descriptor file for the melded module to account for a combination of the mediation component and the adaptation component in the melded component.