There are an increasing number of initiatives for the migration of agents research towards new Internet technologies such as the semantic web, Grid, and web services. On the one hand, service oriented Grid architectures need to support dynamic cooperation, negotiation and coordination between web services controlling Grid resources, for efficient resource and task allocation and execution. On the other hand, the Grid can facilitate agent communication, life-cycle management, and access to resources for agents. The insurance sector is one such area that would benefit from the automation brought by multi-agent systems techniques in handling claims and detecting fraudulent cases. In this paper, we discuss our work on facilitating dynamic and adaptive negotiation between web and grid services. We describe our deployed approach in an InsuranceGrid, which manages businesses involved in dealing with car damage claims for a number of insurance companies.