In many cases, the agents in the system rely on infrastructure for specific purposes. Examples are certification authorities that provide certificates in a public key infrastructure, directory services that can be queried to find other agents with specific capabilities, or external sensors that provide information about the environment. These infrastructure services have to be identified and a decision whether these have to be implemented or can be reused from existing solutions has to be made.

In many cases, these services are provided by the multi-agent system that serves as the basis for the system under development or are available as external services that can be called over a clearly defined interface. In other cases, the services have to be implemented by the developers. Identifying the supporting infrastructure early on can help find the best multi-agent system to use and help define requirements on the external services if they are purchased from other vendors.