STARLITE is a novel web-based agent platform that allows open, dynamic execution of agent simulations. Using STARLITE researchers can start simulations as web applications whose URI can then be used by other researchers to inspect progress with these simulations and deploy their agents on them dynamically to test their behaviour and performance. We describe the overall architecture of STARLITE and exemplify its main features through a tournament simulation for the Iterated Prisoner’s Dilemma (IPD). Categories and Subject Descriptors I.2.11 [Distributed Artificial Intelligence]: Multiagent systems General Terms Experimentation Keywords Agent platforms, Game tournaments, Web agents