# Retrain an Agent

You can retrain agents by using the `AgentRetrain` action. For details on this action, refer to the IDOL Server Reference. Retraining the agent modifies the concepts of its training with the concepts of the text that you use for retraining. For example:

    http://12.3.4.56:4000/action=AgentRetrain&UserName=Administrator&AgentName=Global+Warming&PositiveDocs=534+352+4534

This action uses port `4000` to retrain the `Global Warming` agent for the `Administrator` user with the documents that have the IDs `534`, `352`, and `4534`.

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