translation/source/documents/course/01-first-agent/05-running-playground.md

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Running Mastra Studio

To test your agent as you build it, you'll need to run the Mastra Studio:

npm run dev

This will start the studio at http://localhost:4111, where you can interact with your agent and test its capabilities.

The studio provides a user-friendly interface for testing your agent, allowing you to:

  • Send messages to your agent
  • See the agent's responses
  • View the agent's thought process
  • Test tools directly
  • Debug any issues that arise

In the next step, we'll create our first agent with a simple system prompt and test it in the studio.