Output Format (0.x) - Browser Use

This page is for browser-use 0.x. Current docs: Introduction. Upgrading: Migrating to 1.0. To stay on 0.x, pin it: pip install 'browser-use<1'.

Agent History

The run() method returns an AgentHistoryList object with the complete execution history:

history = await agent.run()

# Access useful information
history.urls()                    # List of visited URLs
history.screenshot_paths()        # List of screenshot paths  
history.screenshots()             # List of screenshots as base64 strings
history.action_names()            # Names of executed actions
history.extracted_content()       # List of extracted content from all actions
history.errors()                  # List of errors (with None for steps without errors)
history.model_actions()           # All actions with their parameters
history.model_outputs()           # All model outputs from history
history.last_action()             # Last action in history

# Analysis methods
history.final_result()            # Get the final extracted content (last step)
history.is_done()                 # Check whether the agent emitted a done action
history.is_successful()           # Agent-reported success (None if not done)
history.has_errors()              # Check if any errors occurred
history.model_thoughts()          # Get the agent's reasoning process (AgentBrain objects)
history.action_results()          # Get all ActionResult objects from history
history.action_history()          # Get truncated action history with essential fields
history.number_of_steps()         # Get the number of steps in the history
history.total_duration_seconds()  # Get total duration of all steps in seconds

# Structured output (when using output_model_schema)
history.structured_output         # Property that returns parsed structured output

See all helper methods in the AgentHistoryList source code.

Structured Output

For structured output, use the output_model_schema parameter with a Pydantic model. Example. is_done() does not imply success. is_successful() reports the agent’s own assessment; verify important external outcomes, such as a submitted form or a completed purchase, against the destination system.

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