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How to script a web task in Python with one natural language goal with Jev Ultrafast

Use the Agent class to run any goal on any URL and stream its state from your own script.

Short answer: Install as in Try it and fill in .env; then in your script, from jev_ultrafast import Agent and pass a URL and a goal, as in the README example; Iterate over agent.run() and log elapsed_ms and status. All steps.

Who it is forA Python developer who wants to drop a fast web agent into an automation script.

The problemWriting selectors or site-specific scripts for every web task breaks whenever a page changes.

The outcomeA script that opens a URL, pursues one plain language goal and reports elapsed time and status at each step.

What you need first

  • Python with uv
  • Chrome with remote debugging allowed (connected through Browser Harness, installed by uv sync)
  • TYPESAFE_API_KEY and TEXT_MODEL_API_KEY (an OpenRouter key in the example config)
  • Live examples make paid API calls

Steps

  1. Install as in Try it and fill in .env
  2. In your script, from jev_ultrafast import Agent and pass a URL and a goal, as in the README example
  3. Iterate over agent.run() and log elapsed_ms and status
  4. Run it with uv run --env-file .env python your_script.py
  5. Try the bundled example: uv run --env-file .env python examples/run.py with --url and --goal

Prompt for your agent

Write a Python script with browser-use/jev-ultrafast's Agent that opens <url> and pursues the goal <goal>, logs elapsed_ms and status per step, and then independently checks the page to confirm the goal was met before reporting success.

Caveat. A DONE choice still needs independent verification. Shadow roots, frames, canvas, uploads and pop-up tabs are outside this MVP.

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