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What you can do with Fastbrowse

fastbrowse is a Python browser agent where a choice model picks each action from the controls on a page, and answers come back with verbatim quotes from that page.

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agent-labs-dev/fastbrowse on GitHub

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What do you want to do?

4 use cases

  • Get a cited answer from a live web page

    Ask a question about a web page and get an answer where each claim quotes the page.

    View prompt
    Use the fastbrowse repo to answer <question> about the page at <start URL>. Run `uvx fastbrowse "<question>" --start <start URL> --json` and return the answer with its quotes. Verify that each factual claim in the answer matches a quote from the page.

  • Log in from a Bitwarden vault and stop before submitting

    Fill a login form from a vault item, then pause for confirmation before any submit.

    View prompt
    Use the fastbrowse repo to sign into <start URL> with the Bitwarden item <vault item name> and report the page the run stops on. Run `uv run fastbrowse "<task>" --start <start URL> --bitwarden <vault item name>` without --authorize. Verify the result reports needs_confirmation and that no submit happened.

  • Add items to a cart in a profile that stays signed in

    Reuse a Chrome profile that is already signed in to run cart tasks without a password.

    View prompt
    Use the fastbrowse repo to add <item> to the cart on <site URL> using the profile at <profile dir>. Run `uv run fastbrowse "<task>" --start <site URL> --profile <profile dir>` and report the status and cost. Verify the item appears in the cart in that profile.

  • Read values from an open Electron app window

    Attach to a running Electron app, such as VS Code, and read what its window shows.

    View prompt
    Use the fastbrowse repo to read <value> from the open window titled <window title> in an Electron app listening on port <port>. Run `uv run fastbrowse "<task>" --cdp-port <port> --target-match <window title>` and return the answer. Verify that the window stays open after the run.

How to use Fastbrowse

  1. Check you have what it needs: uv, which fetches Python 3.13 or newer; OPENROUTER_API_KEY, or AI_GATEWAY_API_KEY for the Vercel AI Gateway; BROWSER_USE_API_KEY for the default cloud browser, or the --local flag for local Chrome.
  2. Open agent-labs-dev/fastbrowse on GitHub and read the README and license.
  3. uv tool install fastbrowse
  4. export OPENROUTER_API_KEY=...
  5. export BROWSER_USE_API_KEY=...
  6. uvx fastbrowse "What is the title of the top story right now?" --start https://news.ycombinator.com/

These steps come from our top use case, Get a cited answer from a live web page, which also has a copy-paste agent prompt.

Fastbrowse alternatives · Best AI repos for Work and operations

About this repo

  • Who it is forDevelopers and AI agents that need a browser to answer questions, fill forms or drive a signed-in session, with cited answers and credentials kept out of model view.
  • Why it is hot
  • LanguagePython
  • Sourcegithub.com/agent-labs-dev/fastbrowse · Back to Hot repos

Requirements

  • uv, which fetches Python 3.13 or newer
  • OPENROUTER_API_KEY, or AI_GATEWAY_API_KEY for the Vercel AI Gateway
  • BROWSER_USE_API_KEY for the default cloud browser, or the --local flag for local Chrome
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Questions about Fastbrowse

What is Fastbrowse?

fastbrowse is a Python browser agent where a choice model picks each action from the controls on a page, and answers come back with verbatim quotes from that page. It is an open-source project on GitHub: https://github.com/agent-labs-dev/fastbrowse.

Who is Fastbrowse for?

Developers and AI agents that need a browser to answer questions, fill forms or drive a signed-in session, with cited answers and credentials kept out of model view.

What can I do with Fastbrowse?

4 use cases so far, for example: Get a cited answer from a live web page; Log in from a Bitwarden vault and stop before submitting; Add items to a cart in a profile that stays signed in. Each has steps and a copy-paste agent prompt.

What do I need to run Fastbrowse?

uv, which fetches Python 3.13 or newer; OPENROUTER_API_KEY, or AI_GATEWAY_API_KEY for the Vercel AI Gateway; BROWSER_USE_API_KEY for the default cloud browser, or the --local flag for local Chrome.

What are alternatives to Fastbrowse?

Other hot AI repos in Work and operations: AI Job Search, Solidcraft, Awesome AI Agent Platforms, Nautilo, Dontbemichael.

Is Fastbrowse safe to run?

Deduped does not own, audit or vouch for it. Read the README and license, run it on your own systems first and review every command before you run it.