AgentToolDrop

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Stagehand

Adds natural-language act, observe and extract calls to Playwright-style browser code in TS, Python and Go

Install with pnpm

pnpm add @browserbasehq/stagehand 'zod@~4.4.3'

Copied from the project's docs at github.com/browserbase/stagehand

Why you'd want it

Stagehand mixes ordinary browser code (goto, click, locator) with three AI calls: act performs an action described in plain language, observe returns real selectors, and extract returns data validated against a Zod or Pydantic schema. Because observe hands back selectors, you can fill credentials yourself without sending them to the model, and the README says act, observe and extract refresh how an action happens when a site changes. It runs against a local Chrome or a Browserbase cloud browser, which adds a model gateway, server-side caching, proxies and session recordings.

Best for

  • Developers who already write Playwright-style scripts
  • Structured data extraction from logged-in sites
  • TypeScript, Python or Go codebases

Use it when

You want to keep control of each browser step in code but let a model handle brittle selectors and data extraction.

Skip it if

You do not want to write browser code yourself. Caching, the model gateway and cloud browsers require a Browserbase API key, and local runs need Chrome installed.

Related tools

Same category or shared tags, by drop score.

  1. Rank 14

    Browser Use

    Browser agent

    Lets an LLM drive a real browser to complete multi-step web tasks from Python code or a CLI

    • score 69
    • 118k stars
    • pushed
    • 0.13.11 on
    • MIT

    Install with uv

    uv add browser-use
    Use it when, skip it if, stats for Browser Use

    Why you'd want it

    Browser Use is an open-source browser agent: you give it a task in plain language and a model, and it opens a browser, works through the site and returns a result. It works with OpenAI, Anthropic and Google models or local models through Ollama, accepts custom tools registered as Python functions, and can drive a local Chrome profile, a remote browser over CDP or a Browser Use Cloud browser. A CLI gives existing agents such as Claude Code, Codex and Cursor browser access, and an integration implements Claude's browser toolset with Browser Use as the driver.

    Best for

    • Python apps that automate tasks on real websites
    • Giving a coding agent browser access
    • Projects that may move to hosted browsers later

    Use it when

    You want an agent that completes tasks on live websites, such as forms, bookings and lookups, from your own Python code with your choice of model.

    Skip it if

    You only need fixed, scripted browser steps with no model in the loop. The library needs Python 3.11 or later, and stealth browsers, proxies and the BU2 model are paid Browser Use Cloud services.

    Stats

    Stars
    118,001
    Last push
    Release
    0.13.11,
    License
    MIT
    Pricing
    Open source
    Works with
    Claude Code, Codex, Cursor
    Drop score
    69 of 100

    Full stat block for Browser Use

  2. Rank 27

    Model Context Protocol

    MCP server

    Defines an open standard for connecting AI applications to tools, data sources and workflows

    • score 61
    • 9.5k stars
    • pushed
    • 2026-07-28 on
    • Mixed license

    Install the TypeScript server SDK

    npm install @modelcontextprotocol/server zod
    Use it when, skip it if, stats for Model Context Protocol

    Why you'd want it

    MCP is the protocol behind every server in this category: a server exposes tools, resources and prompts once, and any MCP client, such as Claude, ChatGPT, VS Code or Cursor, can discover and call them. Messages are JSON-RPC 2.0 over stdio for local servers or Streamable HTTP for remote ones, with OAuth recommended for remote auth. Official SDKs cover TypeScript, Python, C#, Go, Rust, Ruby, Java, Swift, PHP and Kotlin, so you can build a server or client in the language you already use.

    Best for

    • Exposing your own API or data to AI clients
    • Building an agent host that connects to many servers
    • Standardizing tool integrations across clients

    Use it when

    You want agents to reach an internal system or service, or you are building a client that should plug into existing MCP servers.

    Skip it if

    You only want to use existing servers; the spec and SDKs are for building servers and clients, so pick a server entry instead.

    Stats

    Stars
    9,454
    Last push
    Release
    2026-07-28,
    License
    Mixed license
    Pricing
    Open source
    Drop score
    61 of 100

    Full stat block for Model Context Protocol

  3. Rank 51

    UI-TARS Desktop

    Browser agent

    Controls your computer and browser from screenshots, with mouse and keyboard actions chosen by a vision model

    • score 48
    • 39.3k stars
    • pushed
    • v0.3.1 on
    • Apache-2.0

    Download from GitHub releases or install with Homebrew

    brew install --cask ui-tars
    Use it when, skip it if, stats for UI-TARS Desktop

    Why you'd want it

    The repo ships two ByteDance projects. UI-TARS Desktop is a desktop app with a native GUI agent driven by the UI-TARS and Seed-1.5-VL/1.6 vision-language models: it takes screenshots, recognizes what is on screen and controls the mouse and keyboard to follow natural-language instructions, with local computer and browser operators. Agent TARS is a separate CLI and Web UI agent that controls browsers through visual grounding, the DOM or a hybrid of both, and can mount MCP servers to reach other tools.

    Best for

    • Experimenting with vision-based computer use
    • Automating desktop apps that have no API
    • Running an open GUI agent model you deploy yourself

    Use it when

    You want an agent that operates desktop apps or a browser by looking at the screen, and you can point it at a UI-TARS model endpoint, for example one deployed on Hugging Face.

    Skip it if

    You use more than one monitor (the quick start says only single-monitor setups are supported) or want a library to embed in your own code. The free remote operator service was discontinued on August 20, 2025.

    Stats

    Stars
    39,279
    Last push
    Release
    v0.3.1,
    License
    Apache-2.0
    Pricing
    Open source
    Works with
    macOS, Windows
    Drop score
    48 of 100

    Full stat block for UI-TARS Desktop

For agents

The same entry, as files an agent can read without scraping this page. 

# read one entry
curl -s https://agenttooldrop.com/tools/stagehand.md

# list the MCP servers in the catalog
curl -s https://agenttooldrop.com/tools.json \
  | jq -r '.tools[] | select(.category=="mcp-server") | .slug'