agent-stealth-browser

A browser-automation skill designed for websites with anti-bot checks such as Cloudflare or reCAPTCHA. It can navigate pages, inspect visible controls, enter text, click elements, and extract page information.

In plain words
What is it for?
Use it to visit protected pages, log in, complete forms, take screenshots, and collect page data while preserving login state.
Why use it?
It helps automate browser tasks on sites that may block ordinary automated access.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/edwardsaga/agent-stealth-browser/examples
Any agent
npx skills add Edwardsaga/agent-stealth-browser --skill examples
Clone the repo
git clone --depth 1 https://github.com/Edwardsaga/agent-stealth-browser

Made for: Claude Code, Codex.

Per session 98 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,065 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00098 $0.01065
Opus 5 $0.00049 $0.00532
Sonnet 5 $0.00020 $0.00213
Haiku 4.5 $0.00010 $0.00106

Measured 2d ago against content hash df3fc044e202, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

agent-stealth-browser scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

examples/SKILL.md · 128 lines

How it starts

The opening of the file, as written. The whole thing — 128 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent Stealth Browser

与 agent-browser 兼容的 Stealth 模式浏览器 MCP 工具。

MCP 配置

{
  "mcpServers": {
    "stealth-browser": {
      "command": "uvx",
      "args": ["agent-stealth-browser"]
    }
  }
}

核心工作流

  1. 导航: browser_navigate {"url": "<url>"}
  2. 快照: browser_snapshot {} (返回带 @ref 的元素列表)
  3. 交互: 使用快照中的 @ref 进行操作
  4. 页面变化后重新获取快照

工具列表

导航

browser_navigate {"url": "<url>"}           # 导航到 URL
browser_close {}                            # 关闭浏览器

快照 (页面分析)

browser_snapshot {}                         # 获取可交互元素
browser_snapshot {"interactive_only": true} # 仅交互元素(默认)

交互 (使用快照中的 @ref)

browser_click {"target": "@e1"}                          # 点击
browser_fill {"target": "@e2", "text": "内容"}           # 清空并填写
browser_type {"target": "@e2", "text": "内容"}           # 逐字输入
browser_press {"key": "Enter"}                           # 按键
browser_hover {"target": "@e1"}                          # 悬停
browser_select {"target": "@e1", "value": "选项值"}      # 下拉选择
browser_scroll {"direction": "down", "amount": 500}      # 滚动

获取信息

browser_get {"what": "text", "target": "@e1"}  # 获取文本
browser_get {"what": "html", "target": "@e1"}  # 获取 HTML
browser_get {"what": "value", "target": "@e1"} # 获取输入值
browser_get {"what": "title"}                  # 获取标题
browser_get {"what": "url"}                    # 获取 URL

截图

browser_screenshot {}                          # 当前视口截图
browser_screenshot {"full_page": true}         # 全页面截图
browser_screenshot {"selector": "@e1"}         # 指定元素截图

等待

browser_wait {"ms": 2000}                      # 等待毫秒
browser_wait {"selector": ".success"}          # 等待元素出现

Cookie 持久化

browser_cookies_save {"domain": "example"}     # 保存登录状态
browser_cookies_load {"domain": "example"}     # 加载登录状态

JavaScript

browser_eval {"script": "document.title"}      # 执行 JS

示例: 表单提交

browser_navigate {"url": "https://example.com/form"}
browser_snapshot {}
# 输出: @e1 textbox "Email", @e2 textbox "Password", @e3 button "Submit"

browser_fill {"target": "@e1", "text": "[email protected]"}
browser_fill {"target": "@e2", "text": "password123"}
browser_click {"target": "@e3"}
browser_wait {"ms": 2000}
browser_snapshot {}  # 检查结果

Read the full file on GitHub · 128 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 128 lines · 98 tokens per session scan A df3fc044e202

Subscribe to this mod's changes

agent-stealth-browser is a skill published in the GitHub repository Edwardsaga/agent-stealth-browser (8 stars, last pushed 7mo ago), licensed MIT. It adds 98 tokens to every session and 1,065 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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