Technical & DevelopmentAdvanced

safe-browser

Build secure browser agents with domain allowlists.

Developer Setup

Setup & Installation

bash

npx skills add https://github.com/browserbase/skills --skill safe-browser

npx skills add https://github.com/browserbase/skills --skill safe-browser

Or paste this URL into your assistant to install:

https://github.com/browserbase/skills/tree/main/skills/safe-browser View on GitHub

Overview

What This Skill Does

Constrains AI agents by enforcing a domain allowlist with Fetch interception, preventing raw shell or CDP access.

Application

When to use this Skill

When you want to restrict an AI agent to browse only within an allowlist of approved domains.
When building secure browser-agent applications that prevent access to sensitive or malicious sites.
When demonstrating browser task execution under strict CDP and network request interception.
When testing offline navigation handlers or custom network blocklist policies.
When you need a secure, sandboxed client browser boundary for untrusted agents.

Documentation

Show Skills.md file

Safe Browser

Build a local browser-agent demo where the generated runtime agent has exactly one browser capability: safe_browser. The tool owns the Playwright/CDP session, enables Fetch interception for all requests, and fails any request whose host is not allowlisted.

This skill is a builder guide. The skill itself is not the runtime boundary; the generated Claude Agent SDK app is.

When to Use

The user asks for a browser agent that must stay on an allowlisted site.
The user wants to demonstrate prompt-injection or link-following containment.
The user asks to build a scraper or browser workflow with domain policy.
The user asks for a Claude Agent SDK example first. Keep OpenAI Agents SDK variants out unless requested.

Default Approach

Use the Claude Agent SDK local template:

cp -R skills/safe-browser/templates/claude-agent-sdk /tmp/safe-browser-demo
cd /tmp/safe-browser-demo
npm install
cp ~/Developer/scratchpad/.env .env 2>/dev/null || true
node hn-scraper-demo.mjs

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