agent-browser

agent-browser is a skill for Claude Code, Codex from paperclipai/paperclip. It costs 40 tokens per session (1,103 once invoked), scanned A, original, MIT.

A supervised browser tool for inspecting or using web pages and web apps that ordinary page downloads cannot fully display.

In plain words
What is it for?
Use it to inspect dynamic pages, reproduce interface bugs, fill simple forms, capture screenshots, and verify short user flows.
Why use it?
It helps verify pages that load content with JavaScript or require interactive checks. It provides evidence such as screenshots, console messages, and network activity.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

About the project

Paperclip is a Node.js server and React application for coordinating AI agents as a business team, with goals, organizational roles, budgets, governance, and work tracking in one interface. It is used by people managing multiple agents or autonomous agent organizations across tools such as OpenClaw, Claude Code, Codex, and Cursor. The catalogue includes skills, agents, an MCP add-on, and an instruction for working with Paperclip.

paperclipai/paperclip · 80,074 stars · on GitHub · paperclip.ing

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/paperclipai/paperclip/agent-browser
Any agent
npx skills add paperclipai/paperclip --skill agent-browser
Clone the repo
git clone --depth 1 https://github.com/paperclipai/paperclip

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for agent-browser

README.md
[![agentmods](https://agentmods.dev/badge/skills/paperclipai/paperclip/agent-browser.svg)](https://agentmods.dev/skills/paperclipai/paperclip/agent-browser)
Your own site
<a href="https://agentmods.dev/skills/paperclipai/paperclip/agent-browser"><img src="https://agentmods.dev/badge/skills/paperclipai/paperclip/agent-browser.svg" alt="Measured on agentmods" height="20"></a>
Per session 40 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,103 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 5.1 $0.00040 $0.01103
Opus 5 $0.00020 $0.00551
Sonnet 5 $0.00008 $0.00221
Haiku 4.5 $0.00004 $0.00110

Measured 6d ago against content hash 362f7b9d0229, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

agent-browser scanned grade A with 1 finding 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 6d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- You need to read JavaScript-rendered content that `curl`/`wget` will not see.
packages/skills-catalog/catalog/optional/browser/agent-browser/SKILL.md · 94 lines

How it starts

The opening of the file, as written. The whole thing — 94 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent Browser

Use a controlled browser to verify behavior, capture evidence, or extract information from web pages that a static fetch cannot reach (SPAs, login-gated pages, dynamic content). This skill is about supervised verification, not unattended scraping.

When to use

  • You need a screenshot of a deployed page or a local dev server to confirm a UI change.
  • You need to read JavaScript-rendered content that curl/wget will not see.
  • A user reports a UI bug and you need to reproduce it interactively to capture console errors, network requests, or layout state.
  • You need to walk through a short flow (load page, click, observe) to verify acceptance criteria.

When not to use

  • The page is reachable as static HTML. Use curl/HTTP fetch — it is cheaper, faster, and more reliable.
  • The task is unattended large-scale scraping. That belongs to a dedicated scraper with rate limits, robots.txt handling, and a real user agent policy — not this skill.
  • The site is behind authentication you do not own credentials for, or whose terms of service prohibit automation.
  • The site involves sensitive accounts (banking, healthcare, government) where automation risks lockout or compliance issues.

Before launching the browser

  • Confirm the URL and what state should be true after navigation.
  • Decide what evidence is needed: full-page screenshot, viewport screenshot, console log, network trace, HTML snapshot, extracted text.
  • Decide the viewport size that matters for the task (mobile vs desktop). Default to a desktop size unless the task is mobile-specific.
  • For local dev servers, confirm the server is running and the port is what you expect.

Driving the browser

A typical verification session:

  1. Launch with a real-looking user agent when the target is the public internet; an unrealistic UA flags automation traffic.
  2. Set a sane viewport (e.g., 1366×768 desktop, 390×844 iPhone-ish).
  3. Navigate and wait for the right signal. Prefer waiting for a specific selector or network-idle over arbitrary sleeps.
  4. Capture evidence immediately after the wait condition succeeds, before any interaction perturbs the state.
  5. Interact deliberately. One click at a time, with a wait between actions; re-screenshot after each meaningful state change.
  6. Read the console and network panels for unexpected errors, 4xx/5xx responses, or slow requests.
  7. Close the browser cleanly when done. Long-running browser sessions leak memory and hold ports.

Read the full file on GitHub · 94 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. 6d ago First seen · 94 lines · 40 tokens per session scan A 362f7b9d0229

Subscribe to this mod's changes

agent-browser is a skill published in the GitHub repository paperclipai/paperclip (80,074 stars, last pushed today), licensed MIT. It adds 40 tokens to every session and 1,103 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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