agent-browser

agent-browser is a skill for Claude Code from t0ddharris/compound-marketing. It costs 108 tokens per session (4,501 once invoked), scanned A, original, no licence file.

A command-line tool for having an AI agent operate websites in a browser. It can navigate pages, fill forms, click controls, take screenshots, extract data, and test web applications.

In plain words
What is it for?
Use it to automate website visits, submit forms, click through workflows, capture screenshots, collect page data, or test web apps.
Why use it?
It removes repetitive browser work that would otherwise require a person to perform each action. It also helps agents inspect and test websites through normal page interactions.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Part of the compound-marketing plugin — 54 skills, 7 agents, 1 hook shipped together

Good fit Use it to automate website visits, submit forms, click through workflows, capture screenshots, collect page data, or test web apps.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/t0ddharris/compound-marketing/agent-browser
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.

Any agent
npx skills add t0ddharris/compound-marketing --skill agent-browser
Clone the repo
git clone --depth 1 https://github.com/t0ddharris/compound-marketing

Made for: Claude Code.

Or install compound-marketing, the plugin that ships this one along with the rest of its 54 skills, 7 agents, 1 hook.

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/t0ddharris/compound-marketing/agent-browser.svg)](https://agentmods.dev/skills/t0ddharris/compound-marketing/agent-browser)
Your own site
<a href="https://agentmods.dev/skills/t0ddharris/compound-marketing/agent-browser"><img src="https://agentmods.dev/badge/skills/t0ddharris/compound-marketing/agent-browser.svg" alt="Measured on agentmods" height="20"></a>
Per session 108 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,501 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown 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 $0.00108 $0.04501
Opus 5 $0.00054 $0.02250
Sonnet 5 $0.00022 $0.00900
Haiku 4.5 $0.00011 $0.00450

Measured 7d ago against content hash 81c92a28fb72, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

agent-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 7d ago.

The scan reads SKILL.md. This mod also ships 3 executable files (templates/authenticated-session.sh, templates/capture-workflow.sh, templates/form-automation.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

.claude/skills/agent-browser/SKILL.md · 526 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 7d ago First seen · 526 lines · 108 tokens per session scan A 81c92a28fb72

Subscribe to this mod's changes

agent-browser is a skill published in the GitHub repository t0ddharris/compound-marketing (1 stars, last pushed 6d ago), with no licence file. It adds 108 tokens to every session and 4,501 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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