agent-browser

A usage guide for agent-browser, a tool for navigating and interacting with web pages. It covers finding page elements, filling forms, handling tabs and sign-in, waiting for content, and collecting page data.

In plain words
What is it for?
Use it before running agent-browser commands to navigate pages, click or fill controls, handle authentication, take screenshots, and extract information.
Why use it?
It provides the steps needed to use agent-browser correctly, including how to inspect pages before interacting with them.

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

Made for: Claude Code, Codex.

Per session 113 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,154 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
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 $0.00113 $0.04154
Opus 5 $0.00056 $0.02077
Sonnet 5 $0.00023 $0.00831
Haiku 4.5 $0.00011 $0.00415

Measured 2d ago against content hash c282df3c7ea8, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, 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 2d 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.

Makes network callslowCapability

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

save cookies to a file and use `cookies set --curl <file>`. Stay on the
.agents/skills/agent-browser/SKILL.md · 484 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. 2d ago First seen · 484 lines · 113 tokens per session scan A c282df3c7ea8

Subscribe to this mod's changes

agent-browser is a skill published in the GitHub repository molefrog/moi (133 stars, last pushed 3d ago), with no licence file. It adds 113 tokens to every session and 4,154 once invoked, about $0.0006 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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