browser-verifier

browser-verifier is a skill for Cursor from H-mmer/pentest-agents. It costs 66 tokens per session (2,445 once invoked), scanned A, original, no licence file.

A browser-based checker for client-side security findings. It tests whether issues such as XSS, DOM flaws, postMessage problems, or prototype pollution actually run in a real browser.

In plain words
What is it for?
Use it to confirm or reject client-side vulnerability reports and capture proof of what happens in the browser.
Why use it?
It prevents browser-related findings from being reported based only on command-line evidence.

Skill for Cursor

Written for Cursor: installed under .cursor/.

Good fit Use it to confirm or reject client-side vulnerability reports and capture proof of what happens in the browser.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/h-mmer/pentest-agents/agent-browser-verifier
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 H-mmer/pentest-agents --skill agent-browser-verifier
Clone the repo
git clone --depth 1 https://github.com/H-mmer/pentest-agents

Made for: Cursor.

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 browser-verifier

README.md
[![agentmods](https://agentmods.dev/badge/skills/h-mmer/pentest-agents/agent-browser-verifier.svg)](https://agentmods.dev/skills/h-mmer/pentest-agents/agent-browser-verifier)
Your own site
<a href="https://agentmods.dev/skills/h-mmer/pentest-agents/agent-browser-verifier"><img src="https://agentmods.dev/badge/skills/h-mmer/pentest-agents/agent-browser-verifier.svg" alt="Measured on agentmods" height="20"></a>
Per session 66 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,445 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00066 $0.02445
Opus 5 $0.00033 $0.01222
Sonnet 5 $0.00013 $0.00489
Haiku 4.5 $0.00007 $0.00245

Measured 5d ago against content hash 04d4403329a0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

browser-verifier 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 5d 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.

description: "Mandatory browser verification for client-side findings (XSS, DOM, postMessage, prototype pollution). Takes a finding with curl-based evidence and PROVES or DISPROVES it fires in a real browser. No finding
providers/cursor/.cursor/skills/agent-browser-verifier/SKILL.md · 207 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. 5d ago First seen · 207 lines · 66 tokens per session scan A 04d4403329a0

Subscribe to this mod's changes

browser-verifier is a skill published in the GitHub repository H-mmer/pentest-agents (836 stars, last pushed 2mo ago), with no licence file. It adds 66 tokens to every session and 2,445 once invoked, about $0.0003 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 2026-09-03.

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