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.
npx skills add balsm-health/Balsm-AI --skill testing-for-xss-vulnerabilitiesgit clone --depth 1 https://github.com/balsm-health/Balsm-AIWrote 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.
[](https://agentmods.dev/skills/balsm-health/balsm-ai/testing-for-xss-vulnerabilities)<a href="https://agentmods.dev/skills/balsm-health/balsm-ai/testing-for-xss-vulnerabilities"><img src="https://agentmods.dev/badge/skills/balsm-health/balsm-ai/testing-for-xss-vulnerabilities/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/balsm-health/balsm-ai/testing-for-xss-vulnerabilities"><img src="https://agentmods.dev/badge/skills/balsm-health/balsm-ai/testing-for-xss-vulnerabilities.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00105 | $0.02696 |
| Opus 5 | $0.00053 | $0.01348 |
| Sonnet 5 | $0.00021 | $0.00539 |
| Haiku 4.5 | $0.00011 | $0.00270 |
Grade A, and why
testing-for-xss-vulnerabilities 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 9d 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.
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.
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.
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 9d ago First seen · 206 lines · 105 tokens per session scan A 0bcc31f06c88
testing-for-xss-vulnerabilities is a skill published in the GitHub repository balsm-health/Balsm-AI (2 stars, last pushed 1mo ago), with no licence file. It adds 105 tokens to every session and 2,696 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 2026-09-03.
Other skills, from other repositories
testing-for-xss-vulnerabilities
Tests web applications for Cross-Site Scripting (XSS) vulnerabilities by injecting JavaScript payloads into reflected, stored, and DOM-based contexts to demonstrate client-side code execution, session hijacking, and user impersonation. The tester identifies all injection points and output contexts, crafts…
xss-reflected-stored-dom
Detect and exploit Cross-Site Scripting (XSS) vulnerabilities including Reflected, Stored, and DOM-based variants. Use this skill when testing web applications for JavaScript injection, HTML injection, input sanitization bypass, or Content Security Policy evasion. Covers WAF bypass payloads, mutation XSS, blind XSS…
detecting-xss-vulnerabilities-in-web-apps
Detect reflected, stored, and DOM-based Cross-Site Scripting (XSS) vulnerabilities in web applications using manual payloads and browser-based analysis inside isolated lab environments. Covers OWASP A03 injection and sanitization bypass.
dom-based-cross-site-scripting-xss
Identify and exploit DOM-based Cross-Site Scripting (XSS) vulnerabilities where malicious payloads are executed entirely within the victim's browser via insecure JavaScript execution, often bypassing server-side WAFs completely.
testing-for-xss-vulnerabilities-with-burpsuite
Identifying and validating cross-site scripting vulnerabilities using Burp Suite's scanner, intruder, and repeater tools during authorized security assessments.
xss-poc
Detect and exploit XSS vulnerabilities using automated scanning with dalfox. Use when testing for reflected XSS, stored XSS, DOM-based XSS, blind XSS, when analyzing parameter reflection, or when validating XSS findings with proof of concept.