api-17-websocket

api-17-websocket is a skill for Claude Code, Codex from vigilantshield/Claude-HunterKit. It costs 42 tokens per session (795 once invoked), scanned A, original, no licence file.

A security-testing guide for WebSocket APIs, which keep a live connection open between a client and server. It focuses on checking who may connect, send messages, access subscriptions, and make repeated requests.

In plain words
What is it for?
Use it to test WebSocket authentication, origin checks, message changes, subscription access controls, and rate limits.
Why use it?
It helps find security gaps that ordinary request-and-response API tests can miss, including forged browser connections and unauthorized subscription access.

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/vigilantshield/claude-hunterkit/api-17-websocket
Any agent
npx skills add vigilantshield/Claude-HunterKit --skill api-17-websocket
Clone the repo
git clone --depth 1 https://github.com/vigilantshield/Claude-HunterKit

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 api-17-websocket

README.md
[![agentmods](https://agentmods.dev/badge/skills/vigilantshield/claude-hunterkit/api-17-websocket.svg)](https://agentmods.dev/skills/vigilantshield/claude-hunterkit/api-17-websocket)
Your own site
<a href="https://agentmods.dev/skills/vigilantshield/claude-hunterkit/api-17-websocket"><img src="https://agentmods.dev/badge/skills/vigilantshield/claude-hunterkit/api-17-websocket.svg" alt="Measured on agentmods" height="20"></a>
Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 795 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 $0.00042 $0.00795
Opus 5 $0.00021 $0.00398
Sonnet 5 $0.00008 $0.00159
Haiku 4.5 $0.00004 $0.00080

Measured 5d ago against content hash 496adf880070, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

api-17-websocket 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.

- curl / httpx
skills/api/api-17-websocket/SKILL.md · 117 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

Files

What ships with it

1 file 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.

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 · 117 lines · 42 tokens per session scan A 496adf880070

Subscribe to this mod's changes

api-17-websocket is a skill published in the GitHub repository vigilantshield/Claude-HunterKit (5 stars, last pushed 1mo ago), with no licence file. It adds 42 tokens to every session and 795 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 2026-08-31.

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