test-web-and-api-security

test-web-and-api-security is a skill for Claude Code, Codex from gaelic-ghost/socket. It costs 50 tokens per session (386 once invoked), scanned A, original, Apache-2.0.

A guide for testing an authorized website or API against common web-security practices from OWASP, a security organization. It covers identity, permissions, sessions, input, files, business logic, configuration, and data exposure.

In plain words
What is it for?
Use it to test web applications and APIs for broken access control, unsafe input handling, weak sessions, exposed data, risky server requests, and resource limits.
Why use it?
It turns broad security testing into focused checks with known roles, reproducible requests, and controlled use of scanners.

Skill for Claude CodeCodex

Written for Claude Code and Codex: shipped in a Claude Code plugin, but also agents/openai.yaml present.

Part of the cybersecurity-skills plugin — 31 skills shipped together

Good fit Use it to test web applications and APIs for broken access control, unsafe input handling, weak sessions, exposed data, risky server requests, and resource limits.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/gaelic-ghost/socket/test-web-and-api-security
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 gaelic-ghost/socket --skill test-web-and-api-security
Clone the repo
git clone --depth 1 https://github.com/gaelic-ghost/socket

Made for: Claude Code, Codex.

Or install cybersecurity-skills, the plugin that ships this one along with the rest of its 31 skills.

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 test-web-and-api-security

README.md
[![agentmods](https://agentmods.dev/badge/skills/gaelic-ghost/socket/test-web-and-api-security/github.svg)](https://agentmods.dev/skills/gaelic-ghost/socket/test-web-and-api-security)
Your own site
<a href="https://agentmods.dev/skills/gaelic-ghost/socket/test-web-and-api-security"><img src="https://agentmods.dev/badge/skills/gaelic-ghost/socket/test-web-and-api-security/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.

agentmods 80×15 button for test-web-and-api-security

Your own site · 80×15
<a href="https://agentmods.dev/skills/gaelic-ghost/socket/test-web-and-api-security"><img src="https://agentmods.dev/badge/skills/gaelic-ghost/socket/test-web-and-api-security.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 50 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 386 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 original 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 $0.00050 $0.00386
Opus 5.5 $0.00020 $0.00154
Sonnet 5.5 $0.00010 $0.00077
Haiku 4.5 $0.00005 $0.00039

Measured 1mo ago against content hash 340fcf44220e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

test-web-and-api-security 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 1mo 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.

plugins/cybersecurity-skills/skills/test-web-and-api-security/SKILL.md · 33 lines

What it actually says

Test Web And API Security

Overview

Test one scoped property at a time with role-aware accounts and reproducible requests. Use passive observation before active mutation and review automated scanner behavior before it reaches the target.

Read references/web-api-test-plan.md and current OWASP WSTG/API guidance before execution.

Workflow

  1. Load the approved scope, environment, accounts/roles, data, rate limits, and stop conditions.
  2. Map the application.
    • Record hosts, routes, APIs/schemas, roles, trust boundaries, sessions/tokens, browser controls, uploads, integrations, and state-changing operations.
  3. Capture a baseline.
    • Preserve normal requests/responses and expected authorization for each role and resource owner.
  4. Test by security property.
    • Cover identity/session, object/function authorization, input handling, browser/client boundaries, server-side fetches, files, configuration, errors, data exposure, business logic, and rate/resource controls as scope permits.
  5. Use tools deliberately.
    • Keep proxy/browser history scoped; review ZAP or Nuclei configuration/templates; exclude destructive or broad checks; record exact versions and requests.
  6. Validate candidates.
    • Reproduce with the smallest request, negative control, different role/owner, and fixed/mitigated state when available.
  7. Clean up.
    • Remove test data/accounts/tokens, restore state, and report anything that could not be reverted.

Output

Return scope/accounts, application map, tests and evidence, validated findings, negative results/coverage gaps, cleanup, and retest criteria.

Files

What ships with it

2 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.

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. 1mo ago First seen · 33 lines · 50 tokens per session scan A 340fcf44220e

Subscribe to this mod's changes

test-web-and-api-security is a skill published in the GitHub repository gaelic-ghost/socket (7 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 50 tokens to every session and 386 once invoked, about $0.0002 per session on Opus 5.5. 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.

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