api-attacker

api-attacker is an agent for coding agents from morodomi/redteam-skills. It costs 33 tokens per session (901 once invoked), scanned A, original, MIT.

An agent that uses static analysis—examining source code without running it—to find common API security weaknesses.

In plain words
What is it for?
Use it to check APIs for mass assignment, object-level authorization failures, missing rate limiting, and excessive data exposure in Laravel, Django, Flask, and Express code.
Why use it?
It helps reveal missing authorization, input controls, rate limits, or safe response filtering before those problems reach production.

Agent

Part of the redteam-core plugin — 4 skills, 18 agents shipped together

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 agents/morodomi/redteam-skills/api-attacker
Clone the repo
git clone --depth 1 https://github.com/morodomi/redteam-skills

Or install redteam-core, the plugin that ships this one along with the rest of its 4 skills, 18 agents.

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-attacker

README.md
[![agentmods](https://agentmods.dev/badge/agents/morodomi/redteam-skills/api-attacker.svg)](https://agentmods.dev/agents/morodomi/redteam-skills/api-attacker)
Your own site
<a href="https://agentmods.dev/agents/morodomi/redteam-skills/api-attacker"><img src="https://agentmods.dev/badge/agents/morodomi/redteam-skills/api-attacker.svg" alt="Measured on agentmods" height="20"></a>
Per session 33 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 901 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00033 $0.00901
Opus 5 $0.00016 $0.00451
Sonnet 5 $0.00007 $0.00180
Haiku 4.5 $0.00003 $0.00090

Measured 3d ago against content hash b0521a22ecbc, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

api-attacker 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 3d 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/redteam-core/agents/api-attacker.md · 111 lines

How it starts

The opening of the file, as written. The whole thing — 111 lines — stays where its author put it; the contents beside it link to each section on GitHub.

API Attacker

API固有の脆弱性を静的解析で検出するエージェント。

Detection Targets

Type Description Pattern
Mass Assignment 一括代入脆弱性 $request->all(), fillable未定義
BOLA オブジェクトレベル認可不備 IDパラメータの権限チェック漏れ
Rate Limiting レート制限なし throttle未設定のAPI
Excessive Data Exposure 過剰なデータ露出 全カラム返却、機密フィールド露出

Framework Detection Patterns

Framework Vulnerable Pattern Safe Pattern
Laravel $request->all(), Model::create($input) $request->only(), $fillable
Django Model(**request.data) Serializer with fields
Flask Model(**request.json) Schema validation
Express Model.create(req.body) Validation middleware

Dangerous Patterns

patterns:
  # Mass Assignment
  - '\$request->all\s*\(\)'
  - 'Model::create\s*\(\s*\$request'
  - '\*\*request\.(data|json)'
  - 'create\s*\(\s*req\.body\s*\)'

  # BOLA - Missing ownership check
  - 'find\s*\(\s*\$id\s*\)'
  - 'findOrFail\s*\(\s*\$'
  - 'get_object_or_404\s*\('

  # Rate Limiting Missing
  - 'Route::.*->middleware\s*\([^)]*(?!throttle)'

  # Excessive Data Exposure
  - 'return\s+\$\w+->toArray\s*\(\)'
  - '->get\s*\(\)\s*$'
  - 'SELECT\s+\*\s+FROM'

Output Format

{
  "metadata": {
    "scan_id": "<uuid>",
    "scanned_at": "<timestamp>",
    "agent": "api-attacker"
  },
  "vulnerabilities": [
    {
      "id": "API-001",
      "type": "mass-assignment",
      "vulnerability_class": "mass-assignment",
      "cwe_id": "CWE-915",
      "severity": "high",
      "file": "app/Http/Controllers/UserController.php",
      "line": 34,
      "code": "User::create($request->all())",
      "description": "Mass assignment vulnerability - all request data passed to create",
      "remediation": "Use $request->only(['name', 'email']) or define $fillable"
    }
  ],
  "summary": {
    "total": 1,
    "critical": 0,
    "high": 1,
    "medium": 0,
    "low": 0
  }
}

Severity Criteria

Read the full file on GitHub · 111 lines

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. 3d ago First seen · 111 lines · 33 tokens per session scan A b0521a22ecbc

Subscribe to this mod's changes

api-attacker is an agent published in the GitHub repository morodomi/redteam-skills (2 stars, last pushed 6mo ago), licensed MIT. It adds 33 tokens to every session and 901 once invoked, about $0.0002 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 2026-08-31.

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