Detect API Business Logic Abuse
Detection and response methodology for API business logic abuse - BOLA / IDOR (OWASP API1:2023), request-rate abuse (API4:2023), and out-of-order workflow attacks against REST and GraphQL APIs (MITRE ATT&CK T1190, with high-volume enumeration resembling T1595). Works off API gateway and reverse-proxy access logs (nginx, Apache, AWS ALB / API Gateway, Azure APIM and Front Door, Cloudflare) plus WAF and application audit logs. Gives the method for spotting one principal touching object IDs across many owners, per-principal velocity spikes, and workflow step-skipping, plus public rule sources and object-level-authorization hardening. Use when investigating suspicious API access, hunting for IDOR or BOLA enumeration, triaging a spike of 403 or 404 responses from one token, building rate or sequence anomaly detection, or hardening an API against BOLA.
Security AStatic scan found no risk patternsHow grading works ›
What this skill does
Detect API Business Logic Abuse is a community-contributed Claude Code skill in the web-security sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/detect-api-business-logic-abuse/ and loads when your prompt matches the skill's trigger.
When to invoke it: Use when investigating suspicious API access, hunting for IDOR or BOLA enumeration, triaging a spike of 403 or 404 responses from one token, building rate or sequence anomaly detection, or hardening an API against BOLA.
Who uses this skill
The Detect API Business Logic Abuse Claude Code skill is built for security engineers, penetration testers, DevSecOps practitioners, and development teams hardening codebases and infrastructure. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 211,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).
How to install
Free
Manual install (2 steps)
mkdir -p ~/.claude/skills/detect-api-business-logic-abuse
curl -L https://claudskills.com/skills/detect-api-business-logic-abuse/SKILL.md \
-o ~/.claude/skills/detect-api-business-logic-abuse/SKILL.md
Or just download SKILL.md directly and drop it into ~/.claude/skills/detect-api-business-logic-abuse/. Claude Code auto-discovers it on next session.
Skills live at ~/.claude/skills/detect-api-business-logic-abuse/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\detect-api-business-logic-abuse\SKILL.md on Windows. See the full install guide for step-by-step instructions.
Telegram
📱 Install from your phone or desktop Telegram
Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →
Pro
One-click install via the desktop app
The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.
Pro
For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.
Frequently asked questions
How do I install the Detect API Business Logic Abuse Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy
SKILL.md from the source repository to
~/.claude/skills/detect-api-business-logic-abuse/SKILL.md and restart Claude Code. Both flows are detailed at
claudskills.com/install/.
What does the Detect API Business Logic Abuse skill do?
Detection and response methodology for API business logic abuse - BOLA / IDOR (OWASP API1:2023), request-rate abuse (API4:2023), and out-of-order workflow attacks against REST and GraphQL APIs (MITRE ATT&CK T1190, with high-volume enumeration resembling T1595). Works off API gateway and reverse-proxy access logs (nginx, Apache, AWS ALB / API Gateway, Azure APIM and Front Door, Cloudflare) plus WAF and application audit logs. Gives the method for spotting one principal touching object IDs across many owners, per-principal velocity spikes, and workflow step-skipping, plus public rule sources and object-level-authorization hardening. Use when investigating suspicious API access, hunting for IDOR or BOLA enumeration, triaging a spike of 403 or 404 responses from one token, building rate or sequence anomaly detection, or hardening an API against BOLA.
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the Detect API Business Logic Abuse skill?
Use Detect API Business Logic Abuse when your Claude Code task falls under the Security category — specifically in the web security area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Detect API Business Logic Abuse" or describe the task and let Claude pick). Browse related skills at
/category/security/.
What is a Claude Code skill and how does the Detect API Business Logic Abuse skill fit in?
A Claude Code skill is a
SKILL.md file that lives under
~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Detect API Business Logic Abuse is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security category. Learn more at
/learn/what-is-a-claude-skill/.
Attribution & license
Cite this skill
If you reference this skill in a blog post, paper, or documentation, you can cite it as:
APA
umbrasec-labs. (2026). Detect API Business Logic Abuse [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/detect-api-business-logic-abuse/
BibTeX
@misc{detect-api-business-logic-abuse-2026,
author = {umbrasec-labs},
title = {Detect API Business Logic Abuse [Claude Code skill]},
year = {2026},
publisher = {ClaudSkills},
url = {https://claudskills.com/skills/detect-api-business-logic-abuse/}
}Embed this skill
Promote, attribute, or link this skill from your own README, blog post, or documentation. All three snippets are free to use — no sign-up, no API key. More distribution surfaces →
Badge
[](https://claudskills.com/skills/detect-api-business-logic-abuse/?utm_source=badge&utm_medium=readme&utm_campaign=skill_badge)
<script>
<script src="https://claudskills.com/embed/detect-api-business-logic-abuse.js" async></script>
<iframe>
<iframe src="https://claudskills.com/embed/detect-api-business-logic-abuse.html" width="100%" height="160" frameborder="0" loading="lazy" title="ClaudSkills: Detect API Business Logic Abuse"></iframe>
Security scan
Grade A · scanned 2026-10-25 — free static scan against the OWASP Agentic Skills Top 10.
No risk patterns were found in any of the ten OWASP-aligned categories. How grading works ›
- ✓ Prompt injection
- ✓ Data exfiltration
- ✓ Supply chain
- ✓ Reverse shell
- ✓ Credentials
- ✓ Execution
- ✓ Filesystem
- ✓ Persistence
- ✓ Obfuscation
- ✓ Network
Show this grade on your repo (click to copy):
[](https://claudskills.com/skills/detect-api-business-logic-abuse/#security)
More Security skills
Browse all Security skills in the ClaudSkills registry, or explore these other picks from the same category:
Part of Acreator Store — Adam Lankamer's AI tools:
PerfectStudio ·
Ucaption ·
UTagger ·
AutoXPoster ·
TestYourSkills ·
AutomationFlows ·
Au Naturel ·
Telegram @acreatorstore