Individual skill

api-auth-and-jwt-abuse

API authentication and JWT abuse playbook. Use when testing bearer tokens, API keys, claim trust, header spoofing, rate limits, and API auth boundary weaknesses.

skills/api-auth-and-jwt-abuse/SKILL.md

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Last checked: Nov 2, 2026

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# SKILL: API Auth and JWT Abuse — Token Trust, Header Tricks, and Rate Limits

> **AI LOAD INSTRUCTION**: Use this skill when APIs rely on JWT, bearer tokens, API keys, or weak request identity signals. Focus on token trust boundaries, claim misuse, header spoofing, and rate-limit bypass.

## 1. TOKEN TRIAGE

Inspect:

- `alg`, `kid`, `jku`, `x5u`
- role, org, tenant, scope, or privilege claims
- issuer and audience mismatches
- reuse of mobile and web tokens across products

## 2. QUICK ATTACK PICKS