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SKILL.md

api-sec

Agent skill fromyaklang/hack-skills

Entry P1 category router for API security. Use when choosing between API recon, authorization, token abuse, and hidden-parameter workflows before any deeper API topic skill.

How to install api-sec

install api-sec
# install the hack-skills pack with the skills CLI
npx skills add yaklang/hack-skills

# or add only this skill to Claude Code: copy the folder

skills/api-sec/

# into

~/.claude/skills/api-sec/ (all projects)

.claude/skills/api-sec/ (one project)

skills/api-sec/SKILL.md

MITFull file
1# API Security Router
2
3This is the routing entry point for API security testing.
4
5Use this skill first to decide whether the API issue is mostly recon/docs, object authorization, token trust, or GraphQL/hidden parameters, then route to a deeper topic skill.
6
7## When to Use
8
9- The target exposes REST APIs, mobile backends, or GraphQL endpoints
10- You need to define API testing order before going into specific topics
11- You want to handle object authorization, JWT, GraphQL, and hidden fields as separate tracks
12
13## Skill Map
14
15- [API Recon and Docs](../api-recon-and-docs/SKILL.md): OpenAPI, Swagger, version drift, hidden documentation
16- [API Authorization and BOLA](../api-authorization-and-bola/SKILL.md): BOLA, BFLA, method abuse, hidden writable fields
17- [API Auth and JWT Abuse](../api-auth-and-jwt-abuse/SKILL.md): bearer token, header trust, claim abuse, rate-limit bypass
18- [GraphQL and Hidden Parameters](../graphql-and-hidden-parameters/SKILL.md): introspection, batching, undocumented fields, hidden parameters
19
20## Quick Triage
21
22| Observation | Route |
23|---|---|
24| Swagger or OpenAPI is present | [api-recon-and-docs](../api-recon-and-docs/SKILL.md) |
25| IDs appear in URL, JSON, headers, or GraphQL args | [api-authorization-and-bola](../api-authorization-and-bola/SKILL.md) |
26| JWT token visible in traffic | [api-auth-and-jwt-abuse](../api-auth-and-jwt-abuse/SKILL.md) |
27…

Excerpt shown under the repository's MIT license.

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