Individual skill

api-security

OWASP API Top 10 for HTTP, GraphQL, and gRPC endpoints: input validation, route rate limiting, mass assignment, response caching, and gateway-versus-service control placement. Use when generating or reviewing HTTP handlers, GraphQL resolvers, gRPC service methods, or any API endpoint change.

skills/api-security/SKILL.md

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# API Security

## Rules (for AI agents)

### ALWAYS
- Require authentication on every non-public endpoint. Default to authenticated; opt
  out for genuinely public routes by explicit annotation.
- Consult `auth-security` for **who the caller is and what they may touch**. It owns
  the credential (algorithm pinning, expiry, lifetime, session, CSRF) and the
  permission (object-level BOLA/IDOR checks, multi-key routes, streaming subjects,
  function-level role gating). Any endpoint that reads or writes a resource by id
  needs it; this skill covers everything else about the endpoint.
- Validate all request inputs against an explicit schema (JSON Schema, Pydantic,
  Zod, validator/v10 struct tags). Reject early; never propagate untrusted input
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