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SKILL verified MIT Self-run

Secure Api Surface

skill-wanbinyu-api-platform-skills-secure-api-surface · by Wanbinyu

>

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Install

$ agentstack add skill-wanbinyu-api-platform-skills-secure-api-surface

✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.

Security review

✓ Passed

No issues found. Passed automated security review. · v0.1.0 How review works →

  • Prompt-injection patterns
  • Secret / credential exfiltration
  • Dangerous shell & filesystem operations
  • Untrusted network calls
  • Known-malicious package signatures

What it can access

  • Network access No
  • Filesystem access No
  • Shell / process execution No
  • Environment & secrets No
  • Dynamic code execution No

From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.

View the full security report →

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Reliability & compatibility

Security review passed
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no reviews yet
1mo ago

Declared compatibility

Claude CodeClaude Desktop

Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.

Preview Execution monitoring

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About

Secure API Surface

> UUIDs are not authorization. Specs are not proof.

Overview

Catch API abuse cases product engineers ship by accident. Stay on object-level authz, exposure, mass assignment, injection surfaces, and basic abuse controls.

Scope

| In | Out | |----|-----| | Authn/z on resources | Reverse engineering, exploit PoCs | | Oversharing / DTO leaks | Full org AppSec programs | | Rate limit / pagination caps | Network pentests | | Token/session misuse on APIs | Physical security |

Steps

  1. Inventory endpoints (OpenAPI or routes).
  2. Per authenticated resource op
  • Object-level (BOLA/IDOR): user A + user B id?
  • Function-level (BFLA): non-admin -> admin op?
  • Tenant isolation?
  1. Exposure - internal fields, tokens, PII on list/detail; chatty errors.
  2. Mass assignment - client sets role, isAdmin, price, ownerId?
  3. Auth gaps - missing auth; token footguns visible in code.
  4. Injection / SSRF - query/body/file; user-supplied fetch URLs.
  5. Abuse - rate limits on auth/expensive routes; max page size; unbounded bulk.
  6. Findings - severity + concrete fix (code or gateway).

Exit criteria

  • [ ] Endpoint inventory
  • [ ] Object- and function-level checks (or N/A + why)
  • [ ] Exposure + mass assignment reviewed
  • [ ] Findings table with severity + fixes
  • [ ] Residual risk noted
  • [ ] No exploit payload chains

Anti-patterns

  • Generic OWASP essay with no endpoint table
  • Only finding: "use HTTPS"
  • Dropping working exploits into the repo
  • "We use UUIDs so IDOR is fine"

Output template

## Secure API surface review

### Scope
- Spec/routes: ...
- Auth model: ...

### Findings
| id | severity | endpoint | issue | fix |
|----|----------|----------|-------|-----|

### Checks
- [ ] Object-level authz
- [ ] Function-level authz
- [ ] Excessive data exposure
- [ ] Mass assignment
- [ ] Injection surfaces
- [ ] Rate / pagination limits

### Residual risk
- ...

### Verdict
- **block-merge** | **fix-then-merge** | **acceptable-with-followups**

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

Install and usage instructions live in the source repository linked above.

Reviews

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Versions

  • v0.1.0 Imported from the upstream source.