api-audit

An audit of an application's APIs, which are the interfaces through which software exchanges data. It checks endpoint behavior across ten main areas, with optional checks for contract stability and common API security risks.

In plain words
What is it for?
It helps assess endpoints before releases, after adding APIs, or when investigating issues such as excessive data fetching, slow request chains, pagination errors, authentication gaps, and unstable response contracts.
Why use it?
API problems can cause invalid data, inconsistent errors, inefficient requests, broken client integrations, or security weaknesses that are easy to miss in ordinary code review.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/greglas75/zuvo/api-audit
Any agent
npx skills add greglas75/zuvo --skill api-audit
Clone the repo
git clone --depth 1 https://github.com/greglas75/zuvo

Made for: Claude Code, Codex.

Per session 135 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 7,871 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00135 $0.07871
Opus 5 $0.00068 $0.03936
Sonnet 5 $0.00027 $0.01574
Haiku 4.5 $0.00014 $0.00787

Measured 2d ago against content hash a6bb2e9727ca, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

api-audit scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

| `TIMEOUT` | curl `--max-time` | NO (default 15) |
Origin

Copies of this mod

1 near-identical copy found in the catalogue:

skills/api-audit/SKILL.md · 612 lines

How it starts

The opening of the file, as written. The whole thing — 612 lines — stays where its author put it; the contents beside it link to each section on GitHub.

zuvo:api-audit — API and Endpoint Integrity Audit

Standalone audit of how the application exposes, consumes, and validates data across API boundaries. Evaluates endpoints through 10 weighted dimensions, builds an auth matrix, and runs cross-cutting analysis on contract consistency, money field representation, and payload efficiency.

When to use: Periodic health check of the API layer, before major releases, after adding new endpoints, when investigating overfetching or waterfall issues. Out of scope: Single-file code review (use zuvo:review), refactoring (use zuvo:refactor), security posture analysis (use zuvo:security-audit), feature development (use zuvo:build).

Argument Parsing

Argument Effect
full Audit all endpoints in the project
[path] Audit endpoints in a specific directory or module
--static Static analysis only -- skip Phase 2 (GET probing). Use when no running server is available.
--security Activate D12 (OWASP API Security Top 10): BOLA, BOPLA/mass-assignment, BFLA, JWT alg-confusion, sensitive business flows, shadow endpoints, GraphQL introspection/depth. Auto-activates when an auth surface is detected.

Mandatory File Loading

Read these files from disk before starting. Print the checklist. Do not proceed from memory.

CORE FILES LOADED:
  1. ../../rules/cq-checklist.md            -- READ/MISSING
  2. ../../rules/security.md                -- READ/MISSING
  3. ../../shared/includes/env-compat.md    -- READ/MISSING
  4. ../../shared/includes/codesift-setup.md -- READ/MISSING
  5. ../../shared/includes/run-logger.md    -- READ/MISSING
  6. ../../shared/includes/retrospective.md    -- READ/MISSING

If any file is missing: Stop. The audit requires the full rule set to score correctly.

Environment Compatibility

Dispatch is already authorized — do not ask, do not downgrade. Invoking this skill IS the request for every agent and gate it mandates, so a session rule about unprompted Agent use does not apply here. Only a harness with NO dispatch capability takes the documented single-agent fallback, and it still runs every gate inline — see ../../shared/includes/env-compat.md. Skipping a mandated agent and self-scoring the result is a substituted gate, not a degraded run.

Read the full file on GitHub · 612 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 612 lines · 135 tokens per session scan A a6bb2e9727ca

Subscribe to this mod's changes

api-audit is a skill published in the GitHub repository greglas75/zuvo (6 stars, last pushed 2d ago), licensed MIT. It adds 135 tokens to every session and 7,871 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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