What is api-design-reviewer?

A review guide for checking an API—the interface software uses to communicate—before it is built or released. It covers consistency, ease of use, version changes, errors, security, compatibility, and developer experience.

Use it to review endpoints, request and response formats, versioning plans, error handling, security, backward compatibility, and documentation.

It helps catch confusing designs, unsafe behavior, inconsistent errors, and changes that could break existing users before implementation or release.

api-design-reviewer — Skill for Claude Code and Codex by seaworld008

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.

Any agent

npx skills add seaworld008/Commonly-used-high-value-skills --skill api-design-reviewer

Clone the repo

git clone --depth 1 https://github.com/seaworld008/Commonly-used-high-value-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/seaworld008/commonly-used-high-value-skills/api-design-reviewer/github.svg)](https://agentmods.dev/skills/seaworld008/commonly-used-high-value-skills/api-design-reviewer)

Your own site

<a href="https://agentmods.dev/skills/seaworld008/commonly-used-high-value-skills/api-design-reviewer"><img src="https://agentmods.dev/badge/skills/seaworld008/commonly-used-high-value-skills/api-design-reviewer/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/seaworld008/commonly-used-high-value-skills/api-design-reviewer"><img src="https://agentmods.dev/badge/skills/seaworld008/commonly-used-high-value-skills/api-design-reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 34 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,972 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

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.

Model	Per session	Once invoked
Fable 5.1	$0.00034	$0.02972
Opus 5	$0.00017	$0.01486
Sonnet 5	$0.00007	$0.00594
Haiku 4.5	$0.00003	$0.00297

Measured 13d ago against content hash ed235881cfc7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

api-design-reviewer scanned grade A with 0 findings 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 13d ago.

The scan reads SKILL.md. This mod also ships 3 executable files (scripts/api_linter.py, scripts/api_scorecard.py, scripts/breaking_change_detector.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

Copies of this mod

2 near-identical copies found in the catalogue:

api-design-reviewer — 89% identical, 41 lines differ
api-design-reviewer — 88% identical, 48 lines differ

openclaw-skills/api-design-reviewer/SKILL.md · 432 lines

How it starts

The opening of the file, as written. The whole thing — 432 lines — stays where its author put it; the contents beside it link to each section on GitHub.

API Design Reviewer

Tier: POWERFUL
Category: Engineering / Architecture
Maintainer: Claude Skills Team

Overview

The API Design Reviewer skill provides comprehensive analysis and review of API designs, focusing on REST conventions, best practices, and industry standards. This skill helps engineering teams build consistent, maintainable, and well-designed APIs through automated linting, breaking change detection, and design scorecards.

Core Capabilities

1. API Linting and Convention Analysis

Resource Naming Conventions: Enforces kebab-case for resources, camelCase for fields
HTTP Method Usage: Validates proper use of GET, POST, PUT, PATCH, DELETE
URL Structure: Analyzes endpoint patterns for consistency and RESTful design
Status Code Compliance: Ensures appropriate HTTP status codes are used
Error Response Formats: Validates consistent error response structures
Documentation Coverage: Checks for missing descriptions and documentation gaps

2. Breaking Change Detection

Endpoint Removal: Detects removed or deprecated endpoints
Response Shape Changes: Identifies modifications to response structures
Field Removal: Tracks removed or renamed fields in API responses
Type Changes: Catches field type modifications that could break clients
Required Field Additions: Flags new required fields that could break existing integrations
Status Code Changes: Detects changes to expected status codes

3. API Design Scoring and Assessment

Consistency Analysis (30%): Evaluates naming conventions, response patterns, and structural consistency
Documentation Quality (20%): Assesses completeness and clarity of API documentation
Security Implementation (20%): Reviews authentication, authorization, and security headers
Usability Design (15%): Analyzes ease of use, discoverability, and developer experience
Performance Patterns (15%): Evaluates caching, pagination, and efficiency patterns

Read the full file on GitHub · 432 lines

Files

What ships with it

5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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.

13d ago First seen · 432 lines · 34 tokens per session scan A ed235881cfc7

Subscribe to this mod's changes

api-design-reviewer is a skill published in the GitHub repository seaworld008/Commonly-used-high-value-skills (70 stars, last pushed 5d ago), licensed MIT. It adds 34 tokens to every session and 2,972 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Backend and APIs Claude Code Code review agent ai ai-tools automation codex

read-only-gh-pr-review

Review backend pull requests for correctness, security, performance, maintainability, and test coverage using GitHub CLI plus local repository inspection. Use when asked to review service-layer/API/database changes, audit backend branch diffs, summarize backend risk, or produce actionable must-fix/should-fix feedback.

jawwadfirdousi/agent-skills · 65 tokens

api-design-reviewer