api-design

api-design is a skill for Claude Code, Codex from aws-samples/serverless-samples. It costs 0 tokens per session (530 once invoked), scanned A, original, MIT-0.

An API change reviewer that checks proposed interfaces against the Acme API style guide, REST conventions, and backward-compatibility needs. APIs are the agreed ways that software systems communicate.

In plain words
What is it for?
Review new or modified API endpoints, check REST-style consistency, and identify compatibility risks.
Why use it?
It helps catch inconsistent API designs and changes that could break existing clients.

Skill for Claude CodeCodex ✓ vendor

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit Review new or modified API endpoints, check REST-style consistency, and identify compatibility risks.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/aws-samples/serverless-samples/api-design
About the project

aws-samples/serverless-samples is a collection of example code for serverless applications, where cloud services run application logic without developers managing servers directly. It helps developers learn how to build applications using services such as API Gateway and Lambda.

aws-samples/serverless-samples · 350 stars · on GitHub

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 aws-samples/serverless-samples --skill api-design
Clone the repo
git clone --depth 1 https://github.com/aws-samples/serverless-samples

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.

agentmods badge for api-design

README.md
[![agentmods](https://agentmods.dev/badge/skills/aws-samples/serverless-samples/api-design/github.svg)](https://agentmods.dev/skills/aws-samples/serverless-samples/api-design)
Your own site
<a href="https://agentmods.dev/skills/aws-samples/serverless-samples/api-design"><img src="https://agentmods.dev/badge/skills/aws-samples/serverless-samples/api-design/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.

agentmods 80×15 button for api-design

Your own site · 80×15
<a href="https://agentmods.dev/skills/aws-samples/serverless-samples/api-design"><img src="https://agentmods.dev/badge/skills/aws-samples/serverless-samples/api-design.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 530 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 warn 7 Sept 2026
SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium MCP Rug Pull · line 38
    npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.
    Fix: Pin the version: npx @scope/[email protected]
How audits are shown
Origin unknown 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 5.1 $0.00000 $0.00530
Opus 5.5 $0.00000 $0.00212
Sonnet 5.5 $0.00000 $0.00106
Haiku 4.5 $0.00000 $0.00053

Measured 1mo ago against content hash a33aea4dba73, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

api-design 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 1mo 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.

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.

claude-hub/examples/teams/api/skills/api-design/SKILL.md · 48 lines

The source is not reproduced here

Licensed MIT-0

The repository is licensed MIT-0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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. 1mo ago First seen · 48 lines · 0 tokens per session scan A a33aea4dba73

Subscribe to this mod's changes

api-design is a skill published in the GitHub repository aws-samples/serverless-samples (350 stars, last pushed today), licensed MIT-0. It costs nothing until one of its globs matches a file; then it loads 530 tokens. 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.

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