api-design

api-design is a skill for Claude Code from AnExiledDev/CodeForge. It costs 111 tokens per session (1,939 once invoked), scanned A, original, no licence file.

A guide to designing REST APIs, which are web interfaces that let programs exchange data through standard HTTP requests. It covers names for data resources, page-by-page results, errors, versions, login checks, and request limits.

In plain words
What is it for?
Use it to plan REST endpoints, pagination, API versioning, error responses, authentication, and rate limiting.
Why use it?
It helps you make API decisions consistent before implementation begins. This reduces confusion for clients and makes future changes easier to manage.

Skill for Claude Code

Written for Claude Code: effort in frontmatter.

Part of the skill-engine plugin — 23 skills shipped together

Good fit Use it to plan REST endpoints, pagination, API versioning, error responses, authentication, and rate limiting.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/anexileddev/codeforge/api-design
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 AnExiledDev/CodeForge --skill api-design
Clone the repo
git clone --depth 1 https://github.com/AnExiledDev/CodeForge

Made for: Claude Code.

Or install skill-engine, the plugin that ships this one along with the rest of its 23 skills.

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/anexileddev/codeforge/api-design/github.svg)](https://agentmods.dev/skills/anexileddev/codeforge/api-design)
Your own site
<a href="https://agentmods.dev/skills/anexileddev/codeforge/api-design"><img src="https://agentmods.dev/badge/skills/anexileddev/codeforge/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/anexileddev/codeforge/api-design"><img src="https://agentmods.dev/badge/skills/anexileddev/codeforge/api-design.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 111 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,939 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
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 $0.00111 $0.01939
Opus 5.5 $0.00044 $0.00776
Sonnet 5.5 $0.00022 $0.00388
Haiku 4.5 $0.00011 $0.00194

Measured 1mo ago against content hash 4ebebdd67e9d, 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 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 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.

Makes network callslowCapability

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

| Testing | Easy — curl/browser | Requires setting headers |
container/.devcontainer/plugins/devs-marketplace/plugins/skill-engine/skills/api-design/SKILL.md · 229 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Files

What ships with it

2 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.

  1. 1mo ago First seen · 229 lines · 111 tokens per session scan A 4ebebdd67e9d

Subscribe to this mod's changes

api-design is a skill published in the GitHub repository AnExiledDev/CodeForge (10 stars, last pushed 2mo ago), with no licence file. It adds 111 tokens to every session and 1,939 once invoked, about $0.0004 per session on Opus 5.5. 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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