Is the API Design Patterns skill free?

Yes. The skill itself is free from AsyrafHussin/agent-skills. SkillProof publishes the install command and an independent test verdict at no cost.

What is the API Design Patterns SkillProof Score?

9.6/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 9/10, docs & honesty 5/5.

How do I install API Design Patterns?

Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.

Can I use API Design Patterns with Cursor, Copilot, Gemini CLI, Codex or other AI tools?

The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.

API Design Patterns

38 rules for REST endpoint naming, errors, pagination, versioning, and API security.

by AsyrafHussin · AsyrafHussin/agent-skills

Tested · Works

Install — copy the command Download source ↗

Test report

Verdict: Tested · Works
Score: 9.6/10
Tested: Jul 14, 2026
Environment: Claude Code 2.x (agent harness)
Upstream re-checked: Aug 10, 2026 · 32945d2

Ran a real 'invoices API' redesign through it: the skill turned verb-based URLs (POST /createInvoice) into proper nouns, replaced a bare error string with a structured envelope (code/message/details/request_id), and added cursor-pagination metadata plus HATEOAS links the naive baseline never had.

Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works

Installs cleanly 5/5
Triggers reliably 5/5
Output vs. baseline 9/10
Docs & honesty 5/5

What API Design Patterns does

A condensed rulebook (38 rules / 7 categories) for RESTful API design, covering resource naming, error-response shape, pagination, versioning, and auth. Triggers when designing or reviewing endpoints, or writing error-handling/pagination code, and hands off to per-rule files (rules/*.md) and a 7,200-line compiled AGENTS.md for deep dives.

How to install API Design Patterns

git clone https://github.com/AsyrafHussin/agent-skills
cd agent-skills
mkdir -p ~/.claude/skills
cp -r skills/api-design-patterns ~/.claude/skills/api-design-patterns

Skills live in ~/.claude/skills/ (global) or .claude/skills/ (per-project). Restart Claude Code after installing.

Commands — how to trigger API Design Patterns

/api-design-patterns 38 rules for REST endpoint naming, errors, pagination, versioning, and API security.

It also activates on plain-language prompts like these:

Design a REST API for user management with proper error handling
Review my API endpoints for best practices before we ship
What HTTP status codes should I use for this validation error?

Frequently asked questions

Is the API Design Patterns skill free?: Yes. The skill itself is free from AsyrafHussin/agent-skills. SkillProof publishes the install command and an independent test verdict at no cost.
Does API Design Patterns work with Claude Code?: We tested it with Claude Code 2.x (agent harness) on Jul 14, 2026. Verdict: Tested · Works. Ran a real 'invoices API' redesign through it: the skill turned verb-based URLs (POST /createInvoice) into proper nouns, replaced a bare error string with a structured envelope (code/message/details/request_id), and added cursor-pagination metadata plus HATEOAS links the naive baseline never had.
What is the API Design Patterns SkillProof Score?: 9.6/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 9/10, docs & honesty 5/5.
How do I install API Design Patterns?: Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
Can I use API Design Patterns with Cursor, Copilot, Gemini CLI, Codex or other AI tools?: The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.