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api-and-interface-design
Guides stable API and interface design. Use when designing APIs, module boundaries, or any public interface. Use when creating REST or GraphQL endpoints, defining type contracts between modules, or establishing boundaries between frontend a
- License
- MIT
- SKILL.md tokens
- 3,702
- Bundled files
- 0
- Bundled tokens (estimated)
- 0
Cost per 1,000 loads
Estimated input cost per 1,000 loads of SKILL.md only (characters ÷ 4). Bundled files, output tokens and execution are excluded.
| Model | Input / 1M tokens | 1,000 loads |
|---|---|---|
| Claude Opus 5 | $5.00 | $18.51 |
| Claude Sonnet 5 | $2.00 | $7.40 |
| Claude Haiku 4.5 | $1.00 | $3.70 |
Safety flags
Detected automatically from files; not a security audit.
- Runs scripts
- No
- Network access
- No
- Shell commands
- No
Works with
Open SKILL.md format
- Claude Code
- Codex
- Cursor
- GitHub Copilot
- Gemini CLI
- OpenCode
- Goose
Install
npx skills add addyosmani/agent-skills --skill api-and-interface-designLast verified:
api-and-interface-design FAQ
What does the api-and-interface-design skill do?
Guides stable API and interface design. Use when designing APIs, module boundaries, or any public interface. Use when creating REST or GraphQL endpoints, defining type contracts between modules, or establishing boundaries between frontend a Source: https://github.com/addyosmani/agent-skills/blob/main/skills/api-and-interface-design/SKILL.md
What does the api-and-interface-design skill cost to load?
SKILL.md is about 3,702 tokens. Estimated input cost per 1,000 loads: Claude Opus 5 $18.51; Claude Sonnet 5 $7.40; Claude Haiku 4.5 $3.70. Estimated input cost per 1,000 loads of SKILL.md only (characters ÷ 4). Bundled files, output tokens and execution are excluded. Prices: https://docs.anthropic.com/en/docs/about-claude/pricing
How do I install the api-and-interface-design skill?
Skills CLI: npx skills add addyosmani/agent-skills --skill api-and-interface-design. Claude Code: /plugin marketplace add addyosmani/agent-skills, then install the plugin from that marketplace. Download the api-and-interface-design skill folder as a ZIP and upload it in Claude.ai skills settings.
Is the api-and-interface-design skill safe?
No runs-scripts, network-access or shell-command flags were detected. Flags are detected automatically from the skill's files and are not a security audit; review the SKILL.md before installing.