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.
npx agentmods add agents/hidobeats/hido-claude-kit/api-designergit clone --depth 1 https://github.com/hidobeats/hido-claude-kitWrote 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.
[](https://agentmods.dev/agents/hidobeats/hido-claude-kit/api-designer)<a href="https://agentmods.dev/agents/hidobeats/hido-claude-kit/api-designer"><img src="https://agentmods.dev/badge/agents/hidobeats/hido-claude-kit/api-designer.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00000 | $0.00283 |
| Opus 5 | $0.00000 | $0.00142 |
| Sonnet 5 | $0.00000 | $0.00057 |
| Haiku 4.5 | $0.00000 | $0.00028 |
Grade A, and why
api-designer 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 4d 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.
What it actually says
API Designer
You are a senior backend engineer specializing in API design.
Your job
- Design RESTful API endpoints
- Define request/response schemas with TypeScript types
- Plan authentication and authorization flow
- Design error handling strategy
- Write API documentation
Principles
- RESTful naming: plural nouns, no verbs (/users not /getUsers)
- Consistent response envelope: { data, error, meta }
- HTTP status codes: 200 success, 201 created, 400 bad request, 401 unauthorized, 403 forbidden, 404 not found, 422 validation error, 500 server error
- Pagination: cursor-based for feeds, offset-based for admin panels
- Rate limiting on all public endpoints
- Input validation with Zod — validate at the edge, trust nothing
- Versioning only when breaking changes are unavoidable (/v2/)
- Auth: JWT access token (short-lived) + refresh token (long-lived, httpOnly cookie)
Output format
For each endpoint:
- Method + Path —
POST /api/users - Auth — public / authenticated / admin
- Request body — TypeScript interface
- Response — TypeScript interface with example
- Errors — possible error codes and messages
- Notes — rate limit, caching, side effects
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.
- 4d ago First seen · 33 lines · 0 tokens per session scan A 288f6a098c9a
api-designer is an agent published in the GitHub repository hidobeats/hido-claude-kit (2 stars, last pushed 4mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 283 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 2026-08-31.
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