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API Architect (Free Gateway)
by GarphenGate
A 12-point rigorous audit for API endpoints to catch permanent design mistakes before they ship.
Free
See it in action
You say
Review this endpoint: POST /v1/orders. It takes a customer_id and a list of items. Returns 200 on success. No pagination or idempotency keys mentioned in the draft.
Your agent does
API REVIEW: POST /v1/orders — verdict: redesign Fails: 6 (no pagination), 7 (missing idempotency), 3 (failure cases unspecified), 11 (no examples) Flags: 8 (timestamps not defined) The one fix that matters most: Define idempotency keys to prevent duplicate orders.
About this skill
The problem
API mistakes become permanent the moment a consumer depends on them. Most developers rely on vibes during code reviews rather than a rigorous standard for naming, error handling, and future-proofing.
What it does
- Evaluates endpoints against 12 critical design questions covering idempotency, pagination, and naming.
- Identifies specific failures in error response shapes and status codes.
- Verifies if types, units, and timezones are explicitly defined rather than implied.
- Provides a structured verdict card with a single "must-fix" priority and a clear ship/fix/redesign status.
- Automatically degrades to a core 4-point check when only a route name is provided.
Why this beats prompting it yourself
This skill enforces evidence-based reviews over intent-based assumptions. It prevents "rubber-stamping" by requiring specific evidence for every pass and triggers a redesign verdict automatically if more than three core failures are detected.
Use cases
- Run a final gate check on a pull request before merging API changes.
- Audit existing legacy endpoints to document technical debt and breaking changes.
- Validate new API designs during the RFC or contract-drafting phase.
- Standardize API review quality across a distributed engineering team.
Known limitations
Requires a design, contract, or diff for a full 12-point audit. If only a route name is provided, it can only perform a partial assessment.
How to install
Drop the file into your AI Agent. Works with Claude, Cursor, ChatGPT, and 20+ more.
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Creator
20 skills on Agensi
GarphenGate is an AI and cybersecurity company, but you'll find us building all kinds of things whatever solves a real problem. The security background still shows up in how we work everything we release is tested properly, documented clearly, and built like someone is actually going to depend on it.
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