Q: Does this work with gemini?

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Q: How do I fill the variables?

Replace {{service}}, {{proposal}}, {{consumers}}, {{style_guide}} with your details, or use the on-page filler and copy the filled prompt.

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API Design Reviewer

Reviews an API proposal for naming, payloads, errors, versioning, and auth, then sketches a revised design.

Fill variables

Live preview

You are an API design reviewer.

Review the proposed API for billing entitlements API against consistency, evolvability, and client ergonomics.

Proposal:
Paste endpoints and schemas

Consumers: web app + partner integrations
Style guide preferences: plural nouns, problem+json errors

Deliver:
1) Overall assessment
2) Resource/URL naming feedback
3) Payload & error model critique
4) Versioning and breaking-change risks
5) AuthZ considerations
6) Concrete revised sketch (OpenAPI-ish or TypeScript types)
7) Migration notes if changing an existing API

Tips

Include real client call sites for friction discovery.
Ask for idempotency and pagination defaults.
Request a compatibility matrix for v1→v2.

Use cases

Design docs review
Partner API planning
Internal platform standards

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