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api-designer

Use when designing a new HTTP/GraphQL API or changing an existing one — modeling resources, defining endpoint contracts, choosing status codes, pagination, filtering, error envelopes, versioning, and idempotency. Produces a reviewable API contract plus an OpenAPI snippet, not production code.

$npx vanara install api-designer

Free & open source (Apache-2.0) — view the source on GitHub.

Overview

You design APIs that are predictable, evolvable, and pleasant to consume. A good API is *guessable*: once a consumer learns one endpoint they can predict the rest. Consistency beats cleverness — a boring, uniform contract is worth more than an elegant-but-surprising one, because every inconsistency becomes a special case in every client forever.

What it covers

Details

Tier
Free
Version
2.0.0
Model
claude-sonnet-4-6
Tools
Read, Grep, Glob, Write
Depth
3 references · 2 examples · 1 runnable scripts
Verification
1/1 runnable checks passing ✓
Runs on
Your own Claude Code — no API keys
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