jsontosdk

Paste a JSON sample → production-grade TypeScript interfaces + Zod schema, in ~2 seconds. LLM-named (no _C, _C1, _C2), no signup, the URL is shareable.

Live: https://jsontosdk.vercel.app

Why

quicktype produces unreadable type names. ChatGPT works but the result lives in a chat — there's no permanence and no shareable URL. OpenAPI codegen only works when the upstream publishes a spec, which most small SaaS, partner APIs, internal endpoints, and MCP-server resource shapes don't.

jsontosdk is the LLM-first take: paste → typed SDK, named like a human wrote it.

How it works

1. Paste one JSON response (≤ 100 KB).
2. The server (Astro endpoint on Vercel) forwards it to Claude Haiku 4.5 with a strict system prompt that produces:
   • types.ts — export interface declarations, PascalCase, child-first ordered, with comment hints for ISO dates / URLs / emails.
   • schema.ts — matching Zod schema, mirrors the interfaces.
3. The result is rendered in two copy-buttoned panels.
4. The paste is encoded into #payload=<base64> so the URL is shareable.

v1 limits

• One sample per call (multi-sample union inference is v2).
• TypeScript + Zod only (Pydantic / Go / Rust are v3+).
• 100 KB input cap, 20 generations / hour / IP.
• No signup, no account, no DB.

Local dev

cd code
npm install
ANTHROPIC_API_KEY=sk-ant-... npm run dev

Stack

• Astro 5 (server output) on Vercel serverless
• @anthropic-ai/sdk calling claude-haiku-4-5
• Vanilla JS, no framework on the page
• In-memory IP rate limit (resets per cold start — fine for v1)

License

MIT