typed-api-spec

TypeScript based declarative API specification and zero-runtime client

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All you need is TypeScript
typed-api-spec's API definition schema is built on top of TypeScript, so you can use the full power of the type system
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type-safe, zero-runtime client
typed-api-spec provides type-safe, 0kb bundle size API client. You can use it with zero-runtime, zero-overhead, zero-dependency and zero-learning-cost (because it is just fetch!).
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Framework-agnostic
typed-api-spec does not require any other dependencies. It supports server frameworks(e.g. Express, Fastify) and validation libraries)(e.g. zod, valibot), but these are optional and you can use only those you need.

All you need is TypeScript