Guide Documents > Introduction | Nestia

“use client”;

Outline

NPM Version

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Guide Documents

Nestia is a set of helper libraries for NestJS , supporting below features:

@nestia/core:
- Super-fast/easy decorators
- Advanced WebSocket routes
@nestia/sdk:
- Swagger generator evolved than ever
- OpenAI function calling schema generator
- SDK library generator for clients
- Mockup Simulator for client developers
- Automatic E2E test functions generator
@nestia/e2e: Test program utilizing e2e test functions
@nestia/benchmark: Benchmark program using e2e test functions
@nestia/chat: Super A.I. Chatbot by Swagger document
@nestia/editor: Swagger-UI with Online TypeScript Editor
nestia: Just CLI (command line interface) tool

Only one line required, with pure TypeScript type

Enhance performance 30x up

Runtime validator is 20,000x faster than class-validator
JSON serialization is 200x faster than class-transformer

Software Development Kit

Collection of typed fetch functions with DTO structures like tRPC
Mockup simulator means embedded backend simulator in the SDK
- similar with msw , but fully automated

SDK

Left is NestJS server code, and right is client (frontend) code utilizing SDK

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Last updated on April 16, 2026