samchon/nestia

Health v2 · maintenance only

Adoption not part of the score

2172 stars · 125 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Nestia is a set of helper libraries for NestJS that turns plain TypeScript types into runtime validation, a typed client SDK, OpenAPI/Swagger documents, e2e tests, and a mockup simulator. It also includes tooling for AI chatbot development such as MCP tool routes and LLM function calling support.

Use cases

• generate a type-safe client SDK from NestJS controllers
• replace class-validator with faster TypeScript-based runtime validation
• auto-generate Swagger/OpenAPI docs from TypeScript types
• generate e2e tests for every API endpoint automatically
• mock a backend API before the server exists
• expose NestJS methods as MCP tools for LLM clients
• build type-safe WebSocket RPC routes in NestJS

When to choose

• you use NestJS and want to stop declaring DTOs multiple times
• you want tRPC-like end-to-end type safety over plain REST
• validation performance with class-validator is a bottleneck
• you want automated e2e tests and mock servers from your API types
• you are building LLM function-calling or MCP tool servers in TypeScript

When to avoid

• your backend is not NestJS or TypeScript
• you rely heavily on class-validator decorators and existing DTO classes
• you need a framework-agnostic solution independent of the NestJS ecosystem

Facets

framework · maturity active

web-framework middleware form-handling serialization e2e-testing benchmarking api-documentation sdk mcp websocket cli backend web-development developer-tools apis large-language-models testing documentation cli cross-platform nestjs typia swagger openapi code-generation type-safe-client-sdk mockup-simulator llm-function-calling class-validator-replacement trpc-like ai-agents nodejs typescript

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