# samchon/nestia

NestJS Helper + AI Chatbot Development

Repository: https://github.com/samchon/nestia
Canonical: https://ross.abutalabs.com/products/nestia
Homepage: https://nestia.io/
Language: TypeScript
License: MIT
License Family: permissive
Topics: nestjs, sdk, api, typescript, swagger, validator, class-validator, decorator, typia, trpc, hacktoberfest, agent, ai, large-language-model, llm, llm-function-calling, rag, retrieval-augmented-generation
Last push: 2026-08-25T11:38:29+00:00

## Health v2 (maintenance only)
Score: 95/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 99, release rhythm 87, longevity 100
- inputs: {"age_days": 2051, "days_push": 8, "days_rel": 8, "gap_med": 4.0, "n_releases_24m": 79}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2172, forks 125 (observed 2026-08-28T04:06:21.834673+00:00)

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

## Member repositories
- samchon/nestia (main) score 95

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:21.834673+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:49:14.017940+00:00, confidence not recorded.
  - readme: https://github.com/samchon/nestia (fetched 2026-08-28T04:06:21.834673+00:00, sha a8e4c53c9443)
  - homepage: https://nestia.io/ (fetched 2026-08-29T10:29:44.241025+00:00, sha 0a7190551957)
  - site_page: https://nestia.io/docs (fetched 2026-08-29T10:29:44.250099+00:00, sha 822160386fec)
  - site_page: https://nestia.io/docs/setup (fetched 2026-08-29T10:29:44.252252+00:00, sha 34cd14e5de4c)
  - site_page: https://nestia.io/docs/core/WebSocketRoute (fetched 2026-08-29T10:29:44.254223+00:00, sha 654c15083b28)
  - site_page: https://nestia.io/docs/core/McpRoute (fetched 2026-08-29T10:29:44.256224+00:00, sha 58f44c8694c3)
  - site_page: https://nestia.io/docs/core/TypedRoute (fetched 2026-08-29T10:29:44.258126+00:00, sha 3eed0bd25eeb)
  - site_page: https://nestia.io/docs/core/TypedBody (fetched 2026-08-29T10:29:44.260012+00:00, sha 6a5ee564fc41)
  - site_page: https://nestia.io/docs/core/PlainBody (fetched 2026-08-29T10:29:44.261844+00:00, sha 0b4cfee8d45d)
  - site_page: https://nestia.io/docs/core/TypedParam (fetched 2026-08-29T10:29:44.263480+00:00, sha 760ff677f742)
- Data as of 2026-08-30T08:39:29.467469+00:00.