Overview

@nest-openapi/validator Automatically validates request/response using your OpenAPI 3.x spec.

Spec‑driven — The OpenAPI spec is the contract; validation is generated from it.
Fast by Design — AJV under the hood, with caching and optional pre-compilation.
NestJS‑native — Auto validates with per‑route opt‑out and overrides.

Install

bash

npm i @nest-openapi/validator

Quick Start

typescript

// app.module.ts
import { OpenAPIValidatorModule } from "@nest-openapi/validator";
import * as openApiSpec from "./openapi.json";

@Module({
  imports: [
    OpenAPIValidatorModule.forRoot({
      specSource: { type: "object", spec: openApiSpec },
    }),
  ],
})
export class AppModule {}

That's it! All routes automatically validated.