Error endpoit request

Question

Hello, I created a node API with nest but I'm having problems accessing the endpoints after publishing it on the webapp via code, it always returns

Cannot GET /swagger

Does anyone know what settings I need to make for it to work?

Answer 1

Hi @Robson Kretzmann,

welcome to the Microsoft Q&A Platform!

To fix the Cannot GET /swagger error in your NestJS application after deployment, can you cross check with your main.ts file

Ensure Swagger is set up in main.ts: Make sure you have the following Swagger setup in your main.ts file:

import { NestFactory } from '@nestjs/core';
import { DocumentBuilder, SwaggerModule } from '@nestjs/swagger';
import { AppModule } from './app.module';
async function bootstrap() {
  const app = await NestFactory.create(AppModule);
  const config = new DocumentBuilder()
    .setTitle('API Docs')
    .setDescription('API description')
    .setVersion('1.0')
    .build();
  const document = SwaggerModule.createDocument(app, config);
  SwaggerModule.setup('swagger', app, document); // URL: /swagger
  await app.listen(process.env.PORT || 3000); // Ensure correct port is used
}
bootstrap();

Deploy the API with this setup: Redeploy your NestJS API ensuring the above SwaggerModule.setup('swagger', ...) is included in main.ts.

Access the Swagger URL: After deployment, access https://your-domain/swagger to see your API documentation.

This will resolve your Cannot GET /swagger

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