diff --git a/src/passcode/dto/input/devolucion.dto.ts b/src/passcode/dto/input/devolucion.dto.ts
new file mode 100644
index 0000000..5fbf23c
--- /dev/null
+++ b/src/passcode/dto/input/devolucion.dto.ts
@@ -0,0 +1,6 @@
+import { IsInt } from 'class-validator';
+
+export class DevolucionDto {
+  @IsInt()
+  passcode: number;
+}
diff --git a/src/passcode/dto/input/notificacion.dto.ts b/src/passcode/dto/input/notificacion.dto.ts
new file mode 100644
index 0000000..b758b22
--- /dev/null
+++ b/src/passcode/dto/input/notificacion.dto.ts
@@ -0,0 +1,9 @@
+import { IsInt } from 'class-validator';
+
+export class NotificacionDto {
+  @IsInt()
+  passcode: number;
+
+  @IsInt()
+  estatus: number;
+}
diff --git a/src/passcode/dto/input/prestamo.dto.ts b/src/passcode/dto/input/prestamo.dto.ts
new file mode 100644
index 0000000..b7fdc8a
--- /dev/null
+++ b/src/passcode/dto/input/prestamo.dto.ts
@@ -0,0 +1,9 @@
+import { IsString } from 'class-validator';
+
+export class PrestamoDto {
+  @IsString()
+  passcode: string;
+
+  @IsString()
+  id_locker: string;
+}
diff --git a/src/passcode/dto/output/devolucion.dto.ts b/src/passcode/dto/output/devolucion.dto.ts
new file mode 100644
index 0000000..f43d3c3
--- /dev/null
+++ b/src/passcode/dto/output/devolucion.dto.ts
@@ -0,0 +1,6 @@
+import { Expose } from 'class-transformer';
+
+export class DevolucionOutputDto {
+  @Expose()
+  code;
+}
diff --git a/src/passcode/dto/output/notificacion.dto.ts b/src/passcode/dto/output/notificacion.dto.ts
new file mode 100644
index 0000000..7488eea
--- /dev/null
+++ b/src/passcode/dto/output/notificacion.dto.ts
@@ -0,0 +1,6 @@
+import { Expose } from 'class-transformer';
+
+export class NotificacionOutputDto {
+  @Expose()
+  code;
+}
diff --git a/src/passcode/dto/output/passcode.dto.ts b/src/passcode/dto/output/passcode.dto.ts
new file mode 100644
index 0000000..4b6e658
--- /dev/null
+++ b/src/passcode/dto/output/passcode.dto.ts
@@ -0,0 +1,15 @@
+import { Expose } from 'class-transformer';
+
+export class PasscodeOutputDto {
+  @Expose()
+  code;
+
+  @Expose()
+  passcode;
+
+  @Expose()
+  id_locker;
+
+  @Expose()
+  door;
+}
diff --git a/src/passcode/entity/passcode.entity.ts b/src/passcode/entity/passcode.entity.ts
new file mode 100644
index 0000000..7056beb
--- /dev/null
+++ b/src/passcode/entity/passcode.entity.ts
@@ -0,0 +1,26 @@
+import {
+  Column,
+  Entity,
+  JoinColumn,
+  OneToOne,
+  PrimaryGeneratedColumn,
+} from 'typeorm';
+import { Prestamo } from '../../prestamo/entity/prestamo.entity';
+
+@Entity()
+export class Passcode {
+  @PrimaryGeneratedColumn()
+  id_passcode: number;
+
+  @Column({ type: String, nullable: false })
+  passcode: string;
+
+  @Column({ type: Boolean, nullable: true, default: false })
+  abrio: boolean;
+
+  @OneToOne(() => Prestamo, (Prestamo) => Prestamo.id_prestamo, {
+    eager: true,
+  })
+  @JoinColumn({ name: 'id_prestamo' })
+  prestamo: Prestamo;
+}
diff --git a/src/passcode/passcode.controller.spec.ts b/src/passcode/passcode.controller.spec.ts
new file mode 100644
index 0000000..9a58392
--- /dev/null
+++ b/src/passcode/passcode.controller.spec.ts
@@ -0,0 +1,18 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { PasscodeController } from './passcode.controller';
+
+describe('PasscodeController', () => {
+  let controller: PasscodeController;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      controllers: [PasscodeController],
+    }).compile();
+
+    controller = module.get<PasscodeController>(PasscodeController);
+  });
+
+  it('should be defined', () => {
+    expect(controller).toBeDefined();
+  });
+});
diff --git a/src/passcode/passcode.controller.ts b/src/passcode/passcode.controller.ts
new file mode 100644
index 0000000..9f8d987
--- /dev/null
+++ b/src/passcode/passcode.controller.ts
@@ -0,0 +1,109 @@
+import {
+  Body,
+  Controller,
+  Get,
+  Put,
+  Query,
+  Request,
+  UseGuards,
+} from '@nestjs/common';
+import {
+  ApiBearerAuth,
+  ApiBody,
+  ApiOperation,
+  ApiQuery,
+  ApiTags,
+} from '@nestjs/swagger';
+import { AuthGuard } from '@nestjs/passport';
+import { Serealize } from '../interceptors/serialize.interceptor';
+import { ValidarUsuarioService } from '../validar-usuario/validar-usuario.service';
+import { DevolucionDto } from './dto/input/devolucion.dto';
+import { DevolucionOutputDto } from './dto/output/devolucion.dto';
+import { PasscodeService } from './passcode.service';
+import { NotificacionDto } from './dto/input/notificacion.dto';
+import { NotificacionOutputDto } from './dto/output/notificacion.dto';
+import { Operador } from '../operador/entity/operador.entity';
+import { PrestamoDto } from './dto/input/prestamo.dto';
+import { PasscodeOutputDto } from './dto/output/passcode.dto';
+
+@Controller('passcode')
+@ApiTags('passcode')
+export class PasscodeController {
+  constructor(
+    private passcodeService: PasscodeService,
+    private validarUsuarioService: ValidarUsuarioService,
+  ) {}
+
+  @Serealize(PasscodeOutputDto)
+  @Get('prestamo')
+  @UseGuards(AuthGuard('jwt'))
+  @ApiOperation({
+    description: 'Endpoint que verifica la existencia y validez del passcode.',
+  })
+  @ApiBearerAuth('jwt')
+  @ApiQuery({
+    description: 'Passcode del préstamo',
+    name: 'passcode',
+    type: 'string',
+  })
+  @ApiQuery({
+    description: 'id_locker, un locker hace referencia a un carrito.',
+    name: 'id_locker',
+    type: 'string',
+  })
+  prestamo(@Request() req, @Query() query: PrestamoDto) {
+    const operador: Operador = req.user.operador;
+
+    this.validarUsuarioService.validarAdminOperador(operador);
+    return this.passcodeService.findByPasscode(
+      query.passcode,
+      false,
+      query.id_locker,
+    );
+  }
+
+  @Serealize(NotificacionOutputDto)
+  @Put('notificacion')
+  @UseGuards(AuthGuard('jwt'))
+  @ApiOperation({
+    description:
+      'Endpoint que actualiza el status del equipo a "En uso" por medio del autoprestamo.',
+  })
+  @ApiBearerAuth('jwt')
+  @ApiBody({
+    description: 'Ambas variables son obligatorias.',
+    examples: { ejemplo: { value: { passcode: 123456789012, estatus: 1 } } },
+  })
+  autoprestamo(@Request() req, @Body() body: NotificacionDto) {
+    const operador: Operador = req.user.operador;
+    this.validarUsuarioService.validarAdminOperador(operador);
+
+    return this.passcodeService.entregarEquipo(
+      body.passcode,
+      body.estatus,
+      operador,
+    );
+  }
+
+  @Serealize(DevolucionOutputDto)
+  @Put('devolucion')
+  @UseGuards(AuthGuard('jwt'))
+  @ApiOperation({ description: 'Endpoint que da por terminado un préstamo.' })
+  @ApiBearerAuth('jwt')
+  @ApiBody({
+    description: 'Solo necesitamos el passcode.',
+    examples: {
+      ejemplo: {
+        value: {
+          passcode: 123456789012,
+        },
+      },
+    },
+  })
+  devolucion(@Request() req, @Body() body: DevolucionDto) {
+    const operador: Operador = req.user.operador;
+
+    this.validarUsuarioService.validarAdminOperador(operador);
+    return this.passcodeService.devolverEquipo(body.passcode, operador);
+  }
+}
diff --git a/src/passcode/passcode.module.ts b/src/passcode/passcode.module.ts
new file mode 100644
index 0000000..6a3f4de
--- /dev/null
+++ b/src/passcode/passcode.module.ts
@@ -0,0 +1,19 @@
+import { forwardRef, Module } from '@nestjs/common';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { PasscodeController } from './passcode.controller';
+import { PasscodeService } from './passcode.service';
+import { Passcode } from './entity/passcode.entity';
+import { PrestamoModule } from '../prestamo/prestamo.module';
+import { ValidarUsuarioModule } from '../validar-usuario/validar-usuario.module';
+
+@Module({
+  imports: [
+    forwardRef(() => PrestamoModule),
+    TypeOrmModule.forFeature([Passcode]),
+    ValidarUsuarioModule,
+  ],
+  controllers: [PasscodeController],
+  providers: [PasscodeService],
+  exports: [PasscodeService],
+})
+export class PasscodeModule {}
diff --git a/src/passcode/passcode.service.spec.ts b/src/passcode/passcode.service.spec.ts
new file mode 100644
index 0000000..89747df
--- /dev/null
+++ b/src/passcode/passcode.service.spec.ts
@@ -0,0 +1,18 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { PasscodeService } from './passcode.service';
+
+describe('PasscodeService', () => {
+  let service: PasscodeService;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [PasscodeService],
+    }).compile();
+
+    service = module.get<PasscodeService>(PasscodeService);
+  });
+
+  it('should be defined', () => {
+    expect(service).toBeDefined();
+  });
+});
diff --git a/src/passcode/passcode.service.ts b/src/passcode/passcode.service.ts
new file mode 100644
index 0000000..1d41818
--- /dev/null
+++ b/src/passcode/passcode.service.ts
@@ -0,0 +1,111 @@
+import {
+  BadRequestException,
+  forwardRef,
+  Inject,
+  Injectable,
+} from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+import { Repository } from 'typeorm';
+import { Passcode } from './entity/passcode.entity';
+import { PrestamoService } from '../prestamo/prestamo.service';
+
+@Injectable()
+export class PasscodeService {
+  constructor(
+    @InjectRepository(Passcode) private repository: Repository<Passcode>,
+    @Inject(forwardRef(() => PrestamoService))
+    private prestamoService: PrestamoService,
+  ) {}
+
+  crearPasscode(id_carrito, id_prestamo) {
+    const prestamo = {
+      1: '00000',
+      2: '0000',
+      3: '000',
+      4: '00',
+      5: '0',
+    };
+    const passcode =
+      id_carrito +
+      prestamo[id_prestamo.length] +
+      id_prestamo +
+      Math.floor(Math.random() * 99999 + 10000).toString();
+
+    this.repository.save(
+      this.repository.create({
+        passcode,
+        prestamo: { id_prestamo },
+      }),
+    );
+    return passcode;
+  }
+
+  async devolverEquipo(passcode, operador) {
+    const passcodeInterno = await this.findByPasscode(passcode, true);
+
+    // return this.prestamoService
+    //   .regresarIdPrestamo(
+    //     operador.id_operador,
+    //     passcodeInterno.prestamo.id_prestamo,
+    //   )
+    //   .then((_) => {
+    //     return { code: 1 };
+    //   });
+  }
+
+  async entregarEquipo(passcode, estatus, operador) {
+    const passcodeInterno = await this.findByPasscode(passcode, false);
+    if (estatus) {
+      if (passcodeInterno.abrio != estatus)
+        passcodeInterno.abrio = estatus === 1 ? true : false;
+      // return this.prestamoService
+      //   .entregar(passcodeInterno.prestamo.id_prestamo, operador.id_operador)
+      //   .then((_) => {
+      //     return this.repository.save(passcodeInterno).then((_) => {
+      //       return { code: 1 };
+      //     });
+      //   });
+    }
+  }
+
+  findByPasscode(passcode: string, abrio?: boolean, id_locker?: string) {
+    let door = '';
+
+    return this.repository
+      .findOne({ where: { passcode, abrio } })
+      .then(async (passcode) => {
+        if (!passcode)
+          throw new BadRequestException({
+            message: `Este passcode no existe`,
+            code: 6,
+          });
+        if (id_locker) {
+          await this.prestamoService
+            .findById(passcode.prestamo.id_prestamo)
+            .then((prestamo) => {
+              if (prestamo.equipo.carrito.id_carrito != parseInt(id_locker))
+                throw new BadRequestException({
+                  message: `El id_locker no corresponde`,
+                  code: 4,
+                });
+              door = prestamo.equipo.equipo.substring(1, 3);
+            });
+          return { ...passcode, code: 1, id_locker, door: parseInt(door) };
+        }
+        return passcode;
+      });
+  }
+
+  findPasscode(id_prestamo: number) {
+    return this.repository
+      .findOne({ where: { prestamo: { id_prestamo } } })
+      .then(async (passcode) => {
+        if (!passcode)
+          throw new BadRequestException({
+            message: `Este passcode no existe`,
+            code: 6,
+          });
+        return passcode.passcode;
+      });
+  }
+}