diff --git a/libs/common/src/modules/client/client.repository.module.ts b/libs/common/src/modules/client/client.repository.module.ts
new file mode 100644
index 0000000..af1f3b0
--- /dev/null
+++ b/libs/common/src/modules/client/client.repository.module.ts
@@ -0,0 +1,9 @@
+import { Module } from '@nestjs/common';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { ClientEntity } from './entities';
+
+@Module({
+  imports: [TypeOrmModule.forFeature([ClientEntity])],
+  exports: [TypeOrmModule],
+})
+export class ClientRepositoryModule {}
diff --git a/src/app.module.ts b/src/app.module.ts
index f2a5bd8..3187210 100644
--- a/src/app.module.ts
+++ b/src/app.module.ts
@@ -29,11 +29,13 @@ import { RoleModule } from './role/role.module';
 import { TermsConditionsModule } from './terms-conditions/terms-conditions.module';
 import { PrivacyPolicyModule } from './privacy-policy/privacy-policy.module';
 import { TagModule } from './tags/tags.module';
+import { ClientModule } from './client/client.module';
 @Module({
   imports: [
     ConfigModule.forRoot({
       load: config,
     }),
+    ClientModule,
     AuthenticationModule,
     UserModule,
     InviteUserModule,
diff --git a/src/client/client.module.ts b/src/client/client.module.ts
new file mode 100644
index 0000000..84bc096
--- /dev/null
+++ b/src/client/client.module.ts
@@ -0,0 +1,13 @@
+import { Module } from '@nestjs/common';
+import { ClientController } from './controllers';
+import { ClientService } from './services';
+import { ClientRepositoryModule } from '@app/common/modules/client/client.repository.module';
+import { ClientRepository } from '@app/common/modules/client/repositories';
+
+@Module({
+  imports: [ClientRepositoryModule],
+  controllers: [ClientController],
+  providers: [ClientService, ClientRepository],
+  exports: [ClientService],
+})
+export class ClientModule {}
diff --git a/src/client/controllers/client.controller.ts b/src/client/controllers/client.controller.ts
new file mode 100644
index 0000000..edf22ea
--- /dev/null
+++ b/src/client/controllers/client.controller.ts
@@ -0,0 +1,15 @@
+import { Controller, Post, Body } from '@nestjs/common';
+import { ApiTags } from '@nestjs/swagger';
+import { RegisterClientDto } from '../dtos/register-client.dto';
+import { ClientService } from '../services';
+
+@ApiTags('OAuth Clients')
+@Controller('clients')
+export class ClientController {
+  constructor(private readonly clientService: ClientService) {}
+
+  @Post('register')
+  async registerClient(@Body() dto: RegisterClientDto) {
+    return this.clientService.registerClient(dto);
+  }
+}
diff --git a/src/client/controllers/index.ts b/src/client/controllers/index.ts
new file mode 100644
index 0000000..a83bab5
--- /dev/null
+++ b/src/client/controllers/index.ts
@@ -0,0 +1 @@
+export * from './client.controller';
diff --git a/src/client/dtos/index.ts b/src/client/dtos/index.ts
new file mode 100644
index 0000000..34d8bbb
--- /dev/null
+++ b/src/client/dtos/index.ts
@@ -0,0 +1,3 @@
+export * from './add.community.dto';
+export * from './project.param.dto';
+export * from './get.community.dto';
diff --git a/src/client/dtos/register-client.dto.ts b/src/client/dtos/register-client.dto.ts
new file mode 100644
index 0000000..bdcc573
--- /dev/null
+++ b/src/client/dtos/register-client.dto.ts
@@ -0,0 +1,31 @@
+import { ApiProperty } from '@nestjs/swagger';
+import { IsNotEmpty, IsString } from 'class-validator';
+
+export class RegisterClientDto {
+  @ApiProperty({
+    example: 'SmartHomeApp',
+    description: 'The name of the client',
+    required: true,
+  })
+  @IsString()
+  @IsNotEmpty()
+  name: string;
+
+  @ApiProperty({
+    example: 'https://client-app.com/callback',
+    description: 'The redirect URI of the client',
+    required: true,
+  })
+  @IsString()
+  @IsNotEmpty()
+  redirectUri: string;
+
+  @ApiProperty({
+    example: ['DEVICE_SINGLE_CONTROL', 'DEVICE_VIEW'],
+    description: 'The scopes of the client',
+    required: true,
+  })
+  @IsString({ each: true })
+  @IsNotEmpty({ each: true })
+  scopes: string[];
+}
diff --git a/src/client/services/client.service.ts b/src/client/services/client.service.ts
new file mode 100644
index 0000000..795e33a
--- /dev/null
+++ b/src/client/services/client.service.ts
@@ -0,0 +1,45 @@
+import { Injectable, NotFoundException } from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+import { Repository } from 'typeorm';
+
+import * as crypto from 'crypto';
+import { RegisterClientDto } from '../dtos/register-client.dto';
+import { ClientEntity } from '@app/common/modules/client/entities';
+
+@Injectable()
+export class ClientService {
+  constructor(
+    @InjectRepository(ClientEntity)
+    private clientRepository: Repository<ClientEntity>,
+  ) {}
+
+  async registerClient(dto: RegisterClientDto) {
+    const clientId = crypto.randomBytes(16).toString('hex');
+    const clientSecret = crypto.randomBytes(32).toString('hex');
+
+    const client = this.clientRepository.create({
+      name: dto.name,
+      clientId,
+      clientSecret,
+      redirectUri: dto.redirectUri,
+      scopes: dto.scopes,
+    });
+
+    await this.clientRepository.save(client);
+
+    return { clientId, clientSecret };
+  }
+
+  async validateClient(
+    clientId: string,
+    clientSecret: string,
+  ): Promise<ClientEntity | null> {
+    const client = await this.clientRepository.findOne({
+      where: { clientId, clientSecret },
+    });
+    if (!client) {
+      throw new NotFoundException('Invalid client credentials');
+    }
+    return client;
+  }
+}
diff --git a/src/client/services/index.ts b/src/client/services/index.ts
new file mode 100644
index 0000000..b58570a
--- /dev/null
+++ b/src/client/services/index.ts
@@ -0,0 +1 @@
+export * from './client.service';