diff --git a/src/main/java/com/example/autoservice/AutoserviceApplication.java b/src/main/java/com/example/autoservice/AutoserviceApplication.java
index 7f79b5c..e6557e8 100644
--- a/src/main/java/com/example/autoservice/AutoserviceApplication.java
+++ b/src/main/java/com/example/autoservice/AutoserviceApplication.java
@@ -1,10 +1,11 @@
 package com.example.autoservice;
 
+import org.springframework.boot.CommandLineRunner;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 
 @SpringBootApplication
-public class AutoserviceApplication {
+public class AutoserviceApplication implements CommandLineRunner{
 
 	public static void main(String[] args) {
 		SpringApplication.run(AutoserviceApplication.class, args);
diff --git a/src/main/java/com/example/autoservice/clients/api/ClientsController.java b/src/main/java/com/example/autoservice/clients/api/ClientsController.java
new file mode 100644
index 0000000..70bcecc
--- /dev/null
+++ b/src/main/java/com/example/autoservice/clients/api/ClientsController.java
@@ -0,0 +1,64 @@
+package com.example.autoservice.clients.api;
+
+import java.util.List;
+
+import org.modelmapper.ModelMapper;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.example.demo.core.configuration.Constants;
+import com.example.autoservice.clients.service.ClientsService;
+import com.example.autoservice.clients.model.ClientsEntity;
+
+import jakarta.validation.Valid;
+
+@RestController
+@RequestMapping(Constants.API_URL + "/clients")
+public class ClientsController {
+    private final ClientsService clientsService;
+    private final ModelMapper modelMapper;
+
+    public DepartmentController(ClientsService clientsService, ModelMapper modelMapper) {
+        this.clientsService = clientsService;
+        this.modelMapper = modelMapper;
+    }
+
+    private ClientsDto toDto(ClientsEntity entity) {
+        return modelMapper.map(entity, ClientsDto.class);
+    }
+
+    private ClientsEntity toEntity(ClientsDto dto) {
+        return modelMapper.map(dto, ClientsEntity.class);
+    }
+
+    @GetMapping
+    public List<ClientsDto> getAll() {
+        return clientsService.getAll().stream().map(this::toDto).toList();
+    }
+
+    @GetMapping("/{id}")
+    public ClientsDto get(@PathVariable(name = "id") Long id) {
+        return toDto(clientsService.get(id));
+    }
+
+    @PostMapping
+    public ClientsDto create(@RequestBody @Valid ClientsDto dto) {
+        return toDto(clientsService.create(toEntity(dto)));
+    }
+
+    @PutMapping("/{id}")
+    public ClientsDto update(@PathVariable(name = "id") Long id, @RequestBody ClientsDto dto) {
+        return toDto(clientsService.update(id, toEntity(dto)));
+    }
+
+    @DeleteMapping("/{id}")
+    public ClientsDto delete(@PathVariable(name = "id") Long id) {
+        return toDto(clientsService.delete(id));
+    }
+}
diff --git a/src/main/java/com/example/autoservice/clients/api/ClientsDto.java b/src/main/java/com/example/autoservice/clients/api/ClientsDto.java
new file mode 100644
index 0000000..21bec1c
--- /dev/null
+++ b/src/main/java/com/example/autoservice/clients/api/ClientsDto.java
@@ -0,0 +1,62 @@
+package com.example.autoservice.clients.api;
+
+public class ClientsDto{
+    @JsonProperty(access = JsonProperty.Access.READ_ONLY)
+    private Long id;
+    @NotNull
+    private String first_name;
+    @NotNull
+    private String last_name;
+    private String middle_name;
+    private Date date_birthday;
+    @NotNull
+    private String phone_number;
+
+    public Long getId(){
+        return id;
+    }
+
+    public void setId(Long id){
+        this.id = id;
+    }
+
+    public String getFirst_Name(){
+        return first_name;
+    }
+
+    public void setFirst_Name(String first_name){
+        this.first_name = first_name;
+    }
+
+    public String getLast_Name(){
+        return last_name;
+    }
+
+    public void setLast_Name(String last_name){
+        this.last_name = last_name;
+    }
+
+    public String getMiddle_Name(){
+        return middle_name;
+    }
+
+    public void setMiddle_Name(String middle_name){
+        this.middle_name = middle_name;
+    }
+
+    public Date getDate_Birthday(){
+        return date_birthday;
+    }
+
+    public void setDate_Birthday(Date date_birthday){
+        this.date_birthday = date_birthday;
+    }
+
+    public String getPhone_Number(){
+        return phone_number;
+    }
+
+    public void setPhone_Number(String phone_number){
+        this.phone_number = phone_number;
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/com/example/autoservice/clients/model/ClientsEntity.java b/src/main/java/com/example/autoservice/clients/model/ClientsEntity.java
new file mode 100644
index 0000000..0ba6039
--- /dev/null
+++ b/src/main/java/com/example/autoservice/clients/model/ClientsEntity.java
@@ -0,0 +1,74 @@
+package com.example.autoservice.clients.model;
+
+import com.example.autoservice.core.model.BaseEntity;
+import java.util.Date;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Table;
+
+@Entity
+@Table(name = "clients")
+public class ClientsEntity extends BaseEntity{
+    @Column(nullable = false, unique = true, length = 30)
+    private String first_name;
+    @Column(nullable = false, unique = false, length = 25)
+    private String last_name;
+    @Column(nullable = false, unique = false, length = 10)
+    private String middle_name;
+    @Column(nullable = true, unique = false)
+    private Date date_birthday;
+    @Column(nullable = false, unique = true, length = 12)
+    private String phone_number;
+
+    public ClientsEntity(){
+
+    }
+
+    public ClientsEntity(String first_name, String last_name, String middle_name, Date date_birthday, String phone_number){
+        this.first_name = first_name;
+        this.last_name = last_name;
+        this.middle_name = middle_name;
+        this.date_birthday = date_birthday;
+        this.phone_number = phone_number;
+    }
+
+    public String getFirst_Name(){
+        return first_name;
+    }
+
+    public void setFirst_Name(String first_name){
+        this.first_name = first_name;
+    }
+
+    public String getLast_Name(){
+        return last_name;
+    }
+
+    public void setLast_Name(String last_name){
+        this.last_name = last_name;
+    }
+
+    public String getMiddle_Name(){
+        return middle_name;
+    }
+
+    public void setMiddle_Name(String middle_name){
+        this.middle_name = middle_name;
+    }
+
+    public Date getDate_Birthday(){
+        return date_birthday;
+    }
+
+    public void setDate_Birthday(Date date_birthday){
+        this.date_birthday = date_birthday;
+    }
+
+    public String getPhone_Number(){
+        return phone_number;
+    }
+
+    public void setPhone_Number(String phone_number){
+        this.phone_number = phone_number;
+    }
+}
diff --git a/src/main/java/com/example/autoservice/clients/repository/ClientsRepository.java b/src/main/java/com/example/autoservice/clients/repository/ClientsRepository.java
new file mode 100644
index 0000000..35bed82
--- /dev/null
+++ b/src/main/java/com/example/autoservice/clients/repository/ClientsRepository.java
@@ -0,0 +1,10 @@
+package com.example.autoservice.clients.repository;
+
+import java.util.Optional;
+
+import org.springframework.data.repository.CrudRepository;
+
+import com.example.autoservice.clients.model.ClientEntity;
+
+public interface ClientsRepository extends CrudRepository<ClientsEntity, Long> {
+}
diff --git a/src/main/java/com/example/autoservice/clients/service/ClientsService.java b/src/main/java/com/example/autoservice/clients/service/ClientsService.java
new file mode 100644
index 0000000..6a29be3
--- /dev/null
+++ b/src/main/java/com/example/autoservice/clients/service/ClientsService.java
@@ -0,0 +1,57 @@
+package com.example.autoservice.clients.service;
+
+import java.util.List;
+import java.util.stream.StreamSupport;
+
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import com.example.autoservice.clients.model.ClientsEntity;
+import com.example.autoservice.clients.repository.ClientsRepository;
+import com.example.demo.core.error.NotFoundException;
+
+@Service
+public class ClientsService {
+    private final ClientsRepository repository;
+
+    public DepartmentService(ClientsRepository repository) {
+        this.repository = repository;
+    }
+
+    @Transactional(readOnly = true)
+    public List<ClientsEntity> getAll() {
+        return StreamSupport.stream(repository.findAll().spliterator(), false).toList();
+    }
+
+    @Transactional(readOnly = true)
+    public ClientsEntity get(Long id) {
+        return repository.findById(id)
+                .orElseThrow(() -> new NotFoundException(ClientsEntity.class, id));
+    }
+
+    @Transactional
+    public ClientsEntity create(ClientsEntity entity) {
+        if (entity == null) {
+            throw new IllegalArgumentException("Entity is null");
+        }
+        return repository.save(entity);
+    }
+
+    @Transactional
+    public ClientsEntity update(Long id, ClientsEntity entity) {
+        final ClientsEntity existsEntity = get(id);
+        existsEntity.setFirst_Name(entity.getFirst_Name());
+        existsEntity.setLast_Name(entity.setLast_Name());
+        existsEntity.setMiddle_Name(entity.setMiddle_Name());
+        existsEntity.setDate_Birthday(entity.setDate_Birthday());
+        existsEntity.setPhone_Number(entity.setPhone_Number());
+        return repository.save(existsEntity);
+    }
+
+    @Transactional
+    public ClientsEntity delete(Long id) {
+        final ClientsEntity existsEntity = get(id);
+        repository.delete(existsEntity);
+        return existsEntity;
+    }
+}