diff --git a/src/main/java/_11/asktpk/artisanconnectbackend/controller/ArtisanConnectController.java b/src/main/java/_11/asktpk/artisanconnectbackend/controller/ArtisanConnectController.java
index 1b92030..c4e31d2 100644
--- a/src/main/java/_11/asktpk/artisanconnectbackend/controller/ArtisanConnectController.java
+++ b/src/main/java/_11/asktpk/artisanconnectbackend/controller/ArtisanConnectController.java
@@ -1,7 +1,7 @@
 package _11.asktpk.artisanconnectbackend.controller;
 
-import _11.asktpk.artisanconnectbackend.entities.Notice;
-import _11.asktpk.artisanconnectbackend.repository.ClientRepository;
+import _11.asktpk.artisanconnectbackend.dto.ClientDTO;
+import _11.asktpk.artisanconnectbackend.service.ClientService;
 import _11.asktpk.artisanconnectbackend.service.NoticeService;
 import _11.asktpk.artisanconnectbackend.dto.NoticeDTO;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -19,8 +19,9 @@ import static org.springframework.web.servlet.function.ServerResponse.status;
 public class ArtisanConnectController {
     @Autowired
     private NoticeService noticeService;
+
     @Autowired
-    private ClientRepository clientRepository;
+    private ClientService clientService;
 
     @GetMapping("/notices/all")
     public List<NoticeDTO> getAllNotices() {
@@ -29,7 +30,7 @@ public class ArtisanConnectController {
 
     @PostMapping("/notices/add")
     public ResponseEntity<String> addNotice(@RequestBody NoticeDTO dto) {
-        if (!clientRepository.existsById(dto.getClientId())) {
+        if (!clientService.getByID(dto.getClientId())) {
             return ResponseEntity
                     .status(HttpStatus.BAD_REQUEST)
                     .body("Nie znaleziono klienta o ID: " + dto.getClientId());
@@ -44,28 +45,34 @@ public class ArtisanConnectController {
     // TODO: zamiast dodawać tutaj pętlą, musi to robić NoticeService, trzeba zaimplementować odpowienią metodę
     @PostMapping("/notices/bulk_add")
     public ResponseEntity<String> addNotices(@RequestBody List<NoticeDTO> notices_list) {
+        ResponseEntity<String> response = new ResponseEntity<>(HttpStatus.CREATED);
         List<String> errors = new ArrayList<>();
         boolean isError = false;
+
         if (notices_list.isEmpty()) {
-            return ResponseEntity
-                    .status(HttpStatus.BAD_REQUEST)
-                    .body("Lista ogłoszeń jest pusta.");
-        }
-        for (NoticeDTO dto : notices_list) {
-            if (!clientRepository.existsById(dto.getClientId())) {
-                isError = true;
-                errors.add("Nie znaleziono klienta o ID: " + dto.getClientId());
-            }
-        }
-        if(isError) {
-            return ResponseEntity
-                    .status(HttpStatus.BAD_REQUEST)
-                    .body(errors.toString());
+            return response.status(HttpStatus.BAD_REQUEST).body("Lista ogłoszeń jest pusta.");
         }
 
-        for(NoticeDTO dto : notices_list) {
-            noticeService.addNotice(noticeService.createFromDTO(dto));
+        for (NoticeDTO dto : notices_list) {
+            if (!clientService.getByID(dto.getClientId())) {
+                isError = true;
+                errors.add(dto.getClientId().toString());
+            } else {
+                if(!isError){
+                    noticeService.addNotice(noticeService.createFromDTO(dto));
+                }
+            }
         }
-        return ResponseEntity.status(HttpStatus.CREATED).body("Dodano ogłoszenia.");
+
+        if(isError) {
+            return response.status(HttpStatus.BAD_REQUEST).body("Nie znaleziono klientów: " + errors);
+        }
+
+        return response;
+    }
+
+    @GetMapping("/clients/all")
+    public List<ClientDTO> getAllClients() {
+        return clientService.getAllClients();
     }
 }
diff --git a/src/main/java/_11/asktpk/artisanconnectbackend/dto/ClientDTO.java b/src/main/java/_11/asktpk/artisanconnectbackend/dto/ClientDTO.java
index 5b3863f..62eadb9 100644
--- a/src/main/java/_11/asktpk/artisanconnectbackend/dto/ClientDTO.java
+++ b/src/main/java/_11/asktpk/artisanconnectbackend/dto/ClientDTO.java
@@ -1,4 +1,16 @@
 package _11.asktpk.artisanconnectbackend.dto;
 
+import lombok.Getter;
+import lombok.Setter;
+
+import _11.asktpk.artisanconnectbackend.utils.Enums.Role;
+
+@Getter @Setter
 public class ClientDTO {
+    private Long id;
+    private String email;
+    private String firstName;
+    private String lastName;
+    private String image;
+    private Role role;
 }
diff --git a/src/main/java/_11/asktpk/artisanconnectbackend/repository/ClientRepository.java b/src/main/java/_11/asktpk/artisanconnectbackend/repository/ClientRepository.java
index 253aad0..d4d07b7 100644
--- a/src/main/java/_11/asktpk/artisanconnectbackend/repository/ClientRepository.java
+++ b/src/main/java/_11/asktpk/artisanconnectbackend/repository/ClientRepository.java
@@ -1,6 +1,7 @@
 package _11.asktpk.artisanconnectbackend.repository;
 
 import _11.asktpk.artisanconnectbackend.entities.Client;
+
 import org.springframework.data.jpa.repository.JpaRepository;
 
 public interface ClientRepository extends JpaRepository<Client, Long> {
diff --git a/src/main/java/_11/asktpk/artisanconnectbackend/service/ClientService.java b/src/main/java/_11/asktpk/artisanconnectbackend/service/ClientService.java
new file mode 100644
index 0000000..65aa593
--- /dev/null
+++ b/src/main/java/_11/asktpk/artisanconnectbackend/service/ClientService.java
@@ -0,0 +1,53 @@
+package _11.asktpk.artisanconnectbackend.service;
+
+import _11.asktpk.artisanconnectbackend.dto.ClientDTO;
+import _11.asktpk.artisanconnectbackend.entities.Client;
+import _11.asktpk.artisanconnectbackend.repository.ClientRepository;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+public class ClientService {
+    private final ClientRepository clientRepository;
+
+    public ClientService(ClientRepository clientRepository) {
+        this.clientRepository = clientRepository;
+    }
+
+    public ClientDTO toDto(Client client) {
+        ClientDTO dto = new ClientDTO();
+
+        dto.setId(client.getId());
+        dto.setFirstName(client.getFirstName());
+        dto.setLastName(client.getLastName());
+        dto.setEmail(client.getEmail());
+        dto.setRole(client.getRole());
+        dto.setImage(client.getImage());
+
+        return dto;
+    }
+
+    public Client fromDto(ClientDTO dto) {
+        Client client = new Client();
+
+        client.setId(dto.getId());
+        client.setFirstName(dto.getFirstName());
+        client.setLastName(dto.getLastName());
+        client.setEmail(dto.getEmail());
+        client.setRole(dto.getRole());
+        client.setImage(dto.getImage());
+
+        return client;
+    }
+
+    public List<ClientDTO> getAllClients() {
+        List<Client> clients = clientRepository.findAll();
+        return clients.stream().map(this::toDto).toList();
+    }
+
+    public boolean getByID(Long id) {
+        return clientRepository.existsById(id);
+    }
+
+}