diff --git a/web_backend/src/main/java/haw/teamagochi/backend/pet/logic/UcLeaderboard.java b/web_backend/src/main/java/haw/teamagochi/backend/pet/logic/UcLeaderboard.java
new file mode 100644
index 00000000..98fa60c5
--- /dev/null
+++ b/web_backend/src/main/java/haw/teamagochi/backend/pet/logic/UcLeaderboard.java
@@ -0,0 +1,46 @@
+package haw.teamagochi.backend.pet.logic;
+
+import haw.teamagochi.backend.pet.dataaccess.model.PetEntity;
+import java.util.List;
+
+public interface UcLeaderboard {
+
+  /**
+   * Ranked on Happiness and Wellbeing, two are equally ranked the name decides
+   * @return the top 10 Pets
+   */
+  List<PetEntity> getTop10();
+
+  /**
+   * Ranked on Happiness and Wellbeing, two are equally ranked the name decides
+   * @return the leaderboard consisting of all pets
+   */
+  List<PetEntity> getCompleteLeaderBoard();
+
+  /**
+   * Ranked purely on Happiness, when two are equally ranked the name decides
+   * @return the top 10 pets according to their Happiness
+   */
+  List<PetEntity> getHappinessTop10();
+
+  /**
+   * Ranked purely on Happiness, when two are equally ranked the name decides
+   * @return the leaderboard consisting of all pets
+   */
+  List<PetEntity> getCompleteHappinessLeaderBoard();
+
+  /**
+   * Ranked purely on Wellbeing, when two are equally ranked the name decides
+   * @return the top 10 pets according to their Wellbeing
+   */
+  List<PetEntity> getWellbeingTop10();
+
+  /**
+   * Ranked purely on Wellbeing, when two are equally ranked the name decides
+   * @return the leaderboard consisting of all pets
+   */
+  List<PetEntity> getCompleteWellbeingLeaderboard();
+
+
+
+}
diff --git a/web_backend/src/main/java/haw/teamagochi/backend/pet/logic/UcLeaderboardImpl.java b/web_backend/src/main/java/haw/teamagochi/backend/pet/logic/UcLeaderboardImpl.java
new file mode 100644
index 00000000..c2925c70
--- /dev/null
+++ b/web_backend/src/main/java/haw/teamagochi/backend/pet/logic/UcLeaderboardImpl.java
@@ -0,0 +1,74 @@
+package haw.teamagochi.backend.pet.logic;
+
+import haw.teamagochi.backend.pet.dataaccess.model.PetEntity;
+import haw.teamagochi.backend.pet.logic.UcLeaderboard;
+import haw.teamagochi.backend.pet.logic.comparator.PetSortByHappiness;
+import haw.teamagochi.backend.pet.logic.comparator.PetSortByWellbeing;
+import haw.teamagochi.backend.pet.logic.comparator.PetSortByWellbeingAndHappiness;
+import jakarta.enterprise.context.ApplicationScoped;
+import jakarta.inject.Inject;
+import java.util.ArrayList;
+import java.util.LinkedList;
+import java.util.List;
+
+@ApplicationScoped
+public class UcLeaderboardImpl implements UcLeaderboard {
+
+  @Inject
+  UcFindPet findPet;
+
+  PetSortByHappiness compHappiness = new PetSortByHappiness();
+  PetSortByWellbeing compWellbeing = new PetSortByWellbeing();
+  PetSortByWellbeingAndHappiness compDefault = new PetSortByWellbeingAndHappiness();
+
+  @Override
+  public List<PetEntity> getTop10() {
+    List<PetEntity> leaderboard = getCompleteLeaderBoard();
+    if(leaderboard.size()>10){
+      return leaderboard.subList(0,10);
+    }
+    return leaderboard;
+  }
+
+  @Override
+  public List<PetEntity> getCompleteLeaderBoard() {
+    ArrayList<PetEntity> leaderboard = new ArrayList<>();
+        leaderboard.addAll(findPet.findAll());
+    leaderboard.sort(compDefault);
+    return leaderboard;
+  }
+
+  @Override
+  public List<PetEntity> getHappinessTop10() {
+    List<PetEntity> leaderboard = getCompleteHappinessLeaderBoard();
+    if(leaderboard.size()>10){
+      return leaderboard.subList(0,10);
+    }
+    return leaderboard;
+  }
+
+  @Override
+  public List<PetEntity> getCompleteHappinessLeaderBoard() {
+    ArrayList<PetEntity> leaderboard = new ArrayList<>();
+    leaderboard.addAll(findPet.findAll());
+    leaderboard.sort(compHappiness);
+    return leaderboard;
+  }
+
+  @Override
+  public List<PetEntity> getWellbeingTop10() {
+    List<PetEntity> leaderboard = getCompleteWellbeingLeaderboard();
+    if(leaderboard.size()>10){
+      return leaderboard.subList(0,10);
+    }
+    return leaderboard;
+  }
+
+  @Override
+  public List<PetEntity> getCompleteWellbeingLeaderboard() {
+    ArrayList<PetEntity> leaderboard = new ArrayList<>();
+    leaderboard.addAll(findPet.findAll());
+    leaderboard.sort(compWellbeing);
+    return leaderboard;
+  }
+}
diff --git a/web_backend/src/main/java/haw/teamagochi/backend/pet/logic/comparator/PetSortByHappiness.java b/web_backend/src/main/java/haw/teamagochi/backend/pet/logic/comparator/PetSortByHappiness.java
new file mode 100644
index 00000000..93ea4e63
--- /dev/null
+++ b/web_backend/src/main/java/haw/teamagochi/backend/pet/logic/comparator/PetSortByHappiness.java
@@ -0,0 +1,18 @@
+package haw.teamagochi.backend.pet.logic.comparator;
+
+import haw.teamagochi.backend.pet.dataaccess.model.PetEntity;
+import java.util.Comparator;
+
+public class PetSortByHappiness implements Comparator<PetEntity> {
+
+  @Override
+  public int compare(PetEntity o1, PetEntity o2) {
+    int res = o1.getHappiness() - o2.getHappiness();
+    if(res == 0){
+      return(o1.getName().compareTo(o2.getName()));
+    } else if (res < 0) {
+      return 1;
+    }
+    return -1;
+  }//metthod
+}
diff --git a/web_backend/src/main/java/haw/teamagochi/backend/pet/logic/comparator/PetSortByWellbeing.java b/web_backend/src/main/java/haw/teamagochi/backend/pet/logic/comparator/PetSortByWellbeing.java
new file mode 100644
index 00000000..7147d545
--- /dev/null
+++ b/web_backend/src/main/java/haw/teamagochi/backend/pet/logic/comparator/PetSortByWellbeing.java
@@ -0,0 +1,20 @@
+package haw.teamagochi.backend.pet.logic.comparator;
+
+import haw.teamagochi.backend.pet.dataaccess.model.PetEntity;
+import java.util.Comparator;
+
+public class PetSortByWellbeing implements Comparator<PetEntity> {
+
+
+  @Override
+  public int compare(PetEntity o1, PetEntity o2) {
+    int res = o1.getWellbeing() - o2.getWellbeing();
+    if(res == 0){
+      return(o1.getName().compareTo(o2.getName()));
+    } else if (res < 0) {
+      return 1;
+    }
+    return -1;
+  }//metthod
+
+}
diff --git a/web_backend/src/main/java/haw/teamagochi/backend/pet/logic/comparator/PetSortByWellbeingAndHappiness.java b/web_backend/src/main/java/haw/teamagochi/backend/pet/logic/comparator/PetSortByWellbeingAndHappiness.java
new file mode 100644
index 00000000..bb9753d6
--- /dev/null
+++ b/web_backend/src/main/java/haw/teamagochi/backend/pet/logic/comparator/PetSortByWellbeingAndHappiness.java
@@ -0,0 +1,20 @@
+package haw.teamagochi.backend.pet.logic.comparator;
+
+import haw.teamagochi.backend.pet.dataaccess.model.PetEntity;
+import java.util.Comparator;
+
+public class PetSortByWellbeingAndHappiness implements Comparator<PetEntity> {
+  @Override
+  public int compare(PetEntity o1, PetEntity o2) {
+    int o1SumHappWell = o1.getWellbeing() + o1.getHappiness();
+    int o2SumHappWell = o2.getWellbeing() + o2.getHappiness();
+    int res = o1SumHappWell - o2SumHappWell;
+    if(res == 0){
+      return(o1.getName().compareTo(o2.getName()));
+    } else if (res < 0) {
+      return 1;
+    }
+    return -1;
+  }//method
+
+}
diff --git a/web_backend/src/main/java/haw/teamagochi/backend/pet/service/rest/v1/PetRestSelfService.java b/web_backend/src/main/java/haw/teamagochi/backend/pet/service/rest/v1/PetRestSelfService.java
index 7c3b6a80..e579724a 100644
--- a/web_backend/src/main/java/haw/teamagochi/backend/pet/service/rest/v1/PetRestSelfService.java
+++ b/web_backend/src/main/java/haw/teamagochi/backend/pet/service/rest/v1/PetRestSelfService.java
@@ -4,6 +4,7 @@
 import haw.teamagochi.backend.pet.dataaccess.model.PetEntity;
 import haw.teamagochi.backend.pet.logic.UcFindPet;
 import haw.teamagochi.backend.pet.logic.UcFindPetType;
+import haw.teamagochi.backend.pet.logic.UcLeaderboard;
 import haw.teamagochi.backend.pet.logic.UcManagePet;
 import haw.teamagochi.backend.pet.service.rest.v1.mapper.PetMapper;
 import haw.teamagochi.backend.pet.service.rest.v1.model.PetDTO;
@@ -54,6 +55,9 @@ public class PetRestSelfService {
   @Inject
   protected UcFindPetType ucFindPetType;
 
+  @Inject
+  protected UcLeaderboard ucLeaderboard;
+
   /**
    * Get all pets.
    *
@@ -112,4 +116,14 @@ public PetDTO getPetById(@PathParam("petId") long petId) {
     }
     throw new NotFoundException();
   }
+
+  @GET
+  @Path("/leaderboard")
+  @Operation(summary = "Get the current Leaderboard")
+  @APIResponse(responseCode = "200")
+  public List<PetDTO> getLeaderboard() {
+    String uuid = SecurityUtil.getExternalUserId(identity);
+    List<PetEntity> leaderboard = ucLeaderboard.getCompleteLeaderBoard();
+    return petMapper.mapEntityToTransferObject(leaderboard);
+  }
 }
diff --git a/web_backend/src/test/java/haw/teamagochi/backend/pet/logic/UcLeaderboardTest.java b/web_backend/src/test/java/haw/teamagochi/backend/pet/logic/UcLeaderboardTest.java
new file mode 100644
index 00000000..0958e26b
--- /dev/null
+++ b/web_backend/src/test/java/haw/teamagochi/backend/pet/logic/UcLeaderboardTest.java
@@ -0,0 +1,151 @@
+package haw.teamagochi.backend.pet.logic;
+
+import haw.teamagochi.backend.pet.dataaccess.model.PetEntity;
+import haw.teamagochi.backend.pet.dataaccess.model.PetTypeEntity;
+import haw.teamagochi.backend.pet.dataaccess.repository.PetRepository;
+import haw.teamagochi.backend.user.dataaccess.model.UserEntity;
+import haw.teamagochi.backend.user.logic.UcManageUser;
+import io.quarkus.test.junit.QuarkusTest;
+import jakarta.inject.Inject;
+import jakarta.transaction.Transactional;
+import java.util.HashMap;
+import java.util.List;
+import java.util.UUID;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+@QuarkusTest
+public class UcLeaderboardTest {
+
+  @Inject
+  PetRepository repo;
+  @Inject
+  UcLeaderboard leaderbaords;
+  @Inject
+  UcManagePetType ucManagePetType;
+  @Inject
+  UcManagePet petManger;
+  @Inject
+  UcManageUser userManger;
+  @Inject UcFindPet findPet;
+
+  HashMap<String, PetEntity> petEntities;
+
+  @BeforeEach
+  @Transactional
+  void beforeEach() {
+    petManger.deleteAll();
+    UserEntity owner = userManger.create(UUID.randomUUID());
+    PetTypeEntity petType = ucManagePetType.createPetType("Frog");
+
+    petEntities = new HashMap<>();
+    PetEntity pet1 = petManger.create(owner.getId(), "ABC", petType.getId());
+    pet1.setHappiness(100);
+    pet1.setWellbeing(100);
+
+    PetEntity pet2 = petManger.create(owner.getId(), "Muffl", petType.getId());
+    pet2.setHappiness(90);
+    pet2.setWellbeing(90);
+
+    PetEntity pet3 = petManger.create(owner.getId(), "BCD", petType.getId());
+    pet3.setHappiness(100);
+    pet3.setWellbeing(100);
+
+    repo.persist(pet1);
+    repo.persist(pet2);
+    repo.persist(pet3);
+    petEntities.put("pet1", pet1);
+    petEntities.put("pet2", pet2);
+    petEntities.put("pet3", pet3);
+
+    int statsModifyer = 1;
+    for (int i = 15; i >= 4; i--) {
+      //add some more pets
+      PetEntity tmpPet = petManger.create(owner.getId(), "petewbv" + i, petType.getId());
+      tmpPet.setWellbeing(10 + statsModifyer*2);
+      tmpPet.setHappiness(10 + statsModifyer * 2);
+      repo.persist(tmpPet);
+      petEntities.put("pet" + i, tmpPet);
+      statsModifyer++;
+    }
+  }
+
+  @Test
+  void testGetTop10() {
+    Assertions.assertEquals(15, petEntities.size());
+    Assertions.assertEquals(15, findPet.findAll().size());
+    List<PetEntity> leaderboard = leaderbaords.getTop10();
+    Assertions.assertEquals(10, leaderboard.size());
+    Assertions.assertEquals(petEntities.get("pet1"), leaderboard.get(0));
+    Assertions.assertEquals(petEntities.get("pet3"), leaderboard.get(1));
+    Assertions.assertEquals(petEntities.get("pet2"), leaderboard.get(2));
+    for (int i = 4; i <= 10; i++) {
+      Assertions.assertEquals(petEntities.get("pet" + i), leaderboard.get(i - 1));
+    }
+  }//method
+
+  @Test
+  void testgetCompleteLeaderBoard() {
+    List<PetEntity> leaderboard = leaderbaords.getCompleteLeaderBoard();
+    Assertions.assertEquals(15, leaderboard.size());
+    Assertions.assertEquals(petEntities.get("pet1"), leaderboard.get(0));
+    Assertions.assertEquals(petEntities.get("pet3"), leaderboard.get(1));
+    Assertions.assertEquals(petEntities.get("pet2"), leaderboard.get(2));
+    for (int i = 4; i <= 15; i++) {
+      Assertions.assertEquals(petEntities.get("pet" + i), leaderboard.get(i - 1));
+    }
+  }//method
+
+  @Test
+  void testGetHappinessTop10() {
+    Assertions.assertEquals(15, petEntities.size());
+    Assertions.assertEquals(15, findPet.findAll().size());
+    List<PetEntity> leaderboard = leaderbaords.getHappinessTop10();
+    Assertions.assertEquals(10, leaderboard.size());
+    Assertions.assertEquals(petEntities.get("pet1"), leaderboard.get(0));
+    Assertions.assertEquals(petEntities.get("pet3"), leaderboard.get(1));
+    Assertions.assertEquals(petEntities.get("pet2"), leaderboard.get(2));
+    for (int i = 4; i <= 10; i++) {
+      Assertions.assertEquals(petEntities.get("pet" + i), leaderboard.get(i - 1));
+    }
+  }//method
+
+  @Test
+  void testGetCompleteHappinessLeaderBoard() {
+    List<PetEntity> leaderboard = leaderbaords.getCompleteHappinessLeaderBoard();
+    Assertions.assertEquals(15, leaderboard.size());
+    Assertions.assertEquals(petEntities.get("pet1"), leaderboard.get(0));
+    Assertions.assertEquals(petEntities.get("pet3"), leaderboard.get(1));
+    Assertions.assertEquals(petEntities.get("pet2"), leaderboard.get(2));
+    for (int i = 4; i <= 15; i++) {
+      Assertions.assertEquals(petEntities.get("pet" + i), leaderboard.get(i - 1));
+    }
+  }//method
+
+  @Test
+  void testGetWellbeingTop10() {
+    Assertions.assertEquals(15, petEntities.size());
+    Assertions.assertEquals(15, findPet.findAll().size());
+    List<PetEntity> leaderboard = leaderbaords.getWellbeingTop10();
+    Assertions.assertEquals(10, leaderboard.size());
+    Assertions.assertEquals(petEntities.get("pet1"), leaderboard.get(0));
+    Assertions.assertEquals(petEntities.get("pet3"), leaderboard.get(1));
+    Assertions.assertEquals(petEntities.get("pet2"), leaderboard.get(2));
+    for (int i = 4; i <= 10; i++) {
+      Assertions.assertEquals(petEntities.get("pet" + i), leaderboard.get(i - 1));
+    }
+  }//method
+
+  @Test
+  void testGetCompleteWellbeingLeaderBoard() {
+    List<PetEntity> leaderboard = leaderbaords.getCompleteWellbeingLeaderboard();
+    Assertions.assertEquals(15, leaderboard.size());
+    Assertions.assertEquals(petEntities.get("pet1"), leaderboard.get(0));
+    Assertions.assertEquals(petEntities.get("pet3"), leaderboard.get(1));
+    Assertions.assertEquals(petEntities.get("pet2"), leaderboard.get(2));
+    for (int i = 4; i <= 15; i++) {
+      Assertions.assertEquals(petEntities.get("pet" + i), leaderboard.get(i - 1));
+    }
+  }//method
+}//class