diff --git a/BeReadyBackend/BeReadyBackend.csproj b/BeReadyBackend/BeReadyBackend.csproj
index 90499a8..1697993 100644
--- a/BeReadyBackend/BeReadyBackend.csproj
+++ b/BeReadyBackend/BeReadyBackend.csproj
@@ -27,7 +27,6 @@
     </ItemGroup>
 
     <ItemGroup>
-      <Folder Include="DTO\Messages\" />
       <Folder Include="DTO\RandomChallenges\" />
     </ItemGroup>
 
diff --git a/BeReadyBackend/DTO/Groups/GetGroupDetailsDto.cs b/BeReadyBackend/DTO/Groups/GetGroupDetailsDto.cs
new file mode 100644
index 0000000..254b17c
--- /dev/null
+++ b/BeReadyBackend/DTO/Groups/GetGroupDetailsDto.cs
@@ -0,0 +1,17 @@
+using BeReadyBackend.DTO.Messages;
+
+namespace BeReadyBackend.DTO.Groups;
+
+public class GetGroupDetailsDto
+{
+    public int Id { get; set; }
+    public string? Label { get; set; }
+    public bool IsFinished { get; set; }
+    public string? Title { get; set; }
+    public string? Description { get; set; }
+    public int Duration { get; set; }
+    public DateTime CreationDate { get; set; }
+    
+    public List<GetMessageDto>? Messages { get; set; }
+    public List<GetUserGroupDto>? Users { get; set; }
+}
\ No newline at end of file
diff --git a/BeReadyBackend/DTO/Groups/GetGroupDto.cs b/BeReadyBackend/DTO/Groups/GetGroupDto.cs
new file mode 100644
index 0000000..b1a108a
--- /dev/null
+++ b/BeReadyBackend/DTO/Groups/GetGroupDto.cs
@@ -0,0 +1,8 @@
+namespace BeReadyBackend.DTO.Groups;
+
+public class GetGroupDto
+{
+    public int Id { get; set; }
+    public string? Label { get; set; }
+    public bool IsFinished { get; set; }
+}
\ No newline at end of file
diff --git a/BeReadyBackend/DTO/Messages/GetMessageDto.cs b/BeReadyBackend/DTO/Messages/GetMessageDto.cs
new file mode 100644
index 0000000..76bceac
--- /dev/null
+++ b/BeReadyBackend/DTO/Messages/GetMessageDto.cs
@@ -0,0 +1,10 @@
+namespace BeReadyBackend.DTO.Messages;
+
+public class GetMessageDto
+{
+    public int Id { get; set; }
+    public string? Libelle { get; set; }
+    public DateTime SendDate { get; set; }
+    public int UserId { get; set; }
+    public string? Username { get; set; }
+}
\ No newline at end of file
diff --git a/BeReadyBackend/Endpoints/Groups/GetAllGroupsEndpoint.cs b/BeReadyBackend/Endpoints/Groups/GetAllGroupsEndpoint.cs
new file mode 100644
index 0000000..7915b5a
--- /dev/null
+++ b/BeReadyBackend/Endpoints/Groups/GetAllGroupsEndpoint.cs
@@ -0,0 +1,23 @@
+using BeReadyBackend.DTO.Groups;
+using BeReadyBackend.Repositories;
+using BeReadyBackend.Services;
+using BeReadyBackend.Specifications.Groups;
+using FastEndpoints;
+
+namespace BeReadyBackend.Endpoints.Groups;
+
+public class GetAllGroupsEndpoint(UserGroupsRepository userGroupsRepository, UserService userService) : EndpointWithoutRequest<List<GetGroupDto>>
+{
+    public override void Configure()
+    {
+        Get("/Groups/Users/");
+    }
+
+    public override async Task HandleAsync(CancellationToken ct)
+    {
+        int userId = userService.GetUserIdFromToken();
+
+        List<GetGroupDto> groups = await userGroupsRepository.ProjectToListAsync<GetGroupDto>(new GetGroupsByUserIdSpec(userId), ct);
+        await Send.OkAsync(groups, ct);
+    }
+}
\ No newline at end of file
diff --git a/BeReadyBackend/Endpoints/Groups/GetGroupDetailsEndpoint.cs b/BeReadyBackend/Endpoints/Groups/GetGroupDetailsEndpoint.cs
new file mode 100644
index 0000000..58f5dce
--- /dev/null
+++ b/BeReadyBackend/Endpoints/Groups/GetGroupDetailsEndpoint.cs
@@ -0,0 +1,24 @@
+using BeReadyBackend.DTO.Groups;
+using BeReadyBackend.Repositories;
+using BeReadyBackend.Specifications.Groups;
+using FastEndpoints;
+
+namespace BeReadyBackend.Endpoints.Groups;
+
+public class GroupRequest
+{
+    public int Id { get; set; }
+}
+
+public class GetGroupDetailsEndpoint(GroupsRepository groupsRepository) : Endpoint<GroupRequest, GetGroupDetailsDto>
+{
+    public override void Configure()
+    {
+        Get("/Groups/{@Id}/", x => new { x.Id });
+    }
+
+    public override async Task HandleAsync(GroupRequest req, CancellationToken ct)
+    {
+        await Send.OkAsync(await groupsRepository.ProjectToSingleAsync<GetGroupDetailsDto>(new GetGroupByIdSpec(req.Id), ct), ct);
+    }
+}
\ No newline at end of file
diff --git a/BeReadyBackend/MappingProfiles/EntityToDtoMappings.cs b/BeReadyBackend/MappingProfiles/EntityToDtoMappings.cs
index 5b74d83..0d03362 100644
--- a/BeReadyBackend/MappingProfiles/EntityToDtoMappings.cs
+++ b/BeReadyBackend/MappingProfiles/EntityToDtoMappings.cs
@@ -2,6 +2,7 @@
 using BeReadyBackend.DTO.Achievements;
 using BeReadyBackend.DTO.Friends;
 using BeReadyBackend.DTO.Groups;
+using BeReadyBackend.DTO.Messages;
 using BeReadyBackend.DTO.Users;
 using BeReadyBackend.Models;
 using NSwag.Generation.Processors;
@@ -51,5 +52,17 @@ public class EntityToDtoMappings : Profile
             .ForMember(dest => dest.Id, opt => opt.MapFrom(src => src.UserId))
             .ForMember(dest => dest.Username, opt => opt.MapFrom(src => src.User!.Username))
             .ForMember(dest => dest.Score, opt => opt.MapFrom(src => src.User!.Score));
+
+        CreateMap<UserGroup, GetGroupDto>()
+            .ForMember(dest => dest.Id, opt => opt.MapFrom(src => src.GroupId))
+            .ForMember(dest => dest.Label, opt => opt.MapFrom(src => src.Group!.Label))
+            .ForMember(dest => dest.IsFinished, opt => opt.MapFrom(src => src.Group!.IsFinished));
+        
+        CreateMap<Group, GetGroupDetailsDto>()
+            .ForMember(dest => dest.Users, opt => opt.MapFrom(src => src.UserGroups))
+            .ForMember(dest => dest.Messages, opt => opt.MapFrom(src => src.Messages));
+            
+        CreateMap<Message, GetMessageDto>()
+            .ForMember(dest => dest.Username, opt => opt.MapFrom(src => src.User!.Username));
     }
 }
\ No newline at end of file
diff --git a/BeReadyBackend/Specifications/Groups/GetGroupByIdSpec.cs b/BeReadyBackend/Specifications/Groups/GetGroupByIdSpec.cs
index 12851ab..97afd11 100644
--- a/BeReadyBackend/Specifications/Groups/GetGroupByIdSpec.cs
+++ b/BeReadyBackend/Specifications/Groups/GetGroupByIdSpec.cs
@@ -8,7 +8,9 @@ public class GetGroupByIdSpec : SingleResultSpecification<Group>
     public GetGroupByIdSpec(int groupId)
     {
         Query
-            .Include(x => x.UserGroups)
+            .Include(x => x.UserGroups!)
+            .ThenInclude(x => x.User)
+            .Include(x => x.Messages)
             .Where(x => x.Id == groupId);
     }
 }
\ No newline at end of file
diff --git a/BeReadyBackend/Specifications/Groups/GetGroupsByUserIdSpec.cs b/BeReadyBackend/Specifications/Groups/GetGroupsByUserIdSpec.cs
new file mode 100644
index 0000000..63efa85
--- /dev/null
+++ b/BeReadyBackend/Specifications/Groups/GetGroupsByUserIdSpec.cs
@@ -0,0 +1,14 @@
+using Ardalis.Specification;
+using BeReadyBackend.Models;
+
+namespace BeReadyBackend.Specifications.Groups;
+
+public class GetGroupsByUserIdSpec : Specification<UserGroup>
+{
+    public GetGroupsByUserIdSpec(int  userId)
+    {
+        Query
+            .Include(x => x.Group)
+            .Where(x => x.UserId == userId);
+    }
+}
\ No newline at end of file