diff --git a/client-api/src/main/java/ru/dragonestia/picker/api/repository/UserRepository.java b/client-api/src/main/java/ru/dragonestia/picker/api/repository/UserRepository.java
index c23a626..29b42a6 100644
--- a/client-api/src/main/java/ru/dragonestia/picker/api/repository/UserRepository.java
+++ b/client-api/src/main/java/ru/dragonestia/picker/api/repository/UserRepository.java
@@ -1,26 +1,23 @@
 package ru.dragonestia.picker.api.repository;
 
-import ru.dragonestia.picker.api.model.room.ResponseRoom;
-import ru.dragonestia.picker.api.model.room.RoomDetails;
+import org.jetbrains.annotations.NotNull;
 import ru.dragonestia.picker.api.model.room.ShortResponseRoom;
 import ru.dragonestia.picker.api.model.user.ResponseUser;
-import ru.dragonestia.picker.api.model.user.UserDetails;
+import ru.dragonestia.picker.api.repository.request.user.*;
 
-import java.util.Collection;
 import java.util.List;
-import java.util.Set;
 
 public interface UserRepository {
 
-    void linkWithRoom(ResponseRoom room, Collection<ResponseUser> users, boolean force);
+    void linkUsersWithRoom(@NotNull LinkUsersWithRoom request);
 
-    void unlinkFromRoom(ResponseRoom room, Collection<ResponseUser> users);
+    void unlinkUsersFromRoom(@NotNull UnlinkUsersFromRoom request);
 
-    List<ResponseUser> all(ResponseRoom room, Set<UserDetails> details);
+    @NotNull List<ResponseUser> getAllUsersFormRoom(@NotNull GetAllUsersFromRoom request);
 
-    List<ResponseUser> search(String input, Set<UserDetails> details);
+    @NotNull List<ResponseUser> searchUsers(@NotNull SearchUsers request);
 
-    ResponseUser find(String userId, Set<UserDetails> details);
+    @NotNull ResponseUser findUserById(@NotNull FindUserById request);
 
-    List<ShortResponseRoom> getLinkedRoomsWithUsers(ResponseUser user, Set<RoomDetails> roomDetails);
+    @NotNull List<ShortResponseRoom> findRoomsLinkedWithUser(@NotNull FindRoomsLinkedWithUser request);
 }
diff --git a/client-api/src/main/java/ru/dragonestia/picker/api/repository/request/user/FindRoomsLinkedWithUser.java b/client-api/src/main/java/ru/dragonestia/picker/api/repository/request/user/FindRoomsLinkedWithUser.java
new file mode 100644
index 0000000..1266520
--- /dev/null
+++ b/client-api/src/main/java/ru/dragonestia/picker/api/repository/request/user/FindRoomsLinkedWithUser.java
@@ -0,0 +1,66 @@
+package ru.dragonestia.picker.api.repository.request.user;
+
+import org.jetbrains.annotations.Contract;
+import org.jetbrains.annotations.NotNull;
+import ru.dragonestia.picker.api.model.room.RoomDetails;
+import ru.dragonestia.picker.api.repository.type.UserIdentifier;
+
+import java.util.HashSet;
+import java.util.Set;
+
+public class FindRoomsLinkedWithUser {
+
+    private final String userId;
+    private final Set<RoomDetails> details;
+
+    private FindRoomsLinkedWithUser(String userId, Set<RoomDetails> details) {
+        this.userId = userId;
+        this.details = details;
+    }
+
+    public @NotNull String getUserId() {
+        return userId;
+    }
+
+    public @NotNull Set<RoomDetails> getDetails() {
+        return details;
+    }
+
+    public static @NotNull Builder builder() {
+        return new Builder();
+    }
+
+    public static class Builder {
+
+        private String userId = null;
+        private Set<RoomDetails> details = new HashSet<>();
+
+        private Builder() {}
+
+        @Contract("_ -> this")
+        public @NotNull Builder setUserId(@NotNull UserIdentifier identifier) {
+            userId = identifier.getValue();
+            return this;
+        }
+
+        @Contract("_ -> this")
+        public @NotNull Builder setDetails(@NotNull Set<RoomDetails> details) {
+            this.details = details;
+            return this;
+        }
+
+        @Contract("_ -> this")
+        public @NotNull Builder appendDetail(@NotNull RoomDetails detail) {
+            details.add(detail);
+            return this;
+        }
+
+        public @NotNull FindRoomsLinkedWithUser build() {
+            if (userId == null) {
+                throw new NullPointerException("User id is null");
+            }
+
+            return new FindRoomsLinkedWithUser(userId, details);
+        }
+    }
+}
diff --git a/client-api/src/main/java/ru/dragonestia/picker/api/repository/request/user/FindUserById.java b/client-api/src/main/java/ru/dragonestia/picker/api/repository/request/user/FindUserById.java
new file mode 100644
index 0000000..48a0941
--- /dev/null
+++ b/client-api/src/main/java/ru/dragonestia/picker/api/repository/request/user/FindUserById.java
@@ -0,0 +1,81 @@
+package ru.dragonestia.picker.api.repository.request.user;
+
+import org.jetbrains.annotations.Contract;
+import org.jetbrains.annotations.NotNull;
+import ru.dragonestia.picker.api.model.user.UserDetails;
+import ru.dragonestia.picker.api.repository.type.UserIdentifier;
+
+import java.util.*;
+import java.util.stream.Collectors;
+
+public class FindUserById {
+
+    private final String userId;
+    private final Set<UserDetails> details;
+
+    private FindUserById(String userId, Set<UserDetails> details) {
+        this.userId = userId;
+        this.details = details;
+    }
+
+    public @NotNull String getUserId() {
+        return userId;
+    }
+
+    public @NotNull Set<UserDetails> getDetails() {
+        return details;
+    }
+
+    @Contract("_ -> new")
+    public static @NotNull FindUserById just(@NotNull UserIdentifier userId) {
+        return builder()
+                .setUserId(userId)
+                .build();
+    }
+
+    @Contract("_ -> new")
+    public static @NotNull FindUserById withAllDetails(@NotNull UserIdentifier userId) {
+        return builder()
+                .setUserId(userId)
+                .setDetails(Arrays.stream(UserDetails.values()).collect(Collectors.toSet()))
+                .build();
+    }
+
+    public static @NotNull Builder builder() {
+        return new Builder();
+    }
+
+    public static class Builder {
+
+        private String userId = null;
+        private Set<UserDetails> details = new HashSet<>();
+
+        private Builder() {}
+
+        @Contract("_ -> this")
+        public @NotNull Builder setUserId(@NotNull UserIdentifier identifier) {
+            userId = identifier.getValue();
+            return this;
+        }
+
+        @Contract("_ -> this")
+        public @NotNull Builder setDetails(@NotNull Set<UserDetails> details) {
+            this.details = details;
+            return this;
+        }
+
+        @Contract("_ -> this")
+        public @NotNull Builder appendDetail(@NotNull UserDetails detail) {
+            details.add(detail);
+            return this;
+        }
+
+        public @NotNull FindUserById build() {
+            if (userId == null) {
+                throw new NullPointerException("User id is null");
+            }
+
+            return new FindUserById(userId, Collections.unmodifiableSet(details));
+        }
+    }
+}
diff --git a/client-api/src/main/java/ru/dragonestia/picker/api/repository/request/user/GetAllUsersFromRoom.java b/client-api/src/main/java/ru/dragonestia/picker/api/repository/request/user/GetAllUsersFromRoom.java
new file mode 100644
index 0000000..4a4ba3b
--- /dev/null
+++ b/client-api/src/main/java/ru/dragonestia/picker/api/repository/request/user/GetAllUsersFromRoom.java
@@ -0,0 +1,84 @@
+package ru.dragonestia.picker.api.repository.request.user;
+
+import org.jetbrains.annotations.Contract;
+import org.jetbrains.annotations.NotNull;
+import ru.dragonestia.picker.api.model.user.UserDetails;
+import ru.dragonestia.picker.api.repository.type.NodeIdentifier;
+import ru.dragonestia.picker.api.repository.type.RoomIdentifier;
+
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+
+public class GetAllUsersFromRoom {
+
+    private final String nodeId;
+    private final String roomId;
+    private final Set<UserDetails> details;
+
+    private GetAllUsersFromRoom(String nodeId, String roomId, Set<UserDetails> details) {
+        this.nodeId = nodeId;
+        this.roomId = roomId;
+        this.details = details;
+    }
+
+    public @NotNull String getNodeId() {
+        return nodeId;
+    }
+
+    public @NotNull String getRoomId() {
+        return roomId;
+    }
+
+    public @NotNull Set<UserDetails> getDetails() {
+        return details;
+    }
+
+    public static @NotNull Builder builder() {
+        return new Builder();
+    }
+
+    public static class Builder {
+
+        private String nodeId = null;
+        private String roomId = null;
+        private Set<UserDetails> details = new HashSet<>();
+
+        private Builder() {}
+
+        @Contract("_ -> this")
+        public @NotNull Builder setNodeId(@NotNull NodeIdentifier identifier) {
+            nodeId = identifier.getValue();
+            return this;
+        }
+
+        @Contract("_ -> this")
+        public @NotNull Builder setRoomId(@NotNull RoomIdentifier identifier) {
+            roomId = identifier.getValue();
+            return this;
+        }
+
+        @Contract("_ -> this")
+        public @NotNull Builder setDetails(@NotNull Set<UserDetails> details) {
+            this.details = details;
+            return this;
+        }
+
+        @Contract("_ -> this")
+        public @NotNull Builder appendDetail(@NotNull UserDetails detail) {
+            details.add(detail);
+            return this;
+        }
+
+        public @NotNull GetAllUsersFromRoom build() {
+            if (nodeId == null) {
+                throw new NullPointerException("Node id is null");
+            }
+            if (roomId == null) {
+                throw new NullPointerException("Room id is null");
+            }
+
+            return new GetAllUsersFromRoom(nodeId, roomId, Collections.unmodifiableSet(details));
+        }
+    }
+}
diff --git a/client-api/src/main/java/ru/dragonestia/picker/api/repository/request/user/LinkUsersWithRoom.java b/client-api/src/main/java/ru/dragonestia/picker/api/repository/request/user/LinkUsersWithRoom.java
new file mode 100644
index 0000000..8e889d2
--- /dev/null
+++ b/client-api/src/main/java/ru/dragonestia/picker/api/repository/request/user/LinkUsersWithRoom.java
@@ -0,0 +1,100 @@
+package ru.dragonestia.picker.api.repository.request.user;
+
+import org.jetbrains.annotations.Contract;
+import org.jetbrains.annotations.NotNull;
+import ru.dragonestia.picker.api.repository.type.NodeIdentifier;
+import ru.dragonestia.picker.api.repository.type.RoomIdentifier;
+import ru.dragonestia.picker.api.repository.type.UserIdentifier;
+
+import java.util.HashSet;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+public class LinkUsersWithRoom {
+
+    private final String nodeId;
+    private final String roomId;
+    private final Set<String> users;
+    private final boolean ignoreSlotLimitation;
+
+    private LinkUsersWithRoom(String nodeId, String roomId, Set<String> users, boolean ignoreSlotLimitation) {
+        this.nodeId = nodeId;
+        this.roomId = roomId;
+        this.users = users;
+        this.ignoreSlotLimitation = ignoreSlotLimitation;
+    }
+
+    public @NotNull String getNodeId() {
+        return nodeId;
+    }
+
+    public @NotNull String getRoomId() {
+        return roomId;
+    }
+
+    public @NotNull Set<String> getUsers() {
+        return users;
+    }
+
+    public boolean ignoreSlotLimitation() {
+        return ignoreSlotLimitation;
+    }
+
+    public static @NotNull Builder builder() {
+        return new Builder();
+    }
+
+    public static class Builder {
+
+        private String nodeId = null;
+        private String roomId = null;
+        private Set<UserIdentifier> users = new HashSet<>();
+        private boolean ignoreSlotLimitation = false;
+
+        private Builder() {}
+
+        @Contract("_ -> this")
+        public @NotNull Builder setNodeId(@NotNull NodeIdentifier identifier) {
+            nodeId = identifier.getValue();
+            return this;
+        }
+
+        @Contract("_ -> this")
+        public @NotNull Builder setRoomId(@NotNull RoomIdentifier identifier) {
+            roomId = identifier.getValue();
+            return this;
+        }
+
+        @Contract("_ -> this")
+        public @NotNull Builder setUsers(@NotNull Set<UserIdentifier> users) {
+            this.users = users;
+            return this;
+        }
+
+        @Contract("_ -> this")
+        public @NotNull Builder appendUser(@NotNull UserIdentifier user) {
+            users.add(user);
+            return this;
+        }
+
+        @Contract("_ -> this")
+        public @NotNull Builder setIgnoreSlotLimitation(boolean value) {
+            ignoreSlotLimitation = value;
+            return this;
+        }
+
+        public @NotNull LinkUsersWithRoom build() {
+            if (nodeId == null) {
+                throw new NullPointerException("Node id is null");
+            }
+            if (roomId == null) {
+                throw new NullPointerException("Room id is null");
+            }
+
+            return new LinkUsersWithRoom(nodeId,
+                    roomId,
+                    users.stream().map(o -> o.getValue()).collect(Collectors.toSet()),
+                    ignoreSlotLimitation);
+        }
+    }
+}
diff --git a/client-api/src/main/java/ru/dragonestia/picker/api/repository/request/user/SearchUsers.java b/client-api/src/main/java/ru/dragonestia/picker/api/repository/request/user/SearchUsers.java
new file mode 100644
index 0000000..f6fa71f
--- /dev/null
+++ b/client-api/src/main/java/ru/dragonestia/picker/api/repository/request/user/SearchUsers.java
@@ -0,0 +1,84 @@
+package ru.dragonestia.picker.api.repository.request.user;
+
+import org.jetbrains.annotations.Contract;
+import org.jetbrains.annotations.NotNull;
+import ru.dragonestia.picker.api.model.user.UserDetails;
+import ru.dragonestia.picker.api.repository.type.UserIdentifier;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+public class SearchUsers {
+
+    private final String searchInput;
+    private final Set<UserDetails> details;
+
+    private SearchUsers(String searchInput, Set<UserDetails> details) {
+        this.searchInput = searchInput;
+        this.details = details;
+    }
+
+    public @NotNull String getSearchInput() {
+        return searchInput;
+    }
+
+    public @NotNull Set<UserDetails> getDetails() {
+        return details;
+    }
+
+    @Contract("_ -> new")
+    public static @NotNull SearchUsers just(@NotNull UserIdentifier searchInput) {
+        return SearchUsers.builder()
+                .setSearchInput(searchInput)
+                .build();
+    }
+
+    @Contract("_ -> new")
+    public static @NotNull SearchUsers withAllDetails(@NotNull UserIdentifier searchInput) {
+        return SearchUsers.builder()
+                .setSearchInput(searchInput)
+                .setDetails(Arrays.stream(UserDetails.values()).collect(Collectors.toSet()))
+                .build();
+    }
+
+    public static @NotNull Builder builder() {
+        return new Builder();
+    }
+
+    public static class Builder {
+
+        private String searchInput = null;
+        private Set<UserDetails> details = new HashSet<>();
+
+        private Builder() {}
+
+        @Contract("_ -> this")
+        public @NotNull Builder setSearchInput(@NotNull UserIdentifier input) {
+            searchInput = input.getValue();
+            return this;
+        }
+
+        @Contract("_ -> this")
+        public @NotNull Builder setDetails(@NotNull Set<UserDetails> details) {
+            this.details = details;
+            return this;
+        }
+
+        @Contract("_ -> this")
+        public @NotNull Builder appendDetail(@NotNull UserDetails detail) {
+            details.add(detail);
+            return this;
+        }
+
+        public @NotNull SearchUsers build() {
+            if (searchInput == null) {
+                throw new NullPointerException("SearchInput is null");
+            }
+
+            return new SearchUsers(searchInput, Collections.unmodifiableSet(details));
+        }
+    }
+}
diff --git a/client-api/src/main/java/ru/dragonestia/picker/api/repository/request/user/UnlinkUsersFromRoom.java b/client-api/src/main/java/ru/dragonestia/picker/api/repository/request/user/UnlinkUsersFromRoom.java
new file mode 100644
index 0000000..46a7151
--- /dev/null
+++ b/client-api/src/main/java/ru/dragonestia/picker/api/repository/request/user/UnlinkUsersFromRoom.java
@@ -0,0 +1,86 @@
+package ru.dragonestia.picker.api.repository.request.user;
+
+import org.jetbrains.annotations.Contract;
+import org.jetbrains.annotations.NotNull;
+import ru.dragonestia.picker.api.repository.type.NodeIdentifier;
+import ru.dragonestia.picker.api.repository.type.RoomIdentifier;
+import ru.dragonestia.picker.api.repository.type.UserIdentifier;
+
+import java.util.HashSet;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+public class UnlinkUsersFromRoom {
+
+    private final String nodeId;
+    private final String roomId;
+    private final Set<String> users;
+
+    private UnlinkUsersFromRoom(String nodeId, String roomId, Set<String> users) {
+        this.nodeId = nodeId;
+        this.roomId = roomId;
+        this.users = users;
+    }
+
+    public @NotNull String getNodeId() {
+        return nodeId;
+    }
+
+    public @NotNull String getRoomId() {
+        return roomId;
+    }
+
+    public @NotNull Set<String> getUsers() {
+        return users;
+    }
+
+    public static @NotNull Builder builder() {
+        return new Builder();
+    }
+
+    public static class Builder {
+
+        private String nodeId = null;
+        private String roomId = null;
+        private Set<UserIdentifier> users = new HashSet<>();
+
+        private Builder() {}
+
+        @Contract("_ -> this")
+        public @NotNull Builder setNodeId(@NotNull NodeIdentifier identifier) {
+            nodeId = identifier.getValue();
+            return this;
+        }
+
+        @Contract("_ -> this")
+        public @NotNull Builder setRoomId(@NotNull RoomIdentifier identifier) {
+            roomId = identifier.getValue();
+            return this;
+        }
+
+        @Contract("_ -> this")
+        public @NotNull Builder setUsers(@NotNull Set<UserIdentifier> users) {
+            this.users = users;
+            return this;
+        }
+
+        @Contract("_ -> this")
+        public @NotNull Builder appendUser(@NotNull UserIdentifier user) {
+            users.add(user);
+            return this;
+        }
+
+        public @NotNull UnlinkUsersFromRoom build() {
+            if (nodeId == null) {
+                throw new NullPointerException("Node id is null");
+            }
+            if (roomId == null) {
+                throw new NullPointerException("Room id is null");
+            }
+
+            return new UnlinkUsersFromRoom(nodeId,
+                    roomId,
+                    users.stream().map(o -> o.getValue()).collect(Collectors.toSet()));
+        }
+    }
+}