diff --git a/backend/endpoints/collections.py b/backend/endpoints/collections.py
index d1a632754..fe5157525 100644
--- a/backend/endpoints/collections.py
+++ b/backend/endpoints/collections.py
@@ -24,7 +24,11 @@ from handler.filesystem.base_handler import CoverSize
 from logger.formatter import BLUE
 from logger.formatter import highlight as hl
 from logger.logger import log
-from models.collection import Collection, SmartCollection
+from models.collection import (
+    Collection,
+    SmartCollection,
+    VirtualCollection,
+)
 from utils.router import APIRouter
 
 router = APIRouter(
@@ -153,9 +157,6 @@ def get_collections(
             description="Filter collections updated after this datetime (ISO 8601 format with timezone information)."
         ),
     ] = None,
-    only_ids: Annotated[
-        bool | None, Query(description="Only return list of IDs")
-    ] = None,
 ) -> list[CollectionSchema]:
     """Get collections endpoint
 
@@ -168,12 +169,32 @@ def get_collections(
     """
 
     collections = db_collection_handler.get_collections(
-        updated_after=updated_after, only_fields=[Collection.id] if only_ids else None
+        updated_after=updated_after,
     )
 
     return CollectionSchema.for_user(request.user.id, [c for c in collections])
 
 
+@protected_route(router.get, "/identifiers", [Scope.COLLECTIONS_READ])
+def get_collection_identifiers(
+    request: Request,
+) -> list[int]:
+    """Get collections identifiers endpoint
+
+    Args:
+        request (Request): Fastapi Request object
+
+    Returns:
+        list[int]: List of collection ids
+    """
+
+    collections = db_collection_handler.get_collections(
+        only_fields=[Collection.id, Collection.user_id, Collection.is_public],
+    )
+
+    return [c.id for c in collections if c.user_id == request.user.id or c.is_public]
+
+
 @protected_route(router.get, "/virtual", [Scope.COLLECTIONS_READ])
 def get_virtual_collections(
     request: Request,
@@ -215,7 +236,8 @@ def get_smart_collections(
     """
 
     smart_collections = db_collection_handler.get_smart_collections(
-        request.user.id, updated_after=updated_after
+        request.user.id,
+        updated_after=updated_after,
     )
 
     return SmartCollectionSchema.for_user(
@@ -223,6 +245,27 @@ def get_smart_collections(
     )
 
 
+@protected_route(router.get, "/smart/identifiers", [Scope.COLLECTIONS_READ])
+def get_smart_collection_identifiers(
+    request: Request,
+) -> list[int]:
+    """Get smart collections identifiers endpoint
+
+    Args:
+        request (Request): Fastapi Request object
+
+    Returns:
+        list[int]: List of smart collection ids
+    """
+
+    smart_collections = db_collection_handler.get_smart_collections(
+        request.user.id,
+        only_fields=[SmartCollection.id],
+    )
+
+    return [s.id for s in smart_collections]
+
+
 @protected_route(router.get, "/{id}", [Scope.COLLECTIONS_READ])
 def get_collection(request: Request, id: int) -> CollectionSchema:
     """Get collections endpoint
diff --git a/backend/endpoints/firmware.py b/backend/endpoints/firmware.py
index efc5ee0e7..b68c22ad4 100644
--- a/backend/endpoints/firmware.py
+++ b/backend/endpoints/firmware.py
@@ -1,6 +1,6 @@
 from typing import Annotated
 
-from fastapi import Body, File, HTTPException, Request, UploadFile, status
+from fastapi import Body, File, HTTPException, Query, Request, UploadFile, status
 from fastapi.responses import FileResponse
 
 from config import DISABLE_DOWNLOAD_ENDPOINT_AUTH
@@ -119,10 +119,28 @@ def get_platform_firmware(
     Returns:
         list[FirmwareSchema]: Firmware stored in the database
     """
-    return [
-        FirmwareSchema.model_validate(f)
-        for f in db_firmware_handler.list_firmware(platform_id=platform_id)
-    ]
+    firmware = db_firmware_handler.list_firmware(
+        platform_id=platform_id,
+    )
+    return [FirmwareSchema.model_validate(f) for f in firmware]
+
+
+@protected_route(router.get, "/identifiers", [Scope.FIRMWARE_READ])
+def get_firmware_identifiers(
+    request: Request,
+) -> list[int]:
+    """Get firmware identifiers endpoint
+
+    Args:
+        request (Request): Fastapi Request object
+
+    Returns:
+        list[int]: List of firmware ids
+    """
+    firmware = db_firmware_handler.list_firmware(
+        only_fields=[Firmware.id],
+    )
+    return [f.id for f in firmware]
 
 
 @protected_route(
diff --git a/backend/endpoints/platform.py b/backend/endpoints/platform.py
index 9f77f766d..cfa497698 100644
--- a/backend/endpoints/platform.py
+++ b/backend/endpoints/platform.py
@@ -16,6 +16,7 @@ from handler.scan_handler import scan_platform
 from logger.formatter import BLUE
 from logger.formatter import highlight as hl
 from logger.logger import log
+from models.platform import Platform
 from utils.platforms import get_supported_platforms
 from utils.router import APIRouter
 
@@ -60,10 +61,20 @@ def get_platforms(
 ) -> list[PlatformSchema]:
     """Retrieve platforms."""
 
-    return [
-        PlatformSchema.model_validate(p)
-        for p in db_platform_handler.get_platforms(updated_after=updated_after)
-    ]
+    platforms = db_platform_handler.get_platforms(updated_after=updated_after)
+    return [PlatformSchema.model_validate(p) for p in platforms]
+
+
+@protected_route(router.get, "/identifiers", [Scope.PLATFORMS_READ])
+def get_platform_identifiers(
+    request: Request,
+) -> list[int]:
+    """Retrieve platform identifiers."""
+
+    platforms = db_platform_handler.get_platforms(
+        only_fields=[Platform.id],
+    )
+    return [p.id for p in platforms]
 
 
 @protected_route(router.get, "/supported", [Scope.PLATFORMS_READ])
diff --git a/backend/endpoints/rom.py b/backend/endpoints/rom.py
index 54b13bbf3..6fa00628c 100644
--- a/backend/endpoints/rom.py
+++ b/backend/endpoints/rom.py
@@ -66,7 +66,7 @@ from handler.metadata.ss_handler import get_preferred_media_types
 from logger.formatter import BLUE
 from logger.formatter import highlight as hl
 from logger.logger import log
-from models.rom import Rom
+from models.rom import Rom, RomNote
 from utils.database import safe_int, safe_str_to_bool
 from utils.filesystem import sanitize_filename
 from utils.hashing import crc32_to_hex
@@ -517,6 +517,19 @@ def get_roms(
         )
 
 
+@protected_route(router.get, "/identifiers", [Scope.ROMS_READ])
+def get_rom_identifiers(
+    request: Request,
+) -> list[int]:
+    """Retrieve rom identifiers."""
+    db_roms = db_rom_handler.get_roms_scalar(
+        user_id=request.user.id,
+        only_fields=[Rom.id],
+    )
+
+    return [r.id for r in db_roms]
+
+
 @protected_route(
     router.get,
     "/download",
@@ -1633,8 +1646,8 @@ async def get_rom_notes(
     request: Request,
     id: Annotated[int, PathVar(description="Rom internal id.", ge=1)],
     public_only: bool = DEFAULT_PUBLIC_ONLY,
-    search: str = DEFAULT_SEARCH,
-    tags: list[str] = DEFAULT_TAGS,
+    search: str | None = DEFAULT_SEARCH,
+    tags: list[str] | None = DEFAULT_TAGS,
 ) -> list[UserNoteSchema]:
     """Get all notes for a ROM."""
     from handler.database import db_rom_handler
@@ -1657,6 +1670,32 @@ async def get_rom_notes(
     return [UserNoteSchema.model_validate(note) for note in notes]
 
 
+@protected_route(
+    router.get,
+    "/{id}/notes/identifiers",
+    [Scope.ROMS_READ],
+    responses={status.HTTP_404_NOT_FOUND: {}},
+)
+async def get_rom_note_identifiers(
+    request: Request,
+    id: Annotated[int, PathVar(description="Rom internal id.", ge=1)],
+) -> list[int]:
+    """Get all note identifiers for a ROM."""
+    from handler.database import db_rom_handler
+
+    rom = db_rom_handler.get_rom(id)
+    if not rom:
+        raise RomNotFoundInDatabaseException(id)
+
+    notes = db_rom_handler.get_rom_notes(
+        rom_id=id,
+        user_id=request.user.id,
+        only_fields=[RomNote.id],
+    )
+
+    return [note.id for note in notes]
+
+
 @protected_route(
     router.post,
     "/{id}/notes",
diff --git a/backend/endpoints/saves.py b/backend/endpoints/saves.py
index 46d465616..a6bc2f460 100644
--- a/backend/endpoints/saves.py
+++ b/backend/endpoints/saves.py
@@ -1,7 +1,7 @@
 from datetime import datetime, timezone
 from typing import Annotated
 
-from fastapi import Body, HTTPException, Request, UploadFile, status
+from fastapi import Body, HTTPException, Query, Request, UploadFile, status
 
 from decorators.auth import protected_route
 from endpoints.responses.assets import SaveSchema
@@ -13,6 +13,7 @@ from handler.scan_handler import scan_save, scan_screenshot
 from logger.formatter import BLUE
 from logger.formatter import highlight as hl
 from logger.logger import log
+from models.assets import Save
 from utils.router import APIRouter
 
 router = APIRouter(
@@ -142,15 +143,39 @@ async def add_save(
 
 @protected_route(router.get, "", [Scope.ASSETS_READ])
 def get_saves(
-    request: Request, rom_id: int | None = None, platform_id: int | None = None
+    request: Request,
+    rom_id: int | None = None,
+    platform_id: int | None = None,
 ) -> list[SaveSchema]:
     saves = db_save_handler.get_saves(
-        user_id=request.user.id, rom_id=rom_id, platform_id=platform_id
+        user_id=request.user.id,
+        rom_id=rom_id,
+        platform_id=platform_id,
     )
 
     return [SaveSchema.model_validate(save) for save in saves]
 
 
+@protected_route(router.get, "/identifiers", [Scope.ASSETS_READ])
+def get_save_identifiers(
+    request: Request,
+) -> list[int]:
+    """Get save identifiers endpoint
+
+    Args:
+        request (Request): Fastapi Request object
+
+    Returns:
+        list[int]: List of save ids
+    """
+    saves = db_save_handler.get_saves(
+        user_id=request.user.id,
+        only_fields=[Save.id],
+    )
+
+    return [save.id for save in saves]
+
+
 @protected_route(router.get, "/{id}", [Scope.ASSETS_READ])
 def get_save(request: Request, id: int) -> SaveSchema:
     save = db_save_handler.get_save(user_id=request.user.id, id=id)
diff --git a/backend/endpoints/states.py b/backend/endpoints/states.py
index f26d6d857..bb46e6536 100644
--- a/backend/endpoints/states.py
+++ b/backend/endpoints/states.py
@@ -1,7 +1,7 @@
 from datetime import datetime, timezone
 from typing import Annotated
 
-from fastapi import Body, HTTPException, Request, UploadFile, status
+from fastapi import Body, HTTPException, Query, Request, UploadFile, status
 
 from decorators.auth import protected_route
 from endpoints.responses.assets import StateSchema
@@ -13,6 +13,7 @@ from handler.scan_handler import scan_screenshot, scan_state
 from logger.formatter import BLUE
 from logger.formatter import highlight as hl
 from logger.logger import log
+from models.assets import State
 from utils.router import APIRouter
 
 router = APIRouter(
@@ -144,15 +145,39 @@ async def add_state(
 
 @protected_route(router.get, "", [Scope.ASSETS_READ])
 def get_states(
-    request: Request, rom_id: int | None = None, platform_id: int | None = None
+    request: Request,
+    rom_id: int | None = None,
+    platform_id: int | None = None,
 ) -> list[StateSchema]:
     states = db_state_handler.get_states(
-        user_id=request.user.id, rom_id=rom_id, platform_id=platform_id
+        user_id=request.user.id,
+        rom_id=rom_id,
+        platform_id=platform_id,
     )
 
     return [StateSchema.model_validate(state) for state in states]
 
 
+@protected_route(router.get, "/identifiers", [Scope.ASSETS_READ])
+def get_state_identifiers(
+    request: Request,
+) -> list[int]:
+    """Get state identifiers endpoint
+
+    Args:
+        request (Request): Fastapi Request object
+
+    Returns:
+        list[int]: List of state ids
+    """
+    states = db_state_handler.get_states(
+        user_id=request.user.id,
+        only_fields=[State.id],
+    )
+
+    return [state.id for state in states]
+
+
 @protected_route(router.get, "/{id}", [Scope.ASSETS_READ])
 def get_state(request: Request, id: int) -> StateSchema:
     state = db_state_handler.get_state(user_id=request.user.id, id=id)
diff --git a/backend/endpoints/user.py b/backend/endpoints/user.py
index 48d31151f..5684ec881 100644
--- a/backend/endpoints/user.py
+++ b/backend/endpoints/user.py
@@ -3,7 +3,7 @@ from typing import Annotated, Any, cast
 
 from fastapi import Body, Form, HTTPException
 from fastapi import Path as PathVar
-from fastapi import Request, status
+from fastapi import Query, Request, status
 
 from decorators.auth import protected_route
 from endpoints.forms.identity import UserForm
@@ -199,7 +199,9 @@ def create_user_from_invite(
 
 
 @protected_route(router.get, "", [Scope.USERS_READ])
-def get_users(request: Request) -> list[UserSchema]:
+def get_users(
+    request: Request,
+) -> list[UserSchema]:
     """Get all users endpoint
 
     Args:
@@ -209,7 +211,27 @@ def get_users(request: Request) -> list[UserSchema]:
         list[UserSchema]: All users stored in the RomM's database
     """
 
-    return [UserSchema.model_validate(u) for u in db_user_handler.get_users()]
+    users = db_user_handler.get_users()
+    return [UserSchema.model_validate(u) for u in users]
+
+
+@protected_route(router.get, "/identifiers", [Scope.USERS_READ])
+def get_user_identifiers(
+    request: Request,
+) -> list[int]:
+    """Get all user identifiers endpoint
+
+    Args:
+        request (Request): Fastapi Request object
+
+    Returns:
+        list[int]: All user ids stored in the RomM's database
+    """
+
+    users = db_user_handler.get_users(
+        only_fields=[User.id],
+    )
+    return [u.id for u in users]
 
 
 @protected_route(router.get, "/me", [Scope.ME_READ])
diff --git a/backend/handler/database/collections_handler.py b/backend/handler/database/collections_handler.py
index 571b61042..3b6da308f 100644
--- a/backend/handler/database/collections_handler.py
+++ b/backend/handler/database/collections_handler.py
@@ -169,20 +169,17 @@ class DBCollectionsHandler(DBBaseHandler):
         self,
         type: str,
         limit: int | None = None,
-        only_fields: Sequence[QueryableAttribute] | None = None,
         session: Session = None,  # type: ignore
     ) -> Sequence[VirtualCollection]:
-        return (
-            session.scalars(
-                select(VirtualCollection)
-                .filter(or_(VirtualCollection.type == type, literal(type == "all")))
-                .limit(limit)
-                .order_by(VirtualCollection.name.asc())
-            )
-            .unique()
-            .all()
+        query = (
+            select(VirtualCollection)
+            .filter(or_(VirtualCollection.type == type, literal(type == "all")))
+            .limit(limit)
+            .order_by(VirtualCollection.name.asc())
         )
 
+        return session.scalars(query).unique().all()
+
     # Smart collections
     @begin_session
     def add_smart_collection(
@@ -233,6 +230,9 @@ class DBCollectionsHandler(DBBaseHandler):
         if updated_after:
             query = query.filter(SmartCollection.updated_at > updated_after)
 
+        if only_fields:
+            query = query.options(load_only(*only_fields))
+
         return session.scalars(query).unique().all()
 
     @begin_session
diff --git a/backend/handler/database/roms_handler.py b/backend/handler/database/roms_handler.py
index 07312f15b..69d7db444 100644
--- a/backend/handler/database/roms_handler.py
+++ b/backend/handler/database/roms_handler.py
@@ -1061,7 +1061,7 @@ class DBRomsHandler(DBBaseHandler):
         rom_id: int,
         user_id: int,
         public_only: bool = False,
-        search: str = "",
+        search: str | None = "",
         tags: list[str] | None = None,
         only_fields: Sequence[QueryableAttribute] | None = None,
         session: Session = None,  # type: ignore