diff --git a/Jellyfin.Api/Extensions/DtoExtensions.cs b/Jellyfin.Api/Extensions/DtoExtensions.cs
new file mode 100644
index 0000000000..4c587391fc
--- /dev/null
+++ b/Jellyfin.Api/Extensions/DtoExtensions.cs
@@ -0,0 +1,162 @@
+using System;
+using System.Linq;
+using Jellyfin.Api.Helpers;
+using MediaBrowser.Controller.Dto;
+using MediaBrowser.Model.Entities;
+using MediaBrowser.Model.Querying;
+using Microsoft.AspNetCore.Http;
+
+namespace Jellyfin.Api.Extensions
+{
+    /// <summary>
+    /// Dto Extensions.
+    /// </summary>
+    public static class DtoExtensions
+    {
+        /// <summary>
+        /// Add Dto Item fields.
+        /// </summary>
+        /// <remarks>
+        /// Converted from IHasItemFields.
+        /// Legacy order: 1.
+        /// </remarks>
+        /// <param name="dtoOptions">DtoOptions object.</param>
+        /// <param name="fields">Comma delimited string of fields.</param>
+        /// <returns>Modified DtoOptions object.</returns>
+        internal static DtoOptions AddItemFields(this DtoOptions dtoOptions, string fields)
+        {
+            if (string.IsNullOrEmpty(fields))
+            {
+                dtoOptions.Fields = Array.Empty<ItemFields>();
+            }
+            else
+            {
+                dtoOptions.Fields = fields.Split(',')
+                    .Select(v =>
+                    {
+                        if (Enum.TryParse(v, true, out ItemFields value))
+                        {
+                            return (ItemFields?)value;
+                        }
+
+                        return null;
+                    })
+                    .Where(i => i.HasValue)
+                    .Select(i => i!.Value)
+                    .ToArray();
+            }
+
+            return dtoOptions;
+        }
+
+        /// <summary>
+        /// Add additional fields depending on client.
+        /// </summary>
+        /// <remarks>
+        /// Use in place of GetDtoOptions.
+        /// Legacy order: 2.
+        /// </remarks>
+        /// <param name="dtoOptions">DtoOptions object.</param>
+        /// <param name="request">Current request.</param>
+        /// <returns>Modified DtoOptions object.</returns>
+        internal static DtoOptions AddClientFields(
+            this DtoOptions dtoOptions, HttpRequest request)
+        {
+            dtoOptions.Fields ??= Array.Empty<ItemFields>();
+
+            string? client = ClaimHelpers.GetClient(request.HttpContext.User);
+
+            // No client in claim
+            if (string.IsNullOrEmpty(client))
+            {
+                return dtoOptions;
+            }
+
+            if (!dtoOptions.ContainsField(ItemFields.RecursiveItemCount))
+            {
+                if (client.IndexOf("kodi", StringComparison.OrdinalIgnoreCase) != -1 ||
+                    client.IndexOf("wmc", StringComparison.OrdinalIgnoreCase) != -1 ||
+                    client.IndexOf("media center", StringComparison.OrdinalIgnoreCase) != -1 ||
+                    client.IndexOf("classic", StringComparison.OrdinalIgnoreCase) != -1)
+                {
+                    int oldLen = dtoOptions.Fields.Length;
+                    var arr = new ItemFields[oldLen + 1];
+                    dtoOptions.Fields.CopyTo(arr, 0);
+                    arr[oldLen] = ItemFields.RecursiveItemCount;
+                    dtoOptions.Fields = arr;
+                }
+            }
+
+            if (!dtoOptions.ContainsField(ItemFields.ChildCount))
+            {
+                if (client.IndexOf("kodi", StringComparison.OrdinalIgnoreCase) != -1 ||
+                    client.IndexOf("wmc", StringComparison.OrdinalIgnoreCase) != -1 ||
+                    client.IndexOf("media center", StringComparison.OrdinalIgnoreCase) != -1 ||
+                    client.IndexOf("classic", StringComparison.OrdinalIgnoreCase) != -1 ||
+                    client.IndexOf("roku", StringComparison.OrdinalIgnoreCase) != -1 ||
+                    client.IndexOf("samsung", StringComparison.OrdinalIgnoreCase) != -1 ||
+                    client.IndexOf("androidtv", StringComparison.OrdinalIgnoreCase) != -1)
+                {
+                    int oldLen = dtoOptions.Fields.Length;
+                    var arr = new ItemFields[oldLen + 1];
+                    dtoOptions.Fields.CopyTo(arr, 0);
+                    arr[oldLen] = ItemFields.ChildCount;
+                    dtoOptions.Fields = arr;
+                }
+            }
+
+            return dtoOptions;
+        }
+
+        /// <summary>
+        /// Add additional DtoOptions.
+        /// </summary>
+        /// <remarks>
+        /// Converted from IHasDtoOptions.
+        /// Legacy order: 3.
+        /// </remarks>
+        /// <param name="dtoOptions">DtoOptions object.</param>
+        /// <param name="enableImages">Enable images.</param>
+        /// <param name="enableUserData">Enable user data.</param>
+        /// <param name="imageTypeLimit">Image type limit.</param>
+        /// <param name="enableImageTypes">Enable image types.</param>
+        /// <returns>Modified DtoOptions object.</returns>
+        internal static DtoOptions AddAdditionalDtoOptions(
+            in DtoOptions dtoOptions,
+            bool? enableImages,
+            bool? enableUserData,
+            int? imageTypeLimit,
+            string enableImageTypes)
+        {
+            dtoOptions.EnableImages = enableImages ?? true;
+
+            if (imageTypeLimit.HasValue)
+            {
+                dtoOptions.ImageTypeLimit = imageTypeLimit.Value;
+            }
+
+            if (enableUserData.HasValue)
+            {
+                dtoOptions.EnableUserData = enableUserData.Value;
+            }
+
+            if (!string.IsNullOrWhiteSpace(enableImageTypes))
+            {
+                dtoOptions.ImageTypes = enableImageTypes.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries)
+                    .Select(v => (ImageType)Enum.Parse(typeof(ImageType), v, true))
+                    .ToArray();
+            }
+
+            return dtoOptions;
+        }
+
+        /// <summary>
+        /// Check if DtoOptions contains field.
+        /// </summary>
+        /// <param name="dtoOptions">DtoOptions object.</param>
+        /// <param name="field">Field to check.</param>
+        /// <returns>Field existence.</returns>
+        internal static bool ContainsField(this DtoOptions dtoOptions, ItemFields field)
+            => dtoOptions.Fields != null && dtoOptions.Fields.Contains(field);
+    }
+}