diff --git a/Authentication/MicrosoftAuthentication.cs b/Authentication/MicrosoftAuthentication.cs
index 945d28b..2cf28fe 100644
--- a/Authentication/MicrosoftAuthentication.cs
+++ b/Authentication/MicrosoftAuthentication.cs
@@ -104,6 +104,33 @@ public async ValueTask<GetTokenResponse> GetTokenResponse(RetrieveDeviceCode dev
                         ClientId = deviceCodeInfo.ClientId
                     };
             }
+            else
+            {
+                // 先判断是否正在等待中，直接使用 Contains，避免额外解析开销
+                if (!tokenJson.Contains("authorization_pending"))
+                {
+                    try
+                    {
+                        var errorData = tokenJson.ToJsonEntry<GetTokenErrorResponse>();
+                        switch (errorData.Error)
+                        {
+                            case "authorization_declined":
+                                throw new Exception("用户拒绝了授权");
+                            case "bad_verification_code":
+                                throw new Exception("提交的 device_code 无效");
+                            case "expired_token":
+                                throw new Exception("登录已超时,请重试"); // 避免轮询时正好过期导致抓不到异常
+                            default:
+                                throw new Exception(errorData.Error);
+                                // 实际上还有其他的错误类型，但按理说不会出现，比如 slow_down
+                        }
+                    }
+                    catch (Exception e)
+                    {
+                        throw new Exception("轮询获取 Token 错误：" + e.Message);
+                    }
+                }
+            }
 
             await Task.Delay(pollingInterval);
         }
@@ -124,7 +151,7 @@ public async ValueTask<MicrosoftAccount> MicrosoftAuthAsync(GetTokenResponse tok
         string? refreshToken = null)
     {
         if (refreshToken == null) return await GetMicrosoftAuthInfo(tokenInfo, action);
-        
+
         // 刷新令牌
         action("正在刷新令牌");
 
@@ -270,7 +297,7 @@ public async ValueTask<MicrosoftAccount> GetMicrosoftAuthInfo(GetTokenResponse t
 
         var minecraftProfile = profileContent.ToJsonEntry<MinecraftProfile>();
         if (minecraftProfile == null) throw new Exception("验证失败");
-        
+
         var uuid = minecraftProfile.Uuid;
         var name = minecraftProfile.Name;
         var skinUrl = minecraftProfile.Skins[0].Url;
diff --git a/Models/Authentication/GetTokenErrorResponse.cs b/Models/Authentication/GetTokenErrorResponse.cs
new file mode 100644
index 0000000..ded04c3
--- /dev/null
+++ b/Models/Authentication/GetTokenErrorResponse.cs
@@ -0,0 +1,16 @@
+using System.Text.Json.Serialization;
+
+namespace StarLight_Core.Models.Authentication;
+
+/// <summary>
+/// 令牌错误信息
+/// </summary>
+/// <a href="https://wiki.conlux.studio/Authentication/Microsoft.html#详细-gettokenresponse-定义">查看文档</a>
+public class GetTokenErrorResponse
+{
+    /// <summary>
+    /// 错误
+    /// </summary>
+    [JsonPropertyName("error")]
+    public string Error { get; set; }
+}
\ No newline at end of file
diff --git a/Skin/Fetchers/MicrosoftSkinFetcher.cs b/Skin/Fetchers/MicrosoftSkinFetcher.cs
index bbd068b..f942f5a 100644
--- a/Skin/Fetchers/MicrosoftSkinFetcher.cs
+++ b/Skin/Fetchers/MicrosoftSkinFetcher.cs
@@ -1,4 +1,5 @@
 using System.Text;
+using StarLight_Core.Models.Authentication;
 using StarLight_Core.Models.Skin;
 using StarLight_Core.Utilities;
 
@@ -9,6 +10,16 @@ namespace StarLight_Core.Skin.Fetchers;
 /// </summary>
 public class MicrosoftSkinFetcher
 {
+    /// <summary>
+    /// 获取微软皮肤
+    /// </summary>
+    /// <param name="account">皮肤图片字节信息</param>
+    /// <returns>皮肤图片字节信息</returns>
+    public static async Task<byte[]> GetMicrosoftSkinAsync(MicrosoftAccount account)
+    {
+        return await GetMicrosoftSkinAsync(account.Uuid);
+    }
+
     /// <summary>
     /// 获取微软皮肤
     /// </summary>
@@ -17,6 +28,7 @@ public class MicrosoftSkinFetcher
     public static async Task<byte[]> GetMicrosoftSkinAsync(string uuid)
     {
         const string baseUrl = "https://sessionserver.mojang.com/session/minecraft/profile/";
+        uuid = uuid.Replace("-", "");
         var skinJson = await HttpUtil.GetStringAsync(baseUrl + uuid);
         var skinUrl =
             Encoding.UTF8.GetString(
diff --git a/Skin/Fetchers/YggdrasilSkinFetcher.cs b/Skin/Fetchers/YggdrasilSkinFetcher.cs
new file mode 100644
index 0000000..5d622e2
--- /dev/null
+++ b/Skin/Fetchers/YggdrasilSkinFetcher.cs
@@ -0,0 +1,45 @@
+using StarLight_Core.Models.Authentication;
+using StarLight_Core.Models.Skin;
+using StarLight_Core.Utilities;
+using System.Security.Cryptography.X509Certificates;
+using System.Security.Principal;
+using System.Text;
+
+namespace StarLight_Core.Skin.Fetchers;
+
+/// <summary>
+/// 外置皮肤获取器
+/// </summary>
+public class YggdrasilSkinFetcher
+{
+    /// <summary>
+    /// 获取外置皮肤
+    /// </summary>
+    /// <param name="account">外置账户</param>
+    /// <returns>皮肤图片字节信息</returns>
+    public static async Task<byte[]> GetYggdrasilSkinAsync(YggdrasilAccount account)
+    {
+        return await GetYggdrasilSkinAsync(account.ServerUrl, account.Uuid);
+    }
+
+    /// <summary>
+    /// 获取外置皮肤
+    /// </summary>
+    /// <param name="serverUrl">服务器 Url</param>
+    /// <param name="uuid">外置账户 Uuid</param>
+    /// <returns>皮肤图片字节信息</returns>
+    public static async Task<byte[]> GetYggdrasilSkinAsync(string serverUrl, string uuid)
+    {
+        var baseUrl = serverUrl.TrimEnd("/");
+        uuid = uuid.Replace("-", "");
+        var skinJson = await HttpUtil.GetStringAsync($"{baseUrl}/sessionserver/session/minecraft/profile/{uuid}");
+        var skinUrl =
+            Encoding.UTF8.GetString(
+                    Convert.FromBase64String(
+                        skinJson.ToJsonEntry<ProfileJsonEntity>().Properties.First().Value))
+                .ToJsonEntry<SkinJsonEntity>()
+                .Textures.Skin.Url;
+        using var httpClient = new HttpClient();
+        return await httpClient.GetByteArrayAsync(skinUrl);
+    }
+}
\ No newline at end of file