diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteWxaExtensions.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteWxaExtensions.cs
index ff6b6a49..7093d5c1 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteWxaExtensions.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteWxaExtensions.cs
@@ -940,6 +940,26 @@ namespace SKIT.FlurlHttpClient.Wechat.Api
 
             return await client.SendRequestWithJsonAsync<Models.WxaServiceMarketGetPaidOrderListResponse>(flurlReq, data: request, cancellationToken: cancellationToken);
         }
+
+        /// <summary>
+        /// <para>异步调用 [POST] /wxa/servicemarket/service/login_auth 接口。</para>
+        /// <para>REF: https://developers.weixin.qq.com/doc/oplatform/service_market/interface/value_added/servicemarket_login_auth.html </para>
+        /// </summary>
+        /// <param name="client"></param>
+        /// <param name="request"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public static async Task<Models.WxaServiceMarketServiceLoginAuthResponse> ExecuteWxaServiceMarketServiceLoginAuthAsync(this WechatApiClient client, Models.WxaServiceMarketServiceLoginAuthRequest request, CancellationToken cancellationToken = default)
+        {
+            if (client is null) throw new ArgumentNullException(nameof(client));
+            if (request is null) throw new ArgumentNullException(nameof(request));
+
+            IFlurlRequest flurlReq = client
+                .CreateRequest(request, HttpMethod.Post, "wxa", "servicemarket", "service", "login_auth")
+                .SetQueryParam("access_token", request.ComponentAccessToken);
+
+            return await client.SendRequestWithJsonAsync<Models.WxaServiceMarketServiceLoginAuthResponse>(flurlReq, data: request, cancellationToken: cancellationToken);
+        }
         #endregion
 
         #region ShortLink
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/CgibinExpress/Business/CgibinExpressBusinessOrderAddRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/CgibinExpress/Business/CgibinExpressBusinessOrderAddRequest.cs
index d1c3709f..839c436d 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/CgibinExpress/Business/CgibinExpressBusinessOrderAddRequest.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/CgibinExpress/Business/CgibinExpressBusinessOrderAddRequest.cs
@@ -1,4 +1,4 @@
-using System.Collections.Generic;
+using System.Collections.Generic;
 
 namespace SKIT.FlurlHttpClient.Wechat.Api.Models
 {
@@ -279,7 +279,7 @@ namespace SKIT.FlurlHttpClient.Wechat.Api.Models
         /// </summary>
         [Newtonsoft.Json.JsonProperty("openid")]
         [System.Text.Json.Serialization.JsonPropertyName("openid")]
-        public string? OpenID { get; set; }
+        public string? OpenId { get; set; }
 
         /// <summary>
         /// 获取或设置快递公司 ID。
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/CgibinExpress/Business/CgibinExpressBusinessOrderCancelRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/CgibinExpress/Business/CgibinExpressBusinessOrderCancelRequest.cs
index b4871740..a9ec8c7e 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/CgibinExpress/Business/CgibinExpressBusinessOrderCancelRequest.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/CgibinExpress/Business/CgibinExpressBusinessOrderCancelRequest.cs
@@ -1,4 +1,4 @@
-namespace SKIT.FlurlHttpClient.Wechat.Api.Models
+namespace SKIT.FlurlHttpClient.Wechat.Api.Models
 {
     /// <summary>
     /// <para>表示 [POST] /cgi-bin/express/business/order/cancel 接口的请求。</para>
@@ -17,7 +17,7 @@
         /// </summary>
         [Newtonsoft.Json.JsonProperty("openid")]
         [System.Text.Json.Serialization.JsonPropertyName("openid")]
-        public string? OpenID { get; set; }
+        public string? OpenId { get; set; }
 
         /// <summary>
         /// 获取或设置快递公司 ID。
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/CgibinExpress/Business/CgibinExpressBusinessOrderGetRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/CgibinExpress/Business/CgibinExpressBusinessOrderGetRequest.cs
index bb1d177d..759e891f 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/CgibinExpress/Business/CgibinExpressBusinessOrderGetRequest.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/CgibinExpress/Business/CgibinExpressBusinessOrderGetRequest.cs
@@ -1,4 +1,4 @@
-namespace SKIT.FlurlHttpClient.Wechat.Api.Models
+namespace SKIT.FlurlHttpClient.Wechat.Api.Models
 {
     /// <summary>
     /// <para>表示 [POST] /cgi-bin/express/business/order/get 接口的请求。</para>
@@ -17,7 +17,7 @@
         /// </summary>
         [Newtonsoft.Json.JsonProperty("openid")]
         [System.Text.Json.Serialization.JsonPropertyName("openid")]
-        public string? OpenID { get; set; }
+        public string? OpenId { get; set; }
 
         /// <summary>
         /// 获取或设置快递公司 ID。
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/CgibinExpress/Delivery/CgibinExpressDeliveryTemplatePreviewRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/CgibinExpress/Delivery/CgibinExpressDeliveryTemplatePreviewRequest.cs
index 29e019f2..db7dccaa 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/CgibinExpress/Delivery/CgibinExpressDeliveryTemplatePreviewRequest.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/CgibinExpress/Delivery/CgibinExpressDeliveryTemplatePreviewRequest.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 
@@ -69,7 +69,7 @@ namespace SKIT.FlurlHttpClient.Wechat.Api.Models
                 /// </summary>
                 [Newtonsoft.Json.JsonProperty("openid")]
                 [System.Text.Json.Serialization.JsonPropertyName("openid")]
-                public string? OpenID { get; set; }
+                public string? OpenId { get; set; }
 
                 /// <summary>
                 /// 获取或设置快递公司 ID。
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/CgibinExpress/LocalBusiness/CgibinExpressLocalBusinessOrderPreAddRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/CgibinExpress/LocalBusiness/CgibinExpressLocalBusinessOrderPreAddRequest.cs
index ae245686..654d6091 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/CgibinExpress/LocalBusiness/CgibinExpressLocalBusinessOrderPreAddRequest.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/CgibinExpress/LocalBusiness/CgibinExpressLocalBusinessOrderPreAddRequest.cs
@@ -1,4 +1,4 @@
-using System.Collections.Generic;
+using System.Collections.Generic;
 
 namespace SKIT.FlurlHttpClient.Wechat.Api.Models
 {
@@ -380,7 +380,7 @@ namespace SKIT.FlurlHttpClient.Wechat.Api.Models
         /// </summary>
         [Newtonsoft.Json.JsonProperty("openid")]
         [System.Text.Json.Serialization.JsonPropertyName("openid")]
-        public string OpenID { get; set; } = string.Empty;
+        public string OpenId { get; set; } = string.Empty;
 
         /// <summary>
         /// 获取或设置发件人信息。
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Product/Coupon/ProductCouponPushRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Product/Coupon/ProductCouponPushRequest.cs
index ce1d95a2..768dabd5 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Product/Coupon/ProductCouponPushRequest.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Product/Coupon/ProductCouponPushRequest.cs
@@ -1,4 +1,4 @@
-namespace SKIT.FlurlHttpClient.Wechat.Api.Models
+namespace SKIT.FlurlHttpClient.Wechat.Api.Models
 {
     /// <summary>
     /// <para>表示 [POST] /product/coupon/push 接口的请求。</para>
@@ -17,6 +17,6 @@
         /// </summary>
         [Newtonsoft.Json.JsonProperty("openid")]
         [System.Text.Json.Serialization.JsonPropertyName("openid")]
-        public string OpenID { get; set; } = string.Empty;
+        public string OpenId { get; set; } = string.Empty;
     }
 }
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Wxa/ServiceMarket/WxaServiceMarketServiceLoginAuthRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Wxa/ServiceMarket/WxaServiceMarketServiceLoginAuthRequest.cs
new file mode 100644
index 00000000..376fa2f0
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Wxa/ServiceMarket/WxaServiceMarketServiceLoginAuthRequest.cs
@@ -0,0 +1,22 @@
+namespace SKIT.FlurlHttpClient.Wechat.Api.Models
+{
+    /// <summary>
+    /// <para>表示 [POST] /wxa/servicemarket/service/login_auth 接口的请求。</para>
+    /// </summary>
+    public class WxaServiceMarketServiceLoginAuthRequest : WechatApiRequest, IInferable<WxaServiceMarketServiceLoginAuthRequest, WxaServiceMarketServiceLoginAuthResponse>
+    {
+        /// <summary>
+        /// 获取或设置第三方平台 AccessToken。
+        /// </summary>
+        [Newtonsoft.Json.JsonIgnore]
+        [System.Text.Json.Serialization.JsonIgnore]
+        public string ComponentAccessToken { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 获取或设置登录 Code。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("code")]
+        [System.Text.Json.Serialization.JsonPropertyName("code")]
+        public string Code { get; set; } = string.Empty;
+    }
+}
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Wxa/ServiceMarket/WxaServiceMarketServiceLoginAuthResponse.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Wxa/ServiceMarket/WxaServiceMarketServiceLoginAuthResponse.cs
new file mode 100644
index 00000000..86359809
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Wxa/ServiceMarket/WxaServiceMarketServiceLoginAuthResponse.cs
@@ -0,0 +1,52 @@
+namespace SKIT.FlurlHttpClient.Wechat.Api.Models
+{
+    /// <summary>
+    /// <para>表示 [POST] /wxa/servicemarket/service/login_auth 接口的响应。</para>
+    /// </summary>
+    public class WxaServiceMarketServiceLoginAuthResponse : WechatApiResponse
+    {
+        /// <summary>
+        /// 获取或设置订单 ID。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("order_id")]
+        [System.Text.Json.Serialization.JsonPropertyName("order_id")]
+        [System.Text.Json.Serialization.JsonNumberHandling(System.Text.Json.Serialization.JsonNumberHandling.AllowReadingFromString)]
+        public long OrderId { get; set; }
+
+        /// <summary>
+        /// 获取或设置小程序 AppId。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("appid")]
+        [System.Text.Json.Serialization.JsonPropertyName("appid")]
+        public string? AppId { get; set; }
+
+        /// <summary>
+        /// 获取或设置用户 OpenId。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("openid")]
+        [System.Text.Json.Serialization.JsonPropertyName("openid")]
+        public string? OpenId { get; set; }
+
+        /// <summary>
+        /// 获取或设置购买的服务 ID。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("service_id")]
+        [System.Text.Json.Serialization.JsonPropertyName("service_id")]
+        [System.Text.Json.Serialization.JsonConverter(typeof(System.Text.Json.Converters.NumericalStringReadOnlyConverter))]
+        public string ServiceId { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置购买的 SKU ID。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("sku_id")]
+        [System.Text.Json.Serialization.JsonPropertyName("sku_id")]
+        public string SKUId { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置购买的规格 ID。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("spec_id")]
+        [System.Text.Json.Serialization.JsonPropertyName("spec_id")]
+        public string SpecificationId { get; set; } = default!;
+    }
+}
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Wxa/ServiceMarket/WxaServiceMarketServiceLoginAuthRequest.json b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Wxa/ServiceMarket/WxaServiceMarketServiceLoginAuthRequest.json
new file mode 100644
index 00000000..655d51a5
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Wxa/ServiceMarket/WxaServiceMarketServiceLoginAuthRequest.json
@@ -0,0 +1,3 @@
+{
+    "code": "xxxx"
+}
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Wxa/ServiceMarket/WxaServiceMarketServiceLoginAuthResponse.json b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Wxa/ServiceMarket/WxaServiceMarketServiceLoginAuthResponse.json
new file mode 100644
index 00000000..84d019f2
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Wxa/ServiceMarket/WxaServiceMarketServiceLoginAuthResponse.json
@@ -0,0 +1,10 @@
+{
+    "errcode": 0,
+    "errmsg": "ok",
+    "order_id": 123,
+    "openid": "xxx",
+    "appid": "xxxx",
+    "service_id": 123,
+    "sku_id": "xxx",
+    "spec_id": "yyy"
+}