diff --git a/sdk-license/README.md b/sdk-license/README.md
index 661e7d5..f02c89b 100644
--- a/sdk-license/README.md
+++ b/sdk-license/README.md
@@ -46,6 +46,21 @@ LicenseSDK.checkLicense { isValid ->
 }
 ```
 
+Optional user metadata can be uploaded during the same check. All fields are optional.
+
+```kotlin
+LicenseSDK.checkLicense(
+    userInfo = LicenseUserInfo(
+        userId = "u_10001",
+        name = "张三",
+        email = "zhangsan@example.com",
+        phone = "13800000000",
+    ),
+) { isValid ->
+    // allow or block app usage
+}
+```
+
 ### Get Status (no network)
 
 ```kotlin
diff --git a/sdk-license/src/main/java/com/xuqm/sdk/license/LicenseSDK.kt b/sdk-license/src/main/java/com/xuqm/sdk/license/LicenseSDK.kt
index d886827..a373dce 100644
--- a/sdk-license/src/main/java/com/xuqm/sdk/license/LicenseSDK.kt
+++ b/sdk-license/src/main/java/com/xuqm/sdk/license/LicenseSDK.kt
@@ -7,6 +7,7 @@ import com.xuqm.sdk.license.internal.LicenseContextHolder
 import com.xuqm.sdk.license.internal.LicenseFileReader
 import com.xuqm.sdk.license.internal.LicenseHttpClient
 import com.xuqm.sdk.license.model.RegisterRequest
+import com.xuqm.sdk.license.model.LicenseUserInfo
 import com.xuqm.sdk.license.model.VerifyRequest
 import com.xuqm.sdk.license.store.LicenseStore
 import kotlinx.coroutines.CoroutineScope
@@ -68,9 +69,10 @@ object LicenseSDK {
     }
 
     @JvmStatic
-    fun checkLicense(callback: LicenseCallback) {
+    @JvmOverloads
+    fun checkLicense(userInfo: LicenseUserInfo? = null, callback: LicenseCallback) {
         sdkScope.launch {
-            val valid = when (checkLicense()) {
+            val valid = when (checkLicense(userInfo)) {
                 is LicenseResult.Success -> true
                 is LicenseResult.Error -> false
             }
@@ -88,7 +90,8 @@ object LicenseSDK {
      *
      * @return LicenseResult.Success if license is valid, LicenseResult.Error otherwise
      */
-    suspend fun checkLicense(): LicenseResult = withContext(Dispatchers.IO) {
+    @JvmStatic
+    suspend fun checkLicense(userInfo: LicenseUserInfo? = null): LicenseResult = withContext(Dispatchers.IO) {
         ensureInitialized()
 
         // Check cached status
@@ -109,6 +112,7 @@ object LicenseSDK {
                         companyId = config.appKey,
                         deviceId = deviceId,
                         token = token,
+                        userInfo = userInfo,
                     )
                 )
 
@@ -130,6 +134,7 @@ object LicenseSDK {
                     deviceModel = DeviceInfoProvider.getDeviceModel(),
                     deviceVendor = DeviceInfoProvider.getDeviceVendor(),
                     osVersion = DeviceInfoProvider.getOsVersion(),
+                    userInfo = userInfo,
                 )
             )
 
@@ -153,12 +158,12 @@ object LicenseSDK {
     /**
      * Force re-register the device (e.g., after token revocation).
      */
-    suspend fun reRegister(): LicenseResult = withContext(Dispatchers.IO) {
+    suspend fun reRegister(userInfo: LicenseUserInfo? = null): LicenseResult = withContext(Dispatchers.IO) {
         requireInit()
         store.token = null
         store.status = null
         store.statusTime = 0
-        checkLicense()
+        checkLicense(userInfo)
     }
 
     /**
diff --git a/sdk-license/src/main/java/com/xuqm/sdk/license/model/LicenseModels.kt b/sdk-license/src/main/java/com/xuqm/sdk/license/model/LicenseModels.kt
index 2c034bd..2066e17 100644
--- a/sdk-license/src/main/java/com/xuqm/sdk/license/model/LicenseModels.kt
+++ b/sdk-license/src/main/java/com/xuqm/sdk/license/model/LicenseModels.kt
@@ -9,6 +9,7 @@ data class RegisterRequest(
     @SerializedName("deviceModel") val deviceModel: String? = null,
     @SerializedName("deviceVendor") val deviceVendor: String? = null,
     @SerializedName("osVersion") val osVersion: String? = null,
+    @SerializedName("userInfo") val userInfo: LicenseUserInfo? = null,
 )
 
 data class RegisterResponse(
@@ -21,6 +22,7 @@ data class VerifyRequest(
     @SerializedName("companyId") val companyId: String,
     @SerializedName("deviceId") val deviceId: String,
     val token: String,
+    @SerializedName("userInfo") val userInfo: LicenseUserInfo? = null,
 )
 
 data class VerifyResponse(
@@ -34,3 +36,10 @@ data class ApiResponse<T>(
     val data: T? = null,
     val message: String? = null,
 )
+
+data class LicenseUserInfo(
+    @SerializedName("userId") val userId: String? = null,
+    @SerializedName("name") val name: String? = null,
+    @SerializedName("email") val email: String? = null,
+    @SerializedName("phone") val phone: String? = null,
+)