diff --git a/app/src/main/assets/tangem-app-config b/app/src/main/assets/tangem-app-config
index feec295055..59ee0bff06 160000
--- a/app/src/main/assets/tangem-app-config
+++ b/app/src/main/assets/tangem-app-config
@@ -1 +1 @@
-Subproject commit feec2950551a1dbabbb018b446b25e17442db21f
+Subproject commit 59ee0bff06ee54f3202421c28f7fb6e3d421dad8
diff --git a/app/src/main/java/com/tangem/tap/common/redux/global/GlobalMidlleware.kt b/app/src/main/java/com/tangem/tap/common/redux/global/GlobalMidlleware.kt
index 9777538858..2a12c999bf 100644
--- a/app/src/main/java/com/tangem/tap/common/redux/global/GlobalMidlleware.kt
+++ b/app/src/main/java/com/tangem/tap/common/redux/global/GlobalMidlleware.kt
@@ -91,7 +91,7 @@ private fun handleAction(action: Action, appState: () -> AppState?, dispatch: Di
                 config?.moonPayApiSecretKey,
             ) { mercuryoWidgetId, moonPayKey, moonPaySecretKey ->
                 scope.launch {
-                    val buyService = MercuryoService(MercuryoApi.API_VERSION, mercuryoWidgetId)
+                    val buyService = MercuryoService(MercuryoApi.API_VERSION, mercuryoWidgetId, "")
                     val sellService = MoonPayService(moonPayKey, moonPaySecretKey)
                     val exchangeManager = CurrencyExchangeManager(buyService, sellService)
                     store.dispatchOnMain(GlobalAction.ExchangeManager.Init.Success(exchangeManager))
diff --git a/app/src/main/java/com/tangem/tap/domain/configurable/config/ConfigManager.kt b/app/src/main/java/com/tangem/tap/domain/configurable/config/ConfigManager.kt
index 7cddf2598a..d0e7bb9584 100644
--- a/app/src/main/java/com/tangem/tap/domain/configurable/config/ConfigManager.kt
+++ b/app/src/main/java/com/tangem/tap/domain/configurable/config/ConfigManager.kt
@@ -13,6 +13,7 @@ data class Config(
     val moonPayApiKey: String = "pk_test_kc90oYTANy7UQdBavDKGfL4K9l6VEPE",
     val moonPayApiSecretKey: String = "sk_test_V8w4M19LbDjjYOt170s0tGuvXAgyEb1C",
     val mercuryoWidgetId: String = "",
+    val mercuryoSecret: String = "",
     val appsFlyerDevKey: String = "",
     val blockchainSdkConfig: BlockchainSdkConfig = BlockchainSdkConfig(),
     val isSendingToPayIdEnabled: Boolean = true,
@@ -98,6 +99,7 @@ class ConfigManager(
             moonPayApiKey = values.moonPayApiKey,
             moonPayApiSecretKey = values.moonPayApiSecretKey,
             mercuryoWidgetId = values.mercuryoWidgetId,
+            mercuryoSecret = values.mercuryoSecret,
             blockchainSdkConfig = BlockchainSdkConfig(
                 blockchairApiKey = values.blockchairApiKey,
                 blockchairAuthorizationToken = values.blockchairAuthorizationToken,
diff --git a/app/src/main/java/com/tangem/tap/domain/configurable/config/JsonModels.kt b/app/src/main/java/com/tangem/tap/domain/configurable/config/JsonModels.kt
index d7be703460..f9e053ee98 100644
--- a/app/src/main/java/com/tangem/tap/domain/configurable/config/JsonModels.kt
+++ b/app/src/main/java/com/tangem/tap/domain/configurable/config/JsonModels.kt
@@ -16,6 +16,7 @@ class FeatureModel(
 class ConfigValueModel(
         val coinMarketCapKey: String,
         val mercuryoWidgetId: String,
+        val mercuryoSecret: String,
         val moonPayApiKey: String,
         val moonPayApiSecretKey: String,
         val blockchairApiKey: String?,
diff --git a/app/src/main/java/com/tangem/tap/network/exchangeServices/mercuryo/MercuryoService.kt b/app/src/main/java/com/tangem/tap/network/exchangeServices/mercuryo/MercuryoService.kt
index 9760849ed6..a0068b9ce1 100644
--- a/app/src/main/java/com/tangem/tap/network/exchangeServices/mercuryo/MercuryoService.kt
+++ b/app/src/main/java/com/tangem/tap/network/exchangeServices/mercuryo/MercuryoService.kt
@@ -2,6 +2,8 @@ package com.tangem.tap.network.exchangeServices.mercuryo
 
 import android.net.Uri
 import com.tangem.blockchain.common.Blockchain
+import com.tangem.common.extensions.calculateSha512
+import com.tangem.common.extensions.toHexString
 import com.tangem.common.services.Result
 import com.tangem.common.services.performRequest
 import com.tangem.network.common.createRetrofitInstance
@@ -18,6 +20,7 @@ import com.tangem.tap.network.exchangeServices.ExchangeUrlBuilder
 class MercuryoService(
     private val apiVersion: String,
     private val mercuryoWidgetId: String,
+    private val secret: String,
 ) : ExchangeService, ExchangeUrlBuilder {
 
     private val api: MercuryoApi = createRetrofitInstance(MercuryoApi.BASE_URL)
@@ -107,6 +110,7 @@ class MercuryoService(
             .appendQueryParameter("type", action.name.lowercase())
             .appendQueryParameter("currency", cryptoCurrencyName)
             .appendQueryParameter("address", walletAddress.urlEncode())
+            .appendQueryParameter("signature", signature(walletAddress).urlEncode())
             .appendQueryParameter("fix_currency", "true")
             .appendQueryParameter("return_url", ExchangeUrlBuilder.SUCCESS_URL)
 
@@ -114,6 +118,11 @@ class MercuryoService(
         return url
     }
 
+    private fun signature(address: String): String {
+        return (address + secret).calculateSha512().toHexString().lowercase()
+    }
+
+
     override fun getSellCryptoReceiptUrl(
         action: CurrencyExchangeManager.Action,
         transactionId: String