diff --git a/core/datasource/src/main/java/com/tangem/datasource/api/common/config/ApiEnvironment.kt b/core/datasource/src/main/java/com/tangem/datasource/api/common/config/ApiEnvironment.kt
index c6e72a8a75..755887fd7f 100644
--- a/core/datasource/src/main/java/com/tangem/datasource/api/common/config/ApiEnvironment.kt
+++ b/core/datasource/src/main/java/com/tangem/datasource/api/common/config/ApiEnvironment.kt
@@ -16,6 +16,9 @@ enum class ApiEnvironment {
     @Json(name = "DEV_2")
     DEV_2,
 
+    @Json(name = "DEV_3")
+    DEV_3,
+
     @Json(name = "STAGE")
     STAGE,
 
diff --git a/core/datasource/src/main/java/com/tangem/datasource/api/common/config/Express.kt b/core/datasource/src/main/java/com/tangem/datasource/api/common/config/Express.kt
index 23b46cf40b..6d4b9a1e5a 100644
--- a/core/datasource/src/main/java/com/tangem/datasource/api/common/config/Express.kt
+++ b/core/datasource/src/main/java/com/tangem/datasource/api/common/config/Express.kt
@@ -28,6 +28,7 @@ internal class Express(
     override val environmentConfigs: List<ApiEnvironmentConfig> = listOf(
         createDevEnvironment(),
         createDev2Environment(),
+        createDev3Environment(),
         createStageEnvironment(),
         createMockedEnvironment(),
         createProdEnvironment(),
@@ -60,6 +61,12 @@ internal class Express(
         headers = createHeaders(isProd = false),
     )
 
+    private fun createDev3Environment(): ApiEnvironmentConfig = ApiEnvironmentConfig(
+        environment = ApiEnvironment.DEV_3,
+        baseUrl = "[REDACTED_ENV_URL]",
+        headers = createHeaders(isProd = false),
+    )
+
     private fun createStageEnvironment(): ApiEnvironmentConfig = ApiEnvironmentConfig(
         environment = ApiEnvironment.STAGE,
         baseUrl = "[REDACTED_ENV_URL]",
diff --git a/core/datasource/src/main/java/com/tangem/datasource/api/common/config/TangemTech.kt b/core/datasource/src/main/java/com/tangem/datasource/api/common/config/TangemTech.kt
index 4a8e1db349..8d44291374 100644
--- a/core/datasource/src/main/java/com/tangem/datasource/api/common/config/TangemTech.kt
+++ b/core/datasource/src/main/java/com/tangem/datasource/api/common/config/TangemTech.kt
@@ -73,6 +73,7 @@ internal class TangemTech(
             ApiEnvironment.MOCK,
             ApiEnvironment.DEV,
             ApiEnvironment.DEV_2,
+            ApiEnvironment.DEV_3,
             -> environmentConfigStorage.getConfigSync().tangemApiKeyDev
             ApiEnvironment.STAGE -> environmentConfigStorage.getConfigSync().tangemApiKeyStage
             ApiEnvironment.PROD -> environmentConfigStorage.getConfigSync().tangemApiKey
diff --git a/data/visa/src/main/kotlin/com/tangem/data/pay/repository/DefaultCardDetailsRepository.kt b/data/visa/src/main/kotlin/com/tangem/data/pay/repository/DefaultCardDetailsRepository.kt
index 97b84bd4e9..2875b51a63 100644
--- a/data/visa/src/main/kotlin/com/tangem/data/pay/repository/DefaultCardDetailsRepository.kt
+++ b/data/visa/src/main/kotlin/com/tangem/data/pay/repository/DefaultCardDetailsRepository.kt
@@ -74,6 +74,7 @@ internal class DefaultCardDetailsRepository @Inject constructor(
         return when (env) {
             ApiEnvironment.DEV,
             ApiEnvironment.DEV_2,
+            ApiEnvironment.DEV_3,
             ApiEnvironment.STAGE,
             ApiEnvironment.MOCK,
             -> visaLibLoader.getOrCreateConfig().rainRSAPublicKey.dev
diff --git a/data/visa/src/main/kotlin/com/tangem/data/visa/DefaultVisaActivationRepository.kt b/data/visa/src/main/kotlin/com/tangem/data/visa/DefaultVisaActivationRepository.kt
index 939794afce..a227353e33 100644
--- a/data/visa/src/main/kotlin/com/tangem/data/visa/DefaultVisaActivationRepository.kt
+++ b/data/visa/src/main/kotlin/com/tangem/data/visa/DefaultVisaActivationRepository.kt
@@ -169,6 +169,7 @@ internal class DefaultVisaActivationRepository @AssistedInject constructor(
         return when (env) {
             ApiEnvironment.DEV,
             ApiEnvironment.DEV_2,
+            ApiEnvironment.DEV_3,
             ApiEnvironment.STAGE,
             ApiEnvironment.MOCK,
             -> rsaPublicKey.dev
diff --git a/features/tester/impl/src/main/java/com/tangem/feature/tester/presentation/environments/ui/EnvironmentTogglesScreen.kt b/features/tester/impl/src/main/java/com/tangem/feature/tester/presentation/environments/ui/EnvironmentTogglesScreen.kt
index 21a0d5aad5..02d68f4f73 100644
--- a/features/tester/impl/src/main/java/com/tangem/feature/tester/presentation/environments/ui/EnvironmentTogglesScreen.kt
+++ b/features/tester/impl/src/main/java/com/tangem/feature/tester/presentation/environments/ui/EnvironmentTogglesScreen.kt
@@ -177,6 +177,7 @@ private fun PreviewFeatureTogglesScreen() {
                         environments = persistentSetOf(
                             ApiEnvironment.DEV.name,
                             ApiEnvironment.DEV_2.name,
+                            ApiEnvironment.DEV_3.name,
                             ApiEnvironment.STAGE.name,
                             ApiEnvironment.MOCK.name,
                             ApiEnvironment.PROD.name,
diff --git a/features/tester/impl/src/main/java/com/tangem/feature/tester/presentation/environments/utils/ApiEnvironmentComparator.kt b/features/tester/impl/src/main/java/com/tangem/feature/tester/presentation/environments/utils/ApiEnvironmentComparator.kt
index cdf172d0c4..ac81103c06 100644
--- a/features/tester/impl/src/main/java/com/tangem/feature/tester/presentation/environments/utils/ApiEnvironmentComparator.kt
+++ b/features/tester/impl/src/main/java/com/tangem/feature/tester/presentation/environments/utils/ApiEnvironmentComparator.kt
@@ -14,9 +14,10 @@ internal object ApiEnvironmentComparator : Comparator<ApiEnvironmentConfig> {
         when (it) {
             ApiEnvironment.DEV -> 0
             ApiEnvironment.DEV_2 -> 1
-            ApiEnvironment.STAGE -> 2
-            ApiEnvironment.MOCK -> 3
-            ApiEnvironment.PROD -> 4
+            ApiEnvironment.DEV_3 -> 2
+            ApiEnvironment.STAGE -> 3
+            ApiEnvironment.MOCK -> 4
+            ApiEnvironment.PROD -> 5
         }
     }