diff --git a/build.gradle.kts b/build.gradle.kts
index c315e51..4392d4c 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -51,6 +51,7 @@ subprojects {
             jvmTarget = "17"
             apiVersion = "1.9"
             languageVersion = "1.9"
+            freeCompilerArgs += "-Xuse-ir"
         }
     }
 
diff --git a/konfy-ssm/build.gradle.kts b/konfy-ssm/build.gradle.kts
index 0f0a8e0..0ae1fe6 100644
--- a/konfy-ssm/build.gradle.kts
+++ b/konfy-ssm/build.gradle.kts
@@ -5,6 +5,15 @@ dependencies {
     api(project(":konfy"))
 
     api("com.amazonaws", "aws-java-sdk-ssm", "1.12.655")
+    implementation("org.slf4j:slf4j-api:1.7.36")
+
+    testImplementation("org.testng", "testng", "7.9.0")
+    testImplementation("org.assertj", "assertj-core", "3.25.3")
+    testImplementation("io.mockk", "mockk", "1.13.9")
+    testImplementation("ch.qos.logback:logback-classic:1.5.0")
 }
 
+tasks.test {
+    useTestNG()
+}
 
diff --git a/konfy-ssm/src/main/kotlin/tanvd/konfy/ssm/SsmProvider.kt b/konfy-ssm/src/main/kotlin/tanvd/konfy/ssm/SsmProvider.kt
index 2f99840..3e38fc3 100644
--- a/konfy-ssm/src/main/kotlin/tanvd/konfy/ssm/SsmProvider.kt
+++ b/konfy-ssm/src/main/kotlin/tanvd/konfy/ssm/SsmProvider.kt
@@ -3,10 +3,13 @@ package tanvd.konfy.ssm
 import com.amazonaws.services.simplesystemsmanagement.AWSSimpleSystemsManagement
 import com.amazonaws.services.simplesystemsmanagement.model.GetParameterRequest
 import com.amazonaws.services.simplesystemsmanagement.model.ParameterNotFoundException
+import org.slf4j.LoggerFactory
 import tanvd.konfy.conversion.ConversionService
 import tanvd.konfy.provider.ConfigProvider
 import java.lang.reflect.Type
 
+private const val KONFY_LOG_KEYS = "KONFY_LOG_KEYS"
+
 /**
  * Provider takes values from AWS SSM.
  * Each key will be prepended with a prefix (with a slash after it) -- "${prefix}/${key}"
@@ -17,8 +20,21 @@ import java.lang.reflect.Type
 class SsmProvider(private val prefix: String?, private val separator: String,
                   private val ssm: AWSSimpleSystemsManagement = SsmClient.defaultClient,
                   private val convert: (String, Type) -> Any? = ConversionService::convert) : ConfigProvider() {
+
+    private val logger = LoggerFactory.getLogger(SsmProvider::class.java)
+    private val konfyLogKeys = (System.getenv(KONFY_LOG_KEYS) ?: System.getProperty(KONFY_LOG_KEYS))
+        ?.split(",")
+        ?.map { it.trim() }.orEmpty()
+
+    init {
+        logger.info("SsmProvider initialized.")
+        logger.info("Konfy log keys: $konfyLogKeys")
+    }
+
     @Suppress("UNCHECKED_CAST")
     override fun <N : Any> fetch(key: String, type: Type): N? {
+        log(key)
+
         val fullKey = (prefix?.let { "$it/$key" } ?: key).replace(separator, "/")
         val request = GetParameterRequest().withName(fullKey).withWithDecryption(true)
         return try {
@@ -27,4 +43,12 @@ class SsmProvider(private val prefix: String?, private val separator: String,
             null
         }
     }
+
+    private fun log(key: String) {
+        if (konfyLogKeys.contains(key)) {
+            val stackTrace = Thread.currentThread().stackTrace.joinToString("\n")
+            logger.info("Fetching parameter with key: $key \n Stack trace: \n $stackTrace")
+        }
+    }
+
 }
diff --git a/konfy-ssm/src/test/kotlin/SsmProviderTest.kt b/konfy-ssm/src/test/kotlin/SsmProviderTest.kt
new file mode 100644
index 0000000..78f5d09
--- /dev/null
+++ b/konfy-ssm/src/test/kotlin/SsmProviderTest.kt
@@ -0,0 +1,38 @@
+import com.amazonaws.services.simplesystemsmanagement.AWSSimpleSystemsManagement
+import io.mockk.mockk
+import org.testng.Assert.assertTrue
+import org.testng.annotations.Test
+import tanvd.konfy.ssm.SsmProvider
+import java.io.ByteArrayOutputStream
+import java.io.PrintStream
+
+class SsmProviderTest {
+
+    @Test
+    fun shouldPrintCorrectLogMessage() {
+        val oldOut = System.out
+        val konfyLogKeysParam = "KONFY_LOG_KEYS"
+        try {
+            //given
+            val key = "testKey"
+            System.setProperty(konfyLogKeysParam, key)
+            val logMessage = "Fetching parameter with key: $key \n Stack trace:"
+            val management: AWSSimpleSystemsManagement = mockk(relaxed = true)
+            val provider = SsmProvider(null, ".", management)
+
+            val consoleOutput = ByteArrayOutputStream()
+            val ps = PrintStream(consoleOutput)
+            System.setOut(ps)
+
+            //when
+            provider.fetch<String>(key, String::class.java)
+            assertTrue(consoleOutput.toString().contains(logMessage))
+
+            //then
+        } finally {
+            System.clearProperty(konfyLogKeysParam)
+            System.setOut(oldOut)
+        }
+    }
+
+}
diff --git a/konfy-ssm/src/test/resources/logback.xml b/konfy-ssm/src/test/resources/logback.xml
new file mode 100644
index 0000000..114f332
--- /dev/null
+++ b/konfy-ssm/src/test/resources/logback.xml
@@ -0,0 +1,15 @@
+<configuration>
+    <statusListener class="ch.qos.logback.core.status.OnConsoleStatusListener" />
+
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <logger name="tanvd.konfy.ssm.SsmProvider" level="trace" />
+
+    <root level="info">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>