diff --git a/libraries/httpClient/src/main/kotlin/de/itkl/httpClient/BearerToken.kt b/libraries/httpClient/src/main/kotlin/de/itkl/httpClient/BearerToken.kt
new file mode 100644
index 0000000..20f94ea
--- /dev/null
+++ b/libraries/httpClient/src/main/kotlin/de/itkl/httpClient/BearerToken.kt
@@ -0,0 +1,10 @@
+package de.itkl.httpClient
+
+import kotlinx.datetime.Instant
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class BearerToken(
+    val tokenString: String,
+    val validUntil: Instant
+)
\ No newline at end of file
diff --git a/libraries/httpClient/src/main/kotlin/de/itkl/httpClient/BearerTokenCache.kt b/libraries/httpClient/src/main/kotlin/de/itkl/httpClient/BearerTokenCache.kt
new file mode 100644
index 0000000..cd1c1a1
--- /dev/null
+++ b/libraries/httpClient/src/main/kotlin/de/itkl/httpClient/BearerTokenCache.kt
@@ -0,0 +1,4 @@
+package de.itkl.httpClient
+
+class BearerTokenCache {
+}
\ No newline at end of file
diff --git a/libraries/httpClient/src/main/kotlin/de/itkl/httpClient/SmartCloudAuthPlugin.kt b/libraries/httpClient/src/main/kotlin/de/itkl/httpClient/SmartCloudAuthPlugin.kt
new file mode 100644
index 0000000..479e6ae
--- /dev/null
+++ b/libraries/httpClient/src/main/kotlin/de/itkl/httpClient/SmartCloudAuthPlugin.kt
@@ -0,0 +1,17 @@
+package de.itkl.httpClient
+
+import io.github.oshai.kotlinlogging.KotlinLogging
+import io.ktor.client.plugins.api.*
+import io.ktor.util.*
+import org.koin.core.component.KoinComponent
+
+private val Log = KotlinLogging.logger { }
+val smartCloudAuthPlugin = createClientPlugin("SmartCloudAuth") {
+    on(Send) { request ->
+        request.attributes.getOrNull(AttributeKey<String>("user"))?.let { username ->
+            Log.info { "Provide bearer token for $username" } 
+            TODO("retrieve user token ")
+        }
+        TODO()
+    }
+}
\ No newline at end of file
diff --git a/libraries/httpClient/src/main/kotlin/de/itkl/httpClient/clients/RestClient.kt b/libraries/httpClient/src/main/kotlin/de/itkl/httpClient/clients/RestClient.kt
new file mode 100644
index 0000000..fd2b480
--- /dev/null
+++ b/libraries/httpClient/src/main/kotlin/de/itkl/httpClient/clients/RestClient.kt
@@ -0,0 +1,9 @@
+package de.itkl.httpClient.clients
+
+import io.ktor.client.*
+import org.koin.core.component.KoinComponent
+import org.koin.core.component.inject
+
+abstract class RestClient : KoinComponent {
+    private val httpClient by inject<HttpClient>()
+}
\ No newline at end of file
diff --git a/libraries/httpClient/src/main/kotlin/de/itkl/httpClient/clients/XsClient.kt b/libraries/httpClient/src/main/kotlin/de/itkl/httpClient/clients/XsClient.kt
new file mode 100644
index 0000000..e2cd3d3
--- /dev/null
+++ b/libraries/httpClient/src/main/kotlin/de/itkl/httpClient/clients/XsClient.kt
@@ -0,0 +1,9 @@
+package de.itkl.httpClient.clients
+
+import io.ktor.client.*
+import org.koin.core.component.KoinComponent
+import org.koin.core.component.inject
+
+class XsClient : KoinComponent {
+    private val httpClient by inject<HttpClient>()
+}
\ No newline at end of file
diff --git a/libraries/httpClient/src/main/kotlin/de/itkl/httpClient/createHttpClient.kt b/libraries/httpClient/src/main/kotlin/de/itkl/httpClient/createHttpClient.kt
index 5756468..4196d85 100644
--- a/libraries/httpClient/src/main/kotlin/de/itkl/httpClient/createHttpClient.kt
+++ b/libraries/httpClient/src/main/kotlin/de/itkl/httpClient/createHttpClient.kt
@@ -10,5 +10,6 @@ fun createHttpClient(): HttpClient {
         install(ContentNegotiation) {
             json()
         }
+        install(smartCloudAuthPlugin)
     }
 }
\ No newline at end of file