diff --git a/gradle.properties b/gradle.properties
index 8336e5c..8effd8b 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,4 +1,5 @@
 systemProp.gradle.user.home=/Users/kinch/.gradle/
 org.gradle.parallel=true
 org.gradle.caching=true
-version=1.0
\ No newline at end of file
+version=1.0
+group=de.itkl
\ No newline at end of file
diff --git a/libraries/clients/build.gradle.kts b/libraries/clients/build.gradle.kts
new file mode 100644
index 0000000..e69de29
diff --git a/libraries/clients/src/main/kotlin/de/itkl/clients/MsOcr.kt b/libraries/clients/src/main/kotlin/de/itkl/clients/MsOcr.kt
new file mode 100644
index 0000000..f2a5ac7
--- /dev/null
+++ b/libraries/clients/src/main/kotlin/de/itkl/clients/MsOcr.kt
@@ -0,0 +1,6 @@
+package de.itkl.clients
+
+class MsOcr {
+
+    suspend fun ocr() {}
+}
\ No newline at end of file
diff --git a/libraries/core-api/build.gradle.kts b/libraries/core-api/build.gradle.kts
new file mode 100644
index 0000000..7bf4c6c
--- /dev/null
+++ b/libraries/core-api/build.gradle.kts
@@ -0,0 +1,4 @@
+dependencies {
+    // used for contentType
+    api("io.ktor:ktor-http-jvm:2.3.7")
+}
\ No newline at end of file
diff --git a/libraries/fileprocessing/src/main/kotlin/de/itkl/fileprocessing/FileProcessor.kt b/libraries/core-api/src/main/kotlin/de/itkl/core_api/interfaces/FileProcessor.kt
similarity index 83%
rename from libraries/fileprocessing/src/main/kotlin/de/itkl/fileprocessing/FileProcessor.kt
rename to libraries/core-api/src/main/kotlin/de/itkl/core_api/interfaces/FileProcessor.kt
index 3f156a0..c5f907d 100644
--- a/libraries/fileprocessing/src/main/kotlin/de/itkl/fileprocessing/FileProcessor.kt
+++ b/libraries/core-api/src/main/kotlin/de/itkl/core_api/interfaces/FileProcessor.kt
@@ -1,4 +1,4 @@
-package de.itkl.fileprocessing
+package de.itkl.core_api.interfaces
 
 import java.io.File
 import java.io.InputStream
diff --git a/libraries/io/src/main/kotlin/de/itkl/io/interfaces/Resource.kt b/libraries/core-api/src/main/kotlin/de/itkl/core_api/interfaces/Resource.kt
similarity index 84%
rename from libraries/io/src/main/kotlin/de/itkl/io/interfaces/Resource.kt
rename to libraries/core-api/src/main/kotlin/de/itkl/core_api/interfaces/Resource.kt
index 7aee589..f6c437f 100644
--- a/libraries/io/src/main/kotlin/de/itkl/io/interfaces/Resource.kt
+++ b/libraries/core-api/src/main/kotlin/de/itkl/core_api/interfaces/Resource.kt
@@ -1,11 +1,9 @@
-package de.itkl.io.interfaces
+package de.itkl.core_api.interfaces
 
 import io.ktor.http.*
 import org.koin.core.component.KoinComponent
 import org.koin.core.component.get
-import org.koin.core.qualifier.named
 import java.io.InputStream
-import java.io.InputStreamReader
 
 abstract class Resource : KoinComponent {
     abstract val filename: String
diff --git a/libraries/io/src/main/kotlin/de/itkl/io/interfaces/ResourceReadDecorator.kt b/libraries/core-api/src/main/kotlin/de/itkl/core_api/interfaces/ResourceReadDecorator.kt
similarity index 89%
rename from libraries/io/src/main/kotlin/de/itkl/io/interfaces/ResourceReadDecorator.kt
rename to libraries/core-api/src/main/kotlin/de/itkl/core_api/interfaces/ResourceReadDecorator.kt
index 87ef9c7..d403a9e 100644
--- a/libraries/io/src/main/kotlin/de/itkl/io/interfaces/ResourceReadDecorator.kt
+++ b/libraries/core-api/src/main/kotlin/de/itkl/core_api/interfaces/ResourceReadDecorator.kt
@@ -1,4 +1,4 @@
-package de.itkl.io.interfaces
+package de.itkl.core_api.interfaces
 
 import java.io.InputStream
 
diff --git a/libraries/fileprocessing/build.gradle.kts b/libraries/fileprocessing/build.gradle.kts
index da9f7d0..b46b61e 100644
--- a/libraries/fileprocessing/build.gradle.kts
+++ b/libraries/fileprocessing/build.gradle.kts
@@ -1,3 +1,4 @@
 dependencies {
     implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.7.3")
+    api(project(":libraries:core-api"))
 }
diff --git a/libraries/fileprocessing/src/main/kotlin/de/itkl/fileprocessing/ProcessingPipeline.kt b/libraries/fileprocessing/src/main/kotlin/de/itkl/fileprocessing/ProcessingPipeline.kt
index 9643c63..1a088e9 100644
--- a/libraries/fileprocessing/src/main/kotlin/de/itkl/fileprocessing/ProcessingPipeline.kt
+++ b/libraries/fileprocessing/src/main/kotlin/de/itkl/fileprocessing/ProcessingPipeline.kt
@@ -1,7 +1,7 @@
 package de.itkl.fileprocessing
 
+import de.itkl.core_api.interfaces.FileProcessor
 import io.github.oshai.kotlinlogging.KotlinLogging
-import org.koin.core.annotation.KoinReflectAPI
 import org.koin.core.component.KoinComponent
 import org.koin.core.component.inject
 import java.io.File
diff --git a/libraries/io/build.gradle.kts b/libraries/io/build.gradle.kts
index 25c5111..f65fc07 100644
--- a/libraries/io/build.gradle.kts
+++ b/libraries/io/build.gradle.kts
@@ -1,3 +1,3 @@
 dependencies {
-    implementation("io.ktor:ktor-http-jvm:2.3.7")
+    api(project(":libraries:core-api"))
 }
\ No newline at end of file
diff --git a/libraries/io/src/main/kotlin/de/itkl/io/implementation/FileSystemResource.kt b/libraries/io/src/main/kotlin/de/itkl/io/implementation/FileSystemResource.kt
index 969e76d..519ea73 100644
--- a/libraries/io/src/main/kotlin/de/itkl/io/implementation/FileSystemResource.kt
+++ b/libraries/io/src/main/kotlin/de/itkl/io/implementation/FileSystemResource.kt
@@ -1,6 +1,6 @@
 package de.itkl.io.implementation
 
-import de.itkl.io.interfaces.Resource
+import de.itkl.core_api.interfaces.Resource
 import io.ktor.http.*
 import java.io.File
 import java.io.InputStream
diff --git a/libraries/io/src/main/kotlin/de/itkl/io/ioModule.kt b/libraries/io/src/main/kotlin/de/itkl/io/ioModule.kt
index 0619bc0..d242b35 100644
--- a/libraries/io/src/main/kotlin/de/itkl/io/ioModule.kt
+++ b/libraries/io/src/main/kotlin/de/itkl/io/ioModule.kt
@@ -1,7 +1,7 @@
 package de.itkl.io
 
-import de.itkl.io.interfaces.NoopResourceReadDecorator
-import de.itkl.io.interfaces.ResourceReadDecorator
+import de.itkl.core_api.interfaces.NoopResourceReadDecorator
+import de.itkl.core_api.interfaces.ResourceReadDecorator
 import org.koin.dsl.module
 
 val ioModule = module {