diff --git a/graphenej/src/main/java/cy/agorise/graphenej/api/ApiCallback.java b/graphenej/src/main/java/cy/agorise/graphenej/api/ApiCallback.java
index dc04acf..188711a 100644
--- a/graphenej/src/main/java/cy/agorise/graphenej/api/ApiCallback.java
+++ b/graphenej/src/main/java/cy/agorise/graphenej/api/ApiCallback.java
@@ -1,5 +1,7 @@
 package cy.agorise.graphenej.api;
 
+import javax.annotation.Nullable;
+
 import cy.agorise.graphenej.models.JsonRpcResponse;
 import okhttp3.Response;
 
@@ -19,8 +21,8 @@ public interface ApiCallback {
     /**
      * Method called whenever there was an error and the response could not be delivered.
      *
-     * @param t         Error Trowable, potentially with some details about the problem.
+     * @param t         Error Throwable, potentially with some details about the problem.
      * @param response  Node response, if any
      */
-    void onFailure(Throwable t, Response response);
+    void onFailure(Throwable t, @Nullable Response response);
 }
diff --git a/graphenej/src/main/java/cy/agorise/graphenej/api/android/NetworkService.java b/graphenej/src/main/java/cy/agorise/graphenej/api/android/NetworkService.java
index 19172c9..6fcc810 100644
--- a/graphenej/src/main/java/cy/agorise/graphenej/api/android/NetworkService.java
+++ b/graphenej/src/main/java/cy/agorise/graphenej/api/android/NetworkService.java
@@ -565,7 +565,10 @@ public class NetworkService {
             // Executing callback, if present with the parsed response
             if(mCallbackMap.containsKey(response.id)){
                 ApiCallback callback = mCallbackMap.get(response.id);
-                callback.onResponse(parsedResponse, text);
+                if(response.error == null)
+                    callback.onResponse(parsedResponse, text);
+                else
+                    callback.onFailure(new Exception("Exception while trying to parse node response. Message: " + response.error.message), null);
                 mCallbackMap.remove(response.id);
             }