diff --git a/src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/network/parser/ParameterParseException.java b/src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/network/parser/ParameterParseException.java
index af727bd..97628a6 100644
--- a/src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/network/parser/ParameterParseException.java
+++ b/src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/network/parser/ParameterParseException.java
@@ -2,13 +2,26 @@ package ch.unibas.dmi.dbis.cs108.casono.server.network.parser;
 
 /** Exception thrown when a parameter value cannot be converted to the requested type. */
 public class ParameterParseException extends RuntimeException {
+    private final String parameterKey;
+
     /**
      * Creates a new parse exception with a root cause.
      *
      * @param message human-readable description of the parsing failure
+     * @param parameterKey key for whose value the error occured
      * @param cause original exception thrown during parsing
      */
-    public ParameterParseException(String message, Throwable cause) {
+    public ParameterParseException(String message, String parameterKey, Throwable cause) {
         super(message, cause);
+        this.parameterKey = parameterKey;
+    }
+
+    /**
+     * Returns the missing parameter key.
+     *
+     * @return key for whose value the error occured
+     */
+    public String getParameterKey() {
+        return parameterKey;
     }
 }
diff --git a/src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/network/parser/RequestParameterAccessor.java b/src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/network/parser/RequestParameterAccessor.java
index cb1998d..79ceac6 100644
--- a/src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/network/parser/RequestParameterAccessor.java
+++ b/src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/network/parser/RequestParameterAccessor.java
@@ -56,7 +56,7 @@ public class RequestParameterAccessor {
         try {
             return parser.parse(value);
         } catch (Exception e) {
-            throw new ParameterParseException("Error while parsing with specified parser", e);
+            throw new ParameterParseException("Error while parsing '" + key + "' with specified parser", key, e);
         }
     }
 
@@ -94,7 +94,7 @@ public class RequestParameterAccessor {
         try {
             return parser.parse(value);
         } catch (Exception e) {
-            throw new ParameterParseException("Error while parsing with specified parser", e);
+            throw new ParameterParseException("Error while parsing '" + key + "' with specified parser", key, e);
         }
     }