diff --git a/Controller/ApiTraitController.php b/Controller/ApiTraitController.php
new file mode 100644
index 0000000..ed01d89
--- /dev/null
+++ b/Controller/ApiTraitController.php
@@ -0,0 +1,572 @@
+<?php
+/**
+ * Jingga
+ *
+ * PHP Version 8.1
+ *
+ * @package   Modules\Attribute
+ * @copyright Dennis Eichhorn
+ * @license   OMS License 2.0
+ * @version   1.0.0
+ * @link      https://jingga.app
+ */
+declare(strict_types=1);
+
+namespace Modules\Attribute\Controller;
+
+use Modules\Attribute\Models\Attribute;
+use Modules\Attribute\Models\AttributeType;
+use Modules\Attribute\Models\AttributeValue;
+use Modules\Attribute\Models\NullAttribute;
+use Modules\Attribute\Models\NullAttributeType;
+use Modules\Attribute\Models\NullAttributeValue;
+use phpOMS\Localization\BaseStringL11n;
+use phpOMS\Localization\ISO639x1Enum;
+use phpOMS\Message\RequestAbstract;
+
+trait ApiTraitController
+{
+    /**
+     * Method to create item attribute from request.
+     *
+     * @param RequestAbstract $request Request
+     *
+     * @return Attribute
+     *
+     * @since 1.0.0
+     */
+    private function createAttributeFromRequest(RequestAbstract $request) : Attribute
+    {
+        $attribute       = new Attribute();
+        $attribute->ref  = (int) $request->getData('ref');
+        $attribute->type = new NullAttributeType((int) $request->getData('type'));
+
+        if ($request->hasData('value')) {
+            $attribute->value = new NullAttributeValue((int) $request->getData('value'));
+        } else {
+            $newRequest = clone $request;
+            $newRequest->setData('value', $request->getData('custom'), true);
+
+            $value = $this->createAttributeValueFromRequest($newRequest, $attribute->type);
+
+            $attribute->value = $value;
+        }
+
+        return $attribute;
+    }
+
+    /**
+     * Validate attribute create request
+     *
+     * @param RequestAbstract $request Request
+     *
+     * @return array<string, bool>
+     *
+     * @since 1.0.0
+     */
+    private function validateAttributeCreate(RequestAbstract $request) : array
+    {
+        $val = [];
+        if (($val['type'] = !$request->hasData('type'))
+            || ($val['value'] = (!$request->hasData('value') && !$request->hasData('custom')))
+        ) {
+            return $val;
+        }
+
+        return [];
+    }
+
+    /**
+     * Method to create attribute l11n from request.
+     *
+     * @param RequestAbstract $request Request
+     *
+     * @return BaseStringL11n
+     *
+     * @since 1.0.0
+     */
+    private function createAttributeTypeL11nFromRequest(RequestAbstract $request) : BaseStringL11n
+    {
+        $attrL11n      = new BaseStringL11n();
+        $attrL11n->ref = $request->getDataInt('type') ?? 0;
+        $attrL11n->setLanguage(
+            $request->getDataString('language') ?? $request->header->l11n->language
+        );
+        $attrL11n->content = $request->getDataString('title') ?? '';
+
+        return $attrL11n;
+    }
+
+    /**
+     * Validate attribute l11n create request
+     *
+     * @param RequestAbstract $request Request
+     *
+     * @return array<string, bool>
+     *
+     * @since 1.0.0
+     */
+    private function validateAttributeTypeL11nCreate(RequestAbstract $request) : array
+    {
+        $val = [];
+        if (($val['title'] = !$request->hasData('title'))
+            || ($val['type'] = !$request->hasData('type'))
+        ) {
+            return $val;
+        }
+
+        return [];
+    }
+
+    /**
+     * Method to create attribute from request.
+     *
+     * @param RequestAbstract $request Request
+     *
+     * @return AttributeType
+     *
+     * @since 1.0.0
+     */
+    private function createAttributeTypeFromRequest(RequestAbstract $request) : AttributeType
+    {
+        $attrType                    = new AttributeType($request->getDataString('name') ?? '');
+        $attrType->datatype          = $request->getDataInt('datatype') ?? 0;
+        $attrType->custom            = $request->getDataBool('custom') ?? false;
+        $attrType->isRequired        = $request->getDataBool('is_required') ?? false;
+        $attrType->validationPattern = $request->getDataString('validation_pattern') ?? '';
+        $attrType->setL11n($request->getDataString('title') ?? '', $request->getDataString('language') ?? ISO639x1Enum::_EN);
+        $attrType->setFields($request->getDataInt('fields') ?? 0);
+
+        return $attrType;
+    }
+
+    /**
+     * Validate attribute create request
+     *
+     * @param RequestAbstract $request Request
+     *
+     * @return array<string, bool>
+     *
+     * @since 1.0.0
+     */
+    private function validateAttributeTypeCreate(RequestAbstract $request) : array
+    {
+        $val = [];
+        if (($val['title'] = !$request->hasData('title'))
+            || ($val['name'] = !$request->hasData('name'))
+        ) {
+            return $val;
+        }
+
+        return [];
+    }
+
+    /**
+     * Method to create attribute value from request.
+     *
+     * @param RequestAbstract $request Request
+     *
+     * @return AttributeValue
+     *
+     * @since 1.0.0
+     */
+    private function createAttributeValueFromRequest(RequestAbstract $request, AttributeType $type) : AttributeValue
+    {
+        $attrValue            = new AttributeValue();
+        $attrValue->isDefault = $request->getDataBool('default') ?? false;
+        $attrValue->setValue($request->getDataString('value'), $type->datatype);
+
+        if ($request->hasData('title')) {
+            $attrValue->setL11n($request->getDataString('title') ?? '', $request->getDataString('language') ?? ISO639x1Enum::_EN);
+        }
+
+        return $attrValue;
+    }
+
+    /**
+     * Validate attribute value create request
+     *
+     * @param RequestAbstract $request Request
+     *
+     * @return array<string, bool>
+     *
+     * @since 1.0.0
+     */
+    private function validateAttributeValueCreate(RequestAbstract $request) : array
+    {
+        $val = [];
+        if (($val['type'] = !$request->hasData('type'))
+            || ($val['value'] = !$request->hasData('value'))
+        ) {
+            return $val;
+        }
+
+        return [];
+    }
+
+    /**
+     * Method to create attribute l11n from request.
+     *
+     * @param RequestAbstract $request Request
+     *
+     * @return BaseStringL11n
+     *
+     * @since 1.0.0
+     */
+    private function createAttributeValueL11nFromRequest(RequestAbstract $request) : BaseStringL11n
+    {
+        $attrL11n      = new BaseStringL11n();
+        $attrL11n->ref = $request->getDataInt('value') ?? 0;
+        $attrL11n->setLanguage(
+            $request->getDataString('language') ?? $request->header->l11n->language
+        );
+        $attrL11n->content = $request->getDataString('title') ?? '';
+
+        return $attrL11n;
+    }
+
+    /**
+     * Validate attribute l11n create request
+     *
+     * @param RequestAbstract $request Request
+     *
+     * @return array<string, bool>
+     *
+     * @since 1.0.0
+     */
+    private function validateAttributeValueL11nCreate(RequestAbstract $request) : array
+    {
+        $val = [];
+        if (($val['title'] = !$request->hasData('title'))
+            || ($val['value'] = !$request->hasData('value'))
+        ) {
+            return $val;
+        }
+
+        return [];
+    }
+
+    /**
+     * Method to update Attribute from request.
+     *
+     * @param RequestAbstract  $request Request
+     * @param Attribute     $new     Model to modify
+     *
+     * @return Attribute
+     *
+     * @since 1.0.0
+     */
+    public function updateAttributeFromRequest(RequestAbstract $request, Attribute $new) : Attribute
+    {
+        if ($request->hasData('value')) {
+            $new->value = $request->hasData('value') ? new NullAttributeValue((int) $request->getData('value')) : $new->value;
+        } else {
+            // @todo: fix by only accepting the value id to be used
+            // this is a workaround for now because the front end doesn't allow to dynamically show default values.
+            $value = $new->type->getDefaultByValue($request->getData('value'));
+
+            // Couldn't find matching default value
+            if ($value->id === 0) {
+                return new NullAttribute();
+            }
+
+            $new->value = $value;
+        }
+
+        return $new;
+    }
+
+    /**
+     * Validate Attribute update request
+     *
+     * @param RequestAbstract $request Request
+     *
+     * @return array<string, bool>
+     *
+     * @since 1.0.0
+     */
+    private function validateAttributeUpdate(RequestAbstract $request) : array
+    {
+        $val = [];
+        if (($val['id'] = !$request->hasData('id'))
+            || ($val['value'] = (!$request->hasData('value') && !$request->hasData('custom')))
+        ) {
+            return $val;
+        }
+
+        return [];
+    }
+
+    /**
+     * Validate Attribute delete request
+     *
+     * @param RequestAbstract $request Request
+     *
+     * @return array<string, bool>
+     *
+     * @since 1.0.0
+     */
+    private function validateAttributeDelete(RequestAbstract $request) : array
+    {
+        $val = [];
+        if (($val['id'] = !$request->hasData('id'))) {
+            return $val;
+        }
+
+        return [];
+    }
+
+    /**
+     * Method to update AttributeTypeL11n from request.
+     *
+     * @param RequestAbstract  $request Request
+     * @param BaseStringL11n     $new     Model to modify
+     *
+     * @return BaseStringL11n
+     *
+     * @todo: consider to move all these FromRequest functions to the attribute module since they are the same in every module!
+     *
+     * @since 1.0.0
+     */
+    public function updateAttributeTypeL11nFromRequest(RequestAbstract $request, BaseStringL11n $new) : BaseStringL11n
+    {
+        $new->setLanguage(
+            $request->getDataString('language') ?? $new->language
+        );
+        $new->content = $request->getDataString('title') ?? $new->content;
+
+        return $new;
+    }
+
+    /**
+     * Validate AttributeTypeL11n update request
+     *
+     * @param RequestAbstract $request Request
+     *
+     * @return array<string, bool>
+     *
+     * @todo: implement
+     *
+     * @since 1.0.0
+     */
+    private function validateAttributeTypeL11nUpdate(RequestAbstract $request) : array
+    {
+        $val = [];
+        if (($val['id'] = !$request->hasData('id'))) {
+            return $val;
+        }
+
+        return [];
+    }
+
+    /**
+     * Validate AttributeTypeL11n delete request
+     *
+     * @param RequestAbstract $request Request
+     *
+     * @return array<string, bool>
+     *
+     * @todo: implement
+     *
+     * @since 1.0.0
+     */
+    private function validateAttributeTypeL11nDelete(RequestAbstract $request) : array
+    {
+        $val = [];
+        if (($val['id'] = !$request->hasData('id'))) {
+            return $val;
+        }
+
+        return [];
+    }
+
+    /**
+     * Method to update AttributeType from request.
+     *
+     * @param RequestAbstract  $request Request
+     * @param AttributeType     $new     Model to modify
+     *
+     * @return AttributeType
+     *
+     * @todo: implement
+     *
+     * @since 1.0.0
+     */
+    public function updateAttributeTypeFromRequest(RequestAbstract $request, AttributeType $new) : AttributeType
+    {
+        $new->datatype          = $request->getDataInt('datatype') ?? $new->datatype;
+        $new->custom            = $request->getDataBool('custom') ?? $new->custom;
+        $new->isRequired        = $request->getDataBool('is_required') ?? $new->isRequired;
+        $new->validationPattern = $request->getDataString('validation_pattern') ?? $new->validationPattern;
+
+        return $new;
+    }
+
+    /**
+     * Validate AttributeType update request
+     *
+     * @param RequestAbstract $request Request
+     *
+     * @return array<string, bool>
+     *
+     * @todo: implement
+     *
+     * @since 1.0.0
+     */
+    private function validateAttributeTypeUpdate(RequestAbstract $request) : array
+    {
+        $val = [];
+        if (($val['id'] = !$request->hasData('id'))) {
+            return $val;
+        }
+
+        return [];
+    }
+
+    /**
+     * Validate AttributeType delete request
+     *
+     * @param RequestAbstract $request Request
+     *
+     * @return array<string, bool>
+     *
+     * @since 1.0.0
+     */
+    private function validateAttributeTypeDelete(RequestAbstract $request) : array
+    {
+        $val = [];
+        if (($val['id'] = !$request->hasData('id'))) {
+            return $val;
+        }
+
+        return [];
+    }
+
+    /**
+     * Method to update AttributeValue from request.
+     *
+     * @param RequestAbstract  $request Request
+     * @param AttributeValue     $new     Model to modify
+     *
+     * @return AttributeValue
+     *
+     * @todo: implement
+     *
+     * @since 1.0.0
+     */
+    public function updateAttributeValueFromRequest(RequestAbstract $request, AttributeValue $new, Attribute $attr) : AttributeValue
+    {
+        $new->isDefault = $request->getDataBool('default') ?? $new->isDefault;
+        $new->setValue($request->getDataString('value'), $attr->type->datatype);
+
+        return $new;
+    }
+
+    /**
+     * Validate AttributeValue update request
+     *
+     * @param RequestAbstract $request Request
+     *
+     * @return array<string, bool>
+     *
+     * @todo: implement
+     *
+     * @since 1.0.0
+     */
+    private function validateAttributeValueUpdate(RequestAbstract $request) : array
+    {
+        $val = [];
+        if (($val['id'] = !$request->hasData('id'))
+            || ($val['attribute'] = !$request->hasData('attribute'))
+        ) {
+            return $val;
+        }
+
+        return [];
+    }
+
+    /**
+     * Validate AttributeValue delete request
+     *
+     * @param RequestAbstract $request Request
+     *
+     * @return array<string, bool>
+     *
+     * @todo: implement
+     *
+     * @since 1.0.0
+     */
+    private function validateAttributeValueDelete(RequestAbstract $request) : array
+    {
+        $val = [];
+        if (($val['id'] = !$request->hasData('id'))) {
+            return $val;
+        }
+
+        return [];
+    }
+
+    /**
+     * Method to update AttributeValueL11n from request.
+     *
+     * @param RequestAbstract  $request Request
+     * @param BaseStringL11n     $new     Model to modify
+     *
+     * @return BaseStringL11n
+     *
+     * @todo: implement
+     *
+     * @since 1.0.0
+     */
+    public function updateAttributeValueL11nFromRequest(RequestAbstract $request, BaseStringL11n $new) : BaseStringL11n
+    {
+        $new->setLanguage(
+            $request->getDataString('language') ?? $new->language
+        );
+        $new->content = $request->getDataString('title') ?? $new->content;
+
+        return $new;
+    }
+
+    /**
+     * Validate AttributeValueL11n update request
+     *
+     * @param RequestAbstract $request Request
+     *
+     * @return array<string, bool>
+     *
+     * @todo: implement
+     *
+     * @since 1.0.0
+     */
+    private function validateAttributeValueL11nUpdate(RequestAbstract $request) : array
+    {
+        $val = [];
+        if (($val['id'] = !$request->hasData('id'))) {
+            return $val;
+        }
+
+        return [];
+    }
+
+    /**
+     * Validate AttributeValueL11n delete request
+     *
+     * @param RequestAbstract $request Request
+     *
+     * @return array<string, bool>
+     *
+     * @todo: implement
+     *
+     * @since 1.0.0
+     */
+    private function validateAttributeValueL11nDelete(RequestAbstract $request) : array
+    {
+        $val = [];
+        if (($val['id'] = !$request->hasData('id'))) {
+            return $val;
+        }
+
+        return [];
+    }
+}