diff --git a/code/Api/Contact/MySalesforceContactConfigApi.php b/code/Api/Contact/MySalesforceContactConfigApi.php
new file mode 100644
index 0000000..17ae46c
--- /dev/null
+++ b/code/Api/Contact/MySalesforceContactConfigApi.php
@@ -0,0 +1,144 @@
+<?php
+/**
+ * configuration for adding / updating contact records
+ */
+class MySalesforceContactConfigApi extends Object
+{
+    /**
+     * @var array
+     */
+    private static $site_wide_fields_to_send_on_creation = [];
+
+    /**
+     * @var array
+     */
+    private static $site_wide_fields_to_send_on_update = [];
+
+    /**
+     * @var array
+     */
+    private static $site_wide_filter_values = [];
+
+    /**
+     * @var array
+     */
+    private static $run_time_fields_to_send_on_creation = [];
+
+    /**
+     * @var array
+     */
+    private static $run_time_fields_to_send_on_update = [];
+
+    /**
+     * @var array
+     */
+    private static $run_time_fields_for_filter = [];
+
+    /**
+     * @param  array|DataList|string $mixed fields to send for creations
+     */
+    public static function add_fields_to_send_on_creation($mixed)
+    {
+        $array = self::mixed_to_array($mixed);
+
+        self::$run_time_fields_to_send_on_creation += $array;
+    }
+
+    /**
+     * @param  array|DataList|string $mixed fields to send for updates
+     *
+     * @return array
+     */
+    public static function add_fields_to_send_on_update($mixed)
+    {
+        $array = self::mixed_to_array($mixed);
+
+        self::$run_time_fields_to_send_on_update += $array;
+    }
+
+    /**
+     * @param  array|DataList|string $mixed fields to send as filters
+     *
+     * @return array
+     */
+    public static function add_fields_to_use_for_filter($mixed)
+    {
+        $array = self::mixed_to_array($mixed);
+
+        self::$run_time_fields_for_filter += $array;
+    }
+
+    /**
+     * @param  array|DataList|null $mixed fields to send
+     *
+     * @return array
+     */
+    public static function get_fields_to_send_on_creation($mixed = null)
+    {
+        $array = self::mixed_to_array($mixed);
+
+        return array_merge(
+            Config::inst()->get('MySalesforceContactConfigApi', 'site_wide_fields_to_send_on_creation'),
+            $array,
+            self::$run_time_fields_to_send_on_creation
+        );
+    }
+
+    /**
+     * @param  array|DataList|null $mixed fields to send
+     *
+     * @return array
+     */
+    public static function get_fields_to_send_on_update($mixed = null)
+    {
+        $array = self::mixed_to_array($mixed);
+
+        return array_merge(
+            Config::inst()->get('MySalesforceContactConfigApi', 'site_wide_fields_to_send_on_update'),
+            $array,
+            self::$run_time_fields_to_send_on_update
+        );
+    }
+
+    /**
+     * @param  array|DataList|null $mixed fields to send
+     *
+     * @return array|DataList|null
+     */
+    public static function get_fields_for_filter($mixed = null)
+    {
+        $array = self::mixed_to_array($mixed);
+
+        return array_merge(
+            Config::inst()->get('MySalesforceContactConfigApi', 'site_wide_filter_values'),
+            $array,
+            self::$run_time_fields_for_filter
+        );
+    }
+
+    /**
+     * @param DataList|array|string|null $mixed
+     *
+     * @return array
+     */
+    protected static function mixed_to_array($mixed = null)
+    {
+        if ($mixed === null) {
+            $array = [];
+        } elseif ($mixed instanceof SS_List) {
+            $array = [];
+            foreach ($mixed as $object) {
+                $array[trim($object->Key)] = $object->BetterValue();
+            }
+        } elseif (is_string($mixed)) {
+            $array = [$mixed];
+        } elseif (is_array($mixed)) {
+            $array = $mixed;
+        } else {
+            $array = [];
+            user_error('Variable ' . print_r($mixed, 1) . ' should be an array. Currently, it is a ' . gettype($mixed));
+        }
+
+        return $array;
+    }
+}