diff --git a/plugins/services_entity_abstract.inc b/plugins/services_entity_abstract.inc
index 76b2367..1f9153b 100644
--- a/plugins/services_entity_abstract.inc
+++ b/plugins/services_entity_abstract.inc
@@ -246,6 +246,18 @@ abstract class ServicesResourceControllerAbstract implements ServicesResourceCon
       'default value' => 'ASC',
       'source' => array('param' => 'direction'),
     );
+
+    /**
+     * Additional search options, such as sort operators.
+     */
+    $info['index']['args'][] = array(
+      'name' => 'options',
+      'optional' => TRUE,
+      'type' => 'array',
+      'description' => 'Additional query options.',
+      'default value' => array(),
+      'source' => array('param' => 'options'),
+    );
     return $info;
   }
 
diff --git a/plugins/services_entity_interface.inc b/plugins/services_entity_interface.inc
index 676c4ec..8657015 100644
--- a/plugins/services_entity_interface.inc
+++ b/plugins/services_entity_interface.inc
@@ -94,14 +94,22 @@ interface ServicesResourceControllerInterface {
    *
    * @param string $entity_type
    *   The type of the resource that should be deleted.
-   * @param array $filters
-   *   field comparison operators to filter the results.
+   * @param string $fields
+   *   The fields to be returned.
+   * @param array $parameters
+   *   Property and field parameters comparison operators to filter the results.
    * @param int $page
-   *   The page of resources to be returned
-   * @param int $limit
+   *   The page of resources to be returned.
+   * @param int $pagesize
    *   The number of items on that pages to be returned.
+   * @param string $sort
+   *   What field or property to sort on.
+   * @param string $direction
+   *   The sort direction
+   * @param array $options
+   *   Any additioinal options for this search.
    */
-  public function index($entity_type, $fields, $parameters, $page, $pagesize, $sort, $direction);
+  public function index($entity_type, $fields, $parameters, $page, $pagesize, $sort, $direction, $options);
 
   /**
    * Get the value of a single field.
diff --git a/plugins/services_entity_resource.inc b/plugins/services_entity_resource.inc
index 4f63271..5e0704f 100644
--- a/plugins/services_entity_resource.inc
+++ b/plugins/services_entity_resource.inc
@@ -109,7 +109,7 @@ class ServicesEntityResourceController extends ServicesResourceControllerAbstrac
   /**
    * Implements ServicesResourceControllerInterface::index().
    */
-  public function index($entity_type, $fields, $parameters, $page, $pagesize, $sort, $direction) {
+  public function index($entity_type, $fields, $parameters, $page, $pagesize, $sort, $direction, $options = array()) {
     // Make sure the pagesize is not too large.
     $max_pagesize = variable_get('services_entity_max_pagesize', 100);
     $pagesize = ($max_pagesize < $pagesize) ? $max_pagesize : $pagesize;
@@ -122,7 +122,12 @@ class ServicesEntityResourceController extends ServicesResourceControllerAbstrac
 
     if (!empty($parameters)) {
       foreach ($parameters as $field => $value) {
-        $this->propertyQueryOperation($entity_type, $query, 'Condition', $field, $value);
+        $operator = (
+          !empty($options['parameters_op'][$field]) ?
+          $this->filterOperator($options['parameters_op'][$field], $value) :
+          $this->defaultOperator($value)
+        );
+        $this->propertyQueryOperation($entity_type, $query, 'Condition', $field, $value, $operator);
       }
     }
     if ($sort != '') {
@@ -237,7 +242,7 @@ class ServicesEntityResourceController extends ServicesResourceControllerAbstrac
    * @param string|array $value
    *   The value for the function.
    */
-  protected function propertyQueryOperation($entity_type, EntityFieldQuery $query, $operation, $property, $value) {
+  protected function propertyQueryOperation($entity_type, EntityFieldQuery $query, $operation, $property, $value, $operator = '=') {
     // First pass: check the entity's table schema.
     // Get the database schema for the entity's table.
     $entity_info = entity_get_info($entity_type);
@@ -246,7 +251,7 @@ class ServicesEntityResourceController extends ServicesResourceControllerAbstrac
       // If the property is defined in the schema, use the schema property.
       // The EFQ method is either 'propertyCondition' or 'OrderByCondition'.
       $operation = 'property' . $operation;
-      $query->$operation($property, $value);
+      $query->$operation($property, $value, $operator);
       return;
     }
 
@@ -263,14 +268,14 @@ class ServicesEntityResourceController extends ServicesResourceControllerAbstrac
         // Specific column filters are given, so add a query condition for each
         // one of them.
         foreach ($value as $column => $val) {
-          $query->$operation($field_info, $column, $val);
+          $query->$operation($field_info, $column, $val, $operator);
         }
       }
       else {
         // Just pick the first field column for the operation.
         $columns = array_keys($field_info['columns']);
         $column = $columns[0];
-        $query->$operation($field_info, $column, $value);
+        $query->$operation($field_info, $column, $value, $operator);
       }
 
       return;
@@ -315,4 +320,42 @@ class ServicesEntityResourceController extends ServicesResourceControllerAbstrac
       }
     }
   }
+
+  /**
+   * Filter a query operator.
+   *
+   * @param string $operator
+   *   The submitted operator.
+   * @param mixed $value
+   *   The value to operate on.
+   *
+   * @return string
+   *   The filtered operator.
+   */
+  protected function filterOperator($operator, $value) {
+    $valid_operators = array('=', '<>', '>', '>=', '<', '<=',
+                             'STARTS_WITH', 'CONTAINS', 'IN', 'NOT IN',
+                             'BETWEEN', 'LIKE');
+    if (in_array(strtoupper($operator), $valid_operators)) {
+      return $operator;
+    }
+    return $this->defaultOperator($value);
+  }
+
+  /**
+   * Get the default operator for this value type.
+   *
+   * @param mixed $value
+   *   The value to operate on.
+   *
+   * @return string
+   *   The default operator.
+   */
+  protected function defaultOperator($value) {
+    if (is_array($value)) {
+      return 'IN';
+    }
+    return '=';
+  }
+
 }
diff --git a/plugins/services_entity_resource_clean.inc b/plugins/services_entity_resource_clean.inc
index 712ae71..8aefa5b 100644
--- a/plugins/services_entity_resource_clean.inc
+++ b/plugins/services_entity_resource_clean.inc
@@ -106,13 +106,13 @@ class ServicesEntityResourceControllerClean extends ServicesEntityResourceContro
     return $this->get_data($wrapper, '*');
   }
 
-  public function index($entity_type, $fields, $parameters, $page, $pagesize, $sort, $direction) {
+  public function index($entity_type, $fields, $parameters, $page, $pagesize, $sort, $direction, $options = array()) {
     $property_info = entity_get_all_property_info($entity_type);
     $parameters = $this->transform_values($entity_type, $property_info, $parameters);
     $sort = (isset($property_info['field_' . $sort]))?'field_' . $sort:$sort;
 
     // Call the parent method, which takes care of access control.
-    $entities = parent::index($entity_type, '*', $parameters, $page, $pagesize, $sort, $direction);
+    $entities = parent::index($entity_type, '*', $parameters, $page, $pagesize, $sort, $direction, $options);
     foreach($entities as $entity) {
       $return[] = $this->get_data(entity_metadata_wrapper($entity_type, $entity), $fields);
     }