diff --git a/src/Action/Search/SearchDataAction.php b/src/Action/Search/SearchDataAction.php
index 782d963a8b6d52c2fb5458c4b8bbc6851d8ad059..7520685cf14a49646f972147e26f0b57c29ad7a1 100644
--- a/src/Action/Search/SearchDataAction.php
+++ b/src/Action/Search/SearchDataAction.php
@@ -114,15 +114,6 @@ final class SearchDataAction
             )->withStatus(404);
         }
 
-        $queryParams = $request->getQueryParams();
-        if (!array_key_exists('c', $queryParams)) {
-            return $this->dispatchHttpError(
-                $response,
-                'Invalid request',
-                'Param c is required for this request'
-            )->withStatus(400);
-        }
-
         $queryParams = $request->getQueryParams();
         if (!array_key_exists('a', $queryParams)) {
             return $this->dispatchHttpError(
@@ -138,9 +129,11 @@ final class SearchDataAction
         $queryBuilder = $connection->createQueryBuilder();
 
         $anisQueryBuilder = $this->aqbf->create($queryBuilder, $dataset);
-        $anisQueryBuilder
-            ->select(explode(';', $queryParams['a']))
-            ->where(explode(';', $queryParams['c']));
+        $anisQueryBuilder->select(explode(';', $queryParams['a']));
+
+        if (array_key_exists('c', $queryParams)) {
+            $anisQueryBuilder->where(explode(';', $queryParams['c']));
+        }
 
         if (array_key_exists('o', $queryParams)) {
             $anisQueryBuilder->order(explode(';', $queryParams['o']));
diff --git a/src/Action/Search/SearchMetaAction.php b/src/Action/Search/SearchMetaAction.php
index d5b3a279329525daae45de2d4e41d1c9e4129157..165be4718ee72c32c71954c4425e2860ca4fee84 100644
--- a/src/Action/Search/SearchMetaAction.php
+++ b/src/Action/Search/SearchMetaAction.php
@@ -114,16 +114,7 @@ final class SearchMetaAction
                 'Dataset with id ' . $args['dname'] . ' is not found'
             )->withStatus(404);
         }
-
-        $queryParams = $request->getQueryParams();
-        if (!array_key_exists('c', $queryParams)) {
-            return $this->dispatchHttpError(
-                $response,
-                'Invalid request',
-                'Param c is required for this request'
-            )->withStatus(400);
-        }
-
+        
         $queryParams = $request->getQueryParams();
         if (!array_key_exists('a', $queryParams)) {
             return $this->dispatchHttpError(
@@ -149,9 +140,11 @@ final class SearchMetaAction
         $queryBuilder = $connection->createQueryBuilder();
 
         $anisQueryBuilder = $this->aqbf->create($queryBuilder, $dataset);
-        $anisQueryBuilder
-            ->count()
-            ->where(explode(';', $queryParams['c']));
+        $anisQueryBuilder->count();
+
+        if (array_key_exists('c', $queryParams)) {
+            $anisQueryBuilder->where(explode(';', $queryParams['c']));
+        }
 
         $this->logger->info('SQL: ' . $anisQueryBuilder->getSQL());