diff --git a/lib/Database.php b/lib/Database.php
index f8ef9da..e738dfd 100644
--- a/lib/Database.php
+++ b/lib/Database.php
@@ -948,7 +948,7 @@ class Database {
         return $this->db->prepare($q->getQuery(), $q->getTypes())->run($q->getValues())->getValue();
     }
 
-    public function articleMark(string $user, array $data, Context $context = null): bool {
+    public function articleMark(string $user, array $data, Context $context = null): int {
         if (!Arsse::$user->authorize($user, __FUNCTION__)) {
             throw new User\ExceptionAuthz("notAuthorized", ["action" => __FUNCTION__, "user" => $user]);
         }
@@ -1008,7 +1008,7 @@ class Database {
         }
         // commit the transaction
         $tr->commit();
-        return (bool) $out;
+        return $out;
     }
 
     public function articleStarred(string $user): array {
@@ -1253,7 +1253,7 @@ class Database {
         }
     }
 
-    public function labelArticlesSet(string $user, $id, Context $context = null, bool $remove = false, bool $byName = false): bool {
+    public function labelArticlesSet(string $user, $id, Context $context = null, bool $remove = false, bool $byName = false): int {
         if (!Arsse::$user->authorize($user, __FUNCTION__)) {
             throw new User\ExceptionAuthz("notAuthorized", ["action" => __FUNCTION__, "user" => $user]);
         }
@@ -1291,7 +1291,7 @@ class Database {
         }
         // commit the transaction
         $tr->commit();
-        return (bool) $out;
+        return $out;
     }
 
     protected function labelValidateId(string $user, $id, bool $byName, bool $checkDb = true, bool $subject = false): array {
diff --git a/lib/REST/TinyTinyRSS/API.php b/lib/REST/TinyTinyRSS/API.php
index 0d6726a..dc440de 100644
--- a/lib/REST/TinyTinyRSS/API.php
+++ b/lib/REST/TinyTinyRSS/API.php
@@ -75,6 +75,7 @@ class API extends \JKingWeb\Arsse\REST\AbstractHandler {
         'mode'                => ValueInfo::T_INT,
         'field'               => ValueInfo::T_INT,
         'data'                => ValueInfo::T_STRING,
+        'pref_name'           => ValueInfo::T_STRING,
     ];
     const FATAL_ERR = [
         'seq'     => null,
@@ -641,11 +642,20 @@ class API extends \JKingWeb\Arsse\REST\AbstractHandler {
     }
 
     public function opSetArticleLabel(array $data): array {
-        if (!$data['article_ids'] || !$data['label_id']) {
-            throw new Exception("INCORRECT_USAGE");
-        }
         $label = $this->labelIn($data['label_id']);
         $articles = explode(",", $data['article_ids']);
         $assign = $data['assign'] ?? false;
+        $out = 0;
+        $in = array_chunk($data['article_ids'], 50);
+        for ($a = 0; $a < sizeof($in); $a++) {
+            // initialize the matching context
+            $c = new Context;
+            $c->articles($in[$a]);
+            try {
+                $out += Arsse::$db->labelArticlesSet(Arsse::$user->id, $label, $c, !$assign);
+            } catch (ExceptionInput $e) {
+            }
+        }
+        return ['status' => "OK", 'updated' => $out];
     }
 }
diff --git a/tests/REST/NextCloudNews/TestNCNV1_2.php b/tests/REST/NextCloudNews/TestNCNV1_2.php
index 53aaba3..f72f10d 100644
--- a/tests/REST/NextCloudNews/TestNCNV1_2.php
+++ b/tests/REST/NextCloudNews/TestNCNV1_2.php
@@ -703,7 +703,7 @@ class TestNCNV1_2 extends Test\AbstractTest {
     public function testMarkAFolderRead() {
         $read = ['read' => true];
         $in = json_encode(['newestItemId' => 2112]);
-        Phake::when(Arsse::$db)->articleMark(Arsse::$user->id, $read, (new Context)->folder(1)->latestEdition(2112))->thenReturn(true);
+        Phake::when(Arsse::$db)->articleMark(Arsse::$user->id, $read, (new Context)->folder(1)->latestEdition(2112))->thenReturn(42);
         Phake::when(Arsse::$db)->articleMark(Arsse::$user->id, $read, (new Context)->folder(42)->latestEdition(2112))->thenThrow(new ExceptionInput("idMissing")); // folder doesn't exist
         $exp = new Response(204);
         $this->assertEquals($exp, $this->h->dispatch(new Request("PUT", "/folders/1/read", $in, 'application/json')));
@@ -718,7 +718,7 @@ class TestNCNV1_2 extends Test\AbstractTest {
     public function testMarkASubscriptionRead() {
         $read = ['read' => true];
         $in = json_encode(['newestItemId' => 2112]);
-        Phake::when(Arsse::$db)->articleMark(Arsse::$user->id, $read, (new Context)->subscription(1)->latestEdition(2112))->thenReturn(true);
+        Phake::when(Arsse::$db)->articleMark(Arsse::$user->id, $read, (new Context)->subscription(1)->latestEdition(2112))->thenReturn(42);
         Phake::when(Arsse::$db)->articleMark(Arsse::$user->id, $read, (new Context)->subscription(42)->latestEdition(2112))->thenThrow(new ExceptionInput("idMissing")); // subscription doesn't exist
         $exp = new Response(204);
         $this->assertEquals($exp, $this->h->dispatch(new Request("PUT", "/feeds/1/read", $in, 'application/json')));
@@ -733,7 +733,7 @@ class TestNCNV1_2 extends Test\AbstractTest {
     public function testMarkAllItemsRead() {
         $read = ['read' => true];
         $in = json_encode(['newestItemId' => 2112]);
-        Phake::when(Arsse::$db)->articleMark(Arsse::$user->id, $read, (new Context)->latestEdition(2112))->thenReturn(true);
+        Phake::when(Arsse::$db)->articleMark(Arsse::$user->id, $read, (new Context)->latestEdition(2112))->thenReturn(42);
         $exp = new Response(204);
         $this->assertEquals($exp, $this->h->dispatch(new Request("PUT", "/items/read", $in, 'application/json')));
         $this->assertEquals($exp, $this->h->dispatch(new Request("PUT", "/items/read?newestItemId=2112")));
@@ -747,13 +747,13 @@ class TestNCNV1_2 extends Test\AbstractTest {
         $unread = ['read' => false];
         $star = ['starred' => true];
         $unstar = ['starred' => false];
-        Phake::when(Arsse::$db)->articleMark(Arsse::$user->id, $read, (new Context)->edition(1))->thenReturn(true);
+        Phake::when(Arsse::$db)->articleMark(Arsse::$user->id, $read, (new Context)->edition(1))->thenReturn(42);
         Phake::when(Arsse::$db)->articleMark(Arsse::$user->id, $read, (new Context)->edition(42))->thenThrow(new ExceptionInput("subjectMissing")); // edition doesn't exist doesn't exist
-        Phake::when(Arsse::$db)->articleMark(Arsse::$user->id, $unread, (new Context)->edition(2))->thenReturn(true);
+        Phake::when(Arsse::$db)->articleMark(Arsse::$user->id, $unread, (new Context)->edition(2))->thenReturn(42);
         Phake::when(Arsse::$db)->articleMark(Arsse::$user->id, $unread, (new Context)->edition(47))->thenThrow(new ExceptionInput("subjectMissing")); // edition doesn't exist doesn't exist
-        Phake::when(Arsse::$db)->articleMark(Arsse::$user->id, $star, (new Context)->article(3))->thenReturn(true);
+        Phake::when(Arsse::$db)->articleMark(Arsse::$user->id, $star, (new Context)->article(3))->thenReturn(42);
         Phake::when(Arsse::$db)->articleMark(Arsse::$user->id, $star, (new Context)->article(2112))->thenThrow(new ExceptionInput("subjectMissing")); // article doesn't exist doesn't exist
-        Phake::when(Arsse::$db)->articleMark(Arsse::$user->id, $unstar, (new Context)->article(4))->thenReturn(true);
+        Phake::when(Arsse::$db)->articleMark(Arsse::$user->id, $unstar, (new Context)->article(4))->thenReturn(42);
         Phake::when(Arsse::$db)->articleMark(Arsse::$user->id, $unstar, (new Context)->article(1337))->thenThrow(new ExceptionInput("subjectMissing")); // article doesn't exist doesn't exist
         $exp = new Response(204);
         $this->assertEquals($exp, $this->h->dispatch(new Request("PUT", "/items/1/read")));
@@ -785,7 +785,7 @@ class TestNCNV1_2 extends Test\AbstractTest {
                 $inStar[$a][$b] = ['feedId' => 2112, 'guidHash' => $inStar[$a][$b]];
             }
         }
-        Phake::when(Arsse::$db)->articleMark(Arsse::$user->id, $this->anything(), $this->anything())->thenReturn(true);
+        Phake::when(Arsse::$db)->articleMark(Arsse::$user->id, $this->anything(), $this->anything())->thenReturn(42);
         Phake::when(Arsse::$db)->articleMark(Arsse::$user->id, $this->anything(), (new Context)->editions([]))->thenThrow(new ExceptionInput("tooShort")); // data model function requires one valid integer for multiples
         Phake::when(Arsse::$db)->articleMark(Arsse::$user->id, $this->anything(), (new Context)->editions($in[1]))->thenThrow(new ExceptionInput("tooLong")); // data model function limited to 50 items for multiples
         Phake::when(Arsse::$db)->articleMark(Arsse::$user->id, $this->anything(), (new Context)->articles([]))->thenThrow(new ExceptionInput("tooShort")); // data model function requires one valid integer for multiples