diff --git a/src/API/Backends/Library/Index.php b/src/API/Backends/Library/Index.php
new file mode 100644
index 00000000..b7b36e75
--- /dev/null
+++ b/src/API/Backends/Library/Index.php
@@ -0,0 +1,121 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\API\Backends\Library;
+
+use App\API\Backends\Index as BackendsIndex;
+use App\Libs\Attributes\Route\Delete;
+use App\Libs\Attributes\Route\Get;
+use App\Libs\Attributes\Route\Post;
+use App\Libs\Config;
+use App\Libs\ConfigFile;
+use App\Libs\DataUtil;
+use App\Libs\Exceptions\RuntimeException;
+use App\Libs\HTTP_STATUS;
+use App\Libs\Options;
+use App\Libs\Traits\APITraits;
+use Psr\Http\Message\ResponseInterface as iResponse;
+use Psr\Http\Message\ServerRequestInterface as iRequest;
+
+final class Index
+{
+    use APITraits;
+
+    #[Get(BackendsIndex::URL . '/{name:backend}/library[/]', name: 'backends.library.list')]
+    public function listLibraries(iRequest $request, array $args = []): iResponse
+    {
+        if (null === ($name = ag($args, 'name'))) {
+            return api_error('No backend was given.', HTTP_STATUS::HTTP_BAD_REQUEST);
+        }
+
+        try {
+            $client = $this->getClient(name: $name);
+        } catch (RuntimeException $e) {
+            return api_error($e->getMessage(), HTTP_STATUS::HTTP_NOT_FOUND);
+        }
+
+        $response = [
+            'type' => ag(array_flip(Config::get('supported')), $client::class),
+            'libraries' => $client->listLibraries(),
+            'links' => [
+                'self' => (string)parseConfigValue(BackendsIndex::URL . "/{$name}/library"),
+                'backend' => (string)parseConfigValue(BackendsIndex::URL . "/{$name}"),
+            ],
+        ];
+
+        return api_response(HTTP_STATUS::HTTP_OK, $response);
+    }
+
+    #[Post(BackendsIndex::URL . '/{name:backend}/library[/]', name: 'backends.library.ignore')]
+    public function ignoreLibrary(iRequest $request, array $args = []): iResponse
+    {
+        if (null === ($name = ag($args, 'name'))) {
+            return api_error('No backend was given.', HTTP_STATUS::HTTP_BAD_REQUEST);
+        }
+
+        if (null === ($id = DataUtil::fromRequest($request)->get('id', null))) {
+            return api_error('No library id was given.', HTTP_STATUS::HTTP_BAD_REQUEST);
+        }
+
+        $remove = 'DELETE' === $request->getMethod();
+
+        $config = ConfigFile::open(Config::get('backends_file'), 'yaml');
+
+        if (null === $config->get($name)) {
+            return api_error(r("Backend '{backend}' not found.", ['backend' => $name]), HTTP_STATUS::HTTP_NOT_FOUND);
+        }
+
+        $ignoreIds = array_map(
+            fn($v) => trim($v),
+            explode(',', (string)$config->get("{$name}.options." . Options::IGNORE, ''))
+        );
+
+        $mode = !(true === $remove);
+        if ($mode === in_array($id, $ignoreIds)) {
+            return api_error(r("Library id '{id}' is {message} ignored.", [
+                'id' => $id,
+                'message' => $remove ? "not" : 'already',
+            ]), $remove ? HTTP_STATUS::HTTP_NOT_FOUND : HTTP_STATUS::HTTP_CONFLICT);
+        }
+
+        $found = false;
+
+        $libraries = $this->getClient(name: $name)->listLibraries();
+        foreach ($libraries as &$library) {
+            if ((string)ag($library, 'id') === (string)$id) {
+                $ignoreIds[] = $id;
+                $library['ignored'] = !$remove;
+                $found = true;
+                break;
+            }
+        }
+
+        if (false === $found) {
+            return api_error(r("The library id '{id}' is incorrect.", ['id' => $name]), HTTP_STATUS::HTTP_NOT_FOUND, [
+                'possible_ids' => array_column($libraries, 'id'),
+            ]);
+        }
+
+        if (true === $remove) {
+            $ignoreIds = array_diff($ignoreIds, [$id]);
+        }
+
+        $config->set("{$name}.options." . Options::IGNORE, implode(',', array_values($ignoreIds)))->persist();
+
+        return api_response(HTTP_STATUS::HTTP_OK, [
+            'type' => $config->get("{$name}.type"),
+            'libraries' => $libraries,
+            'links' => [
+                'self' => (string)parseConfigValue(BackendsIndex::URL . "/{$name}/library"),
+                'backend' => (string)parseConfigValue(BackendsIndex::URL . "/{$name}"),
+            ],
+        ]);
+    }
+
+    #[Delete(BackendsIndex::URL . '/{name:backend}/library/{id}[/]', name: 'backends.library.ignore.delete')]
+    public function deleteIgnoreLibrary(iRequest $request, array $args = []): iResponse
+    {
+        return $this->ignoreLibrary($request->withParsedBody(['id' => ag($args, 'id')]), $args);
+    }
+}