diff --git a/extensions/tags/src/Content/Tag.php b/extensions/tags/src/Content/Tag.php
index 1b683e763..b7c7500fa 100644
--- a/extensions/tags/src/Content/Tag.php
+++ b/extensions/tags/src/Content/Tag.php
@@ -10,6 +10,7 @@
 namespace Flarum\Tags\Content;
 
 use Flarum\Api\Client;
+use Flarum\Api\Resource\DiscussionResource;
 use Flarum\Frontend\Document;
 use Flarum\Http\RequestUtil;
 use Flarum\Http\SlugManager;
@@ -27,7 +28,8 @@ class Tag
         protected Factory $view,
         protected TagRepository $tags,
         protected TranslatorInterface $translator,
-        protected SlugManager $slugger
+        protected SlugManager $slugger,
+        protected DiscussionResource $resource
     ) {
     }
 
@@ -42,7 +44,7 @@ class Tag
         $page = Arr::pull($queryParams, 'page', 1);
         $filters = Arr::pull($queryParams, 'filter', []);
 
-        $sortMap = $this->getSortMap();
+        $sortMap = $this->resource->sortMap();
 
         $tag = $this->slugger->forResource(TagModel::class)->fromSlug($slug, $actor);
 
@@ -78,14 +80,6 @@ class Tag
         return $document;
     }
 
-    /**
-     * Get a map of sort query param values and their API sort params.
-     */
-    protected function getSortMap(): array
-    {
-        return resolve('flarum.forum.discussions.sortmap');
-    }
-
     /**
      * Get the result of an API request to list discussions.
      */
diff --git a/framework/core/src/Api/Resource/AbstractDatabaseResource.php b/framework/core/src/Api/Resource/AbstractDatabaseResource.php
index b1429967c..c9faa998a 100644
--- a/framework/core/src/Api/Resource/AbstractDatabaseResource.php
+++ b/framework/core/src/Api/Resource/AbstractDatabaseResource.php
@@ -12,6 +12,7 @@ use Flarum\Api\Resource\Contracts\{Findable,
     Deletable};
 use Flarum\Api\Resource\Concerns\Bootable;
 use Flarum\Api\Resource\Concerns\Extendable;
+use Flarum\Api\Resource\Concerns\HasSortMap;
 use Flarum\Foundation\DispatchEventsTrait;
 use Flarum\User\User;
 use RuntimeException;
@@ -30,6 +31,7 @@ abstract class AbstractDatabaseResource extends BaseResource implements
 {
     use Bootable;
     use Extendable;
+    use HasSortMap;
     use DispatchEventsTrait {
         dispatchEventsFor as traitDispatchEventsFor;
     }
diff --git a/framework/core/src/Api/Resource/AbstractResource.php b/framework/core/src/Api/Resource/AbstractResource.php
index deee2bccd..7ad30b8c6 100644
--- a/framework/core/src/Api/Resource/AbstractResource.php
+++ b/framework/core/src/Api/Resource/AbstractResource.php
@@ -4,6 +4,7 @@ namespace Flarum\Api\Resource;
 
 use Flarum\Api\Resource\Concerns\Bootable;
 use Flarum\Api\Resource\Concerns\Extendable;
+use Flarum\Api\Resource\Concerns\HasSortMap;
 use Flarum\Api\Resource\Contracts\Collection;
 use Flarum\Api\Resource\Contracts\Resource;
 use Tobyz\JsonApiServer\Resource\AbstractResource as BaseResource;
@@ -12,4 +13,5 @@ abstract class AbstractResource extends BaseResource implements Resource, Collec
 {
     use Bootable;
     use Extendable;
+    use HasSortMap;
 }
diff --git a/framework/core/src/Api/Resource/Concerns/HasSortMap.php b/framework/core/src/Api/Resource/Concerns/HasSortMap.php
new file mode 100644
index 000000000..4c197d40d
--- /dev/null
+++ b/framework/core/src/Api/Resource/Concerns/HasSortMap.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace Flarum\Api\Resource\Concerns;
+
+use Flarum\Api\Sort\SortColumn;
+
+trait HasSortMap
+{
+    public function sortMap(): array
+    {
+        /** @var SortColumn[] $sorts */
+        $sorts = $this->resolveSorts();
+
+        $map = [];
+
+        foreach ($sorts as $sort) {
+            $map = array_merge($map, $sort->sortMap());
+        }
+
+        return $map;
+    }
+}
diff --git a/framework/core/src/Api/Resource/DiscussionResource.php b/framework/core/src/Api/Resource/DiscussionResource.php
index eceda452c..7ee42c1c7 100644
--- a/framework/core/src/Api/Resource/DiscussionResource.php
+++ b/framework/core/src/Api/Resource/DiscussionResource.php
@@ -246,9 +246,13 @@ class DiscussionResource extends AbstractDatabaseResource
     public function sorts(): array
     {
         return [
-            SortColumn::make('lastPostedAt'),
-            SortColumn::make('commentCount'),
-            SortColumn::make('createdAt'),
+            SortColumn::make('lastPostedAt')
+                ->descendingAlias('latest'),
+            SortColumn::make('commentCount')
+                ->descendingAlias('top'),
+            SortColumn::make('createdAt')
+                ->ascendingAlias('oldest')
+                ->descendingAlias('newest'),
         ];
     }
 
diff --git a/framework/core/src/Api/Sort/SortColumn.php b/framework/core/src/Api/Sort/SortColumn.php
index 492e348d0..e0a11c312 100644
--- a/framework/core/src/Api/Sort/SortColumn.php
+++ b/framework/core/src/Api/Sort/SortColumn.php
@@ -6,5 +6,36 @@ use Tobyz\JsonApiServer\Laravel\Sort\SortColumn as BaseSortColumn;
 
 class SortColumn extends BaseSortColumn
 {
-    //
+    protected array $alias = [
+        'asc' => null,
+        'desc' => null,
+    ];
+
+    public function ascendingAlias(?string $alias): static
+    {
+        $this->alias['asc'] = $alias;
+
+        return $this;
+    }
+
+    public function descendingAlias(?string $alias): static
+    {
+        $this->alias['desc'] = $alias;
+
+        return $this;
+    }
+
+    public function sortMap(): array
+    {
+        $map = [];
+
+        foreach ($this->alias as $direction => $alias) {
+            if ($alias) {
+                $sort = ($direction === 'asc' ? '' : '-') . $this->name;
+                $map[$alias] = $sort;
+            }
+        }
+
+        return $map;
+    }
 }
diff --git a/framework/core/src/Forum/Content/Index.php b/framework/core/src/Forum/Content/Index.php
index ff67aa3ea..6120494ef 100644
--- a/framework/core/src/Forum/Content/Index.php
+++ b/framework/core/src/Forum/Content/Index.php
@@ -10,6 +10,7 @@
 namespace Flarum\Forum\Content;
 
 use Flarum\Api\Client;
+use Flarum\Api\Resource\DiscussionResource;
 use Flarum\Frontend\Document;
 use Flarum\Http\UrlGenerator;
 use Flarum\Locale\TranslatorInterface;
@@ -26,6 +27,7 @@ class Index
         protected SettingsRepositoryInterface $settings,
         protected UrlGenerator $url,
         protected TranslatorInterface $translator,
+        protected DiscussionResource $resource,
     ) {
     }
 
@@ -37,7 +39,7 @@ class Index
         $q = Arr::pull($queryParams, 'q');
         $page = max(1, intval(Arr::pull($queryParams, 'page')));
 
-        $sortMap = resolve('flarum.forum.discussions.sortmap');
+        $sortMap = $this->resource->sortMap();
 
         $params = [
             ...$queryParams,