diff --git a/src/Handler/Index.php b/src/Handler/Index.php
index 3997e8e..e9be6d4 100644
--- a/src/Handler/Index.php
+++ b/src/Handler/Index.php
@@ -27,6 +27,7 @@ use Tobyz\JsonApiServer\Schema\Attribute;
 use Tobyz\JsonApiServer\Schema\HasMany;
 use Tobyz\JsonApiServer\Schema\HasOne;
 use Tobyz\JsonApiServer\Serializer;
+use function Tobyz\JsonApiServer\evaluate;
 use function Tobyz\JsonApiServer\run_callbacks;
 
 class Index implements RequestHandlerInterface
@@ -162,7 +163,7 @@ class Index implements RequestHandlerInterface
             if (
                 isset($fields[$name])
                 && $fields[$name] instanceof Attribute
-                && $fields[$name]->isSortable()
+                && evaluate($fields[$name]->isSortable(), [$request])
             ) {
                 $adapter->sortByAttribute($query, $fields[$name], $direction);
                 continue;
@@ -249,7 +250,7 @@ class Index implements RequestHandlerInterface
                 continue;
             }
 
-            if (isset($fields[$name]) && $fields[$name]->isFilterable()) {
+            if (isset($fields[$name]) && evaluate($fields[$name]->isFilterable(), [$request])) {
                 if ($fields[$name] instanceof Attribute) {
                     $adapter->filterByAttribute($query, $fields[$name], $value);
                 } elseif ($fields[$name] instanceof HasOne) {
diff --git a/src/Schema/Attribute.php b/src/Schema/Attribute.php
index 2d5c20b..3180d9f 100644
--- a/src/Schema/Attribute.php
+++ b/src/Schema/Attribute.php
@@ -11,6 +11,8 @@
 
 namespace Tobyz\JsonApiServer\Schema;
 
+use function Tobyz\JsonApiServer\negate;
+
 final class Attribute extends Field
 {
     private $sortable = false;
@@ -23,9 +25,9 @@ final class Attribute extends Field
     /**
      * Allow this attribute to be used for sorting the resource listing.
      */
-    public function sortable()
+    public function sortable(callable $condition = null)
     {
-        $this->sortable = true;
+        $this->sortable = $condition ?: true;
 
         return $this;
     }
@@ -33,14 +35,14 @@ final class Attribute extends Field
     /**
      * Disallow this attribute to be used for sorting the resource listing.
      */
-    public function notSortable()
+    public function notSortable(callable $condition = null)
     {
-        $this->sortable = false;
+        $this->sortable = $condition ? negate($condition) : false;
 
         return $this;
     }
 
-    public function isSortable(): bool
+    public function isSortable()
     {
         return $this->sortable;
     }
diff --git a/src/Schema/Field.php b/src/Schema/Field.php
index 0f44136..5fdf4b1 100644
--- a/src/Schema/Field.php
+++ b/src/Schema/Field.php
@@ -178,9 +178,9 @@ abstract class Field
     /**
      * Allow this field to be used for filtering the resource listing.
      */
-    public function filterable()
+    public function filterable(callable $condition = null)
     {
-        $this->filterable = true;
+        $this->filterable = $condition ?: true;
 
         return $this;
     }
@@ -188,9 +188,9 @@ abstract class Field
     /**
      * Disallow this field to be used for filtering the resource listing.
      */
-    public function notFilterable()
+    public function notFilterable(callable $condition = null)
     {
-        $this->filterable = false;
+        $this->filterable = $condition ? negate($condition) : false;
 
         return $this;
     }
@@ -240,7 +240,7 @@ abstract class Field
         return $this->defaultCallback;
     }
 
-    public function isFilterable(): bool
+    public function isFilterable()
     {
         return $this->filterable;
     }