diff --git a/src/http-client/src/Response.php b/src/http-client/src/Response.php
index 9abc4b5ff..95aa125d3 100644
--- a/src/http-client/src/Response.php
+++ b/src/http-client/src/Response.php
@@ -33,6 +33,11 @@ class Response implements ArrayAccess, Stringable
      */
     protected array $decoded = [];
 
+    /**
+     * The custom decode callback.
+     */
+    protected ?Closure $decodeUsing = null;
+
     /**
      * The request cookies.
      */
@@ -64,7 +69,7 @@ public function body(): string
     public function json(?string $key = null, mixed $default = null): mixed
     {
         if (! $this->decoded) {
-            $this->decoded = json_decode($this->body(), true) ?? [];
+            $this->decoded = $this->decode($this->body());
         }
 
         if (is_null($key)) {
@@ -88,7 +93,34 @@ public function json(?string $key = null, mixed $default = null): mixed
      */
     public function object(): array|object|null
     {
-        return json_decode($this->body(), false);
+        return $this->decode($this->body(), true);
+    }
+
+    /**
+     * Set a custom decode callback.
+     *
+     * The callback will be invoked with the following parameters:
+     * - string $body: The raw response body.
+     * - bool   $asObject: When true, the decoder should return an array of objects.
+     */
+    public function decodeUsing(?Closure $callback): static
+    {
+        $this->decodeUsing = $callback;
+        $this->decoded = [];
+
+        return $this;
+    }
+
+    /**
+     * Decode the given response body.
+     */
+    protected function decode(string $body, bool $asObject = false): array|object|null
+    {
+        if ($this->decodeUsing instanceof Closure) {
+            return ($this->decodeUsing)($body, $asObject);
+        }
+
+        return json_decode($body, ! $asObject);
     }
 
     /**
diff --git a/tests/HttpClient/HttpClientTest.php b/tests/HttpClient/HttpClientTest.php
index 1b00eceb3..9849bef4d 100644
--- a/tests/HttpClient/HttpClientTest.php
+++ b/tests/HttpClient/HttpClientTest.php
@@ -430,6 +430,29 @@ public function testResponseCanBeReturnedAsFluent()
         $this->assertEquals(new Fluent([]), $response->fluent('missing_key'));
     }
 
+    public function testResponseDecodeUsingWithDifferentFormats()
+    {
+        $this->factory->fake([
+            '*' => 'name:Taylor|framework:Laravel',
+        ]);
+
+        $response = $this->factory->get('http://foo.com/api')->decodeUsing(function ($body) {
+            $parts = explode('|', $body);
+            $result = [];
+
+            foreach ($parts as $part) {
+                [$key, $value] = explode(':', $part);
+                $result[$key] = $value;
+            }
+
+            return $result;
+        });
+
+        $this->assertSame('Taylor', $response->json('name'));
+        $this->assertSame('Laravel', $response->json('framework'));
+        $this->assertIsArray($response->json());
+    }
+
     public function testSendRequestBodyAsJsonByDefault()
     {
         $body = '{"test":"phpunit"}';