diff --git a/app/Services/Social/FacebookPublisher.php b/app/Services/Social/FacebookPublisher.php
index 51e351ef..5fbfb4ea 100644
--- a/app/Services/Social/FacebookPublisher.php
+++ b/app/Services/Social/FacebookPublisher.php
@@ -9,6 +9,7 @@
 use App\Exceptions\Social\FacebookPublishException;
 use App\Models\PostPlatform;
 use App\Services\Social\Concerns\HasSocialHttpClient;
+use Illuminate\Http\Client\PendingRequest;
 use Illuminate\Http\Client\Response;
 use Illuminate\Support\Facades\Http;
 use Illuminate\Support\Facades\Log;
@@ -24,6 +25,15 @@ public function __construct()
         $this->baseUrl = config('trypost.platforms.facebook.graph_api');
     }
 
+    /**
+     * Graph API expects application/x-www-form-urlencoded (or multipart), not JSON.
+     * Sending JSON makes `message` work but silently drops `attached_media[*]` on /feed.
+     */
+    private function facebookHttp(): PendingRequest
+    {
+        return $this->socialHttp()->asForm();
+    }
+
     public function publish(PostPlatform $postPlatform): array
     {
         $this->validateContentLength($postPlatform);
@@ -78,7 +88,7 @@ private function publishPost(string $pageId, string $accessToken, ?string $conte
 
     private function publishTextPost(string $pageId, string $accessToken, string $content): array
     {
-        $response = $this->socialHttp()->post("{$this->baseUrl}/{$pageId}/feed", [
+        $response = $this->facebookHttp()->post("{$this->baseUrl}/{$pageId}/feed", [
             'message' => $content,
             'access_token' => $accessToken,
         ]);
@@ -111,7 +121,7 @@ private function publishSingleImagePost(string $pageId, string $accessToken, ?st
             $payload['message'] = $content;
         }
 
-        $response = $this->socialHttp()->post("{$this->baseUrl}/{$pageId}/photos", $payload);
+        $response = $this->facebookHttp()->post("{$this->baseUrl}/{$pageId}/photos", $payload);
 
         if ($response->failed()) {
             Log::error('Facebook single image post failed', [
@@ -140,7 +150,7 @@ private function publishMultiImagePost(string $pageId, string $accessToken, ?str
                 continue;
             }
 
-            $uploadResponse = $this->socialHttp()->post("{$this->baseUrl}/{$pageId}/photos", [
+            $uploadResponse = $this->facebookHttp()->post("{$this->baseUrl}/{$pageId}/photos", [
                 'url' => $media->url,
                 'published' => 'false',
                 'access_token' => $accessToken,
@@ -175,7 +185,7 @@ private function publishMultiImagePost(string $pageId, string $accessToken, ?str
             $postData["attached_media[{$index}]"] = json_encode($media);
         }
 
-        $response = $this->socialHttp()->post("{$this->baseUrl}/{$pageId}/feed", $postData);
+        $response = $this->facebookHttp()->post("{$this->baseUrl}/{$pageId}/feed", $postData);
 
         if ($response->failed()) {
             Log::error('Facebook multi-image post failed', [
@@ -205,7 +215,7 @@ private function publishVideoPost(string $pageId, string $accessToken, ?string $
             $payload['description'] = $content;
         }
 
-        $response = $this->socialHttp()->post("{$this->baseUrl}/{$pageId}/videos", $payload);
+        $response = $this->facebookHttp()->post("{$this->baseUrl}/{$pageId}/videos", $payload);
 
         if ($response->failed()) {
             Log::error('Facebook video post failed', [
@@ -227,7 +237,7 @@ private function publishVideoPost(string $pageId, string $accessToken, ?string $
     private function publishReel(string $pageId, string $accessToken, ?string $content, $media): array
     {
         // Phase 1 (start) — graph endpoint returns video_id + upload_url.
-        $startResponse = $this->socialHttp()->post("{$this->baseUrl}/{$pageId}/video_reels", [
+        $startResponse = $this->facebookHttp()->post("{$this->baseUrl}/{$pageId}/video_reels", [
             'upload_phase' => 'start',
             'access_token' => $accessToken,
         ]);
@@ -310,7 +320,7 @@ private function publishReel(string $pageId, string $accessToken, ?string $conte
             $finishPayload['description'] = $content;
         }
 
-        $finishResponse = $this->socialHttp()->post("{$this->baseUrl}/{$pageId}/video_reels", $finishPayload);
+        $finishResponse = $this->facebookHttp()->post("{$this->baseUrl}/{$pageId}/video_reels", $finishPayload);
 
         if ($finishResponse->failed()) {
             $this->handleApiError($finishResponse);
@@ -331,7 +341,7 @@ private function publishStory(string $pageId, string $accessToken, $media): arra
 
         if ($isVideo) {
             // Video story
-            $response = $this->socialHttp()->post("{$this->baseUrl}/{$pageId}/video_stories", [
+            $response = $this->facebookHttp()->post("{$this->baseUrl}/{$pageId}/video_stories", [
                 'upload_phase' => 'start',
                 'access_token' => $accessToken,
             ]);
@@ -347,7 +357,7 @@ private function publishStory(string $pageId, string $accessToken, $media): arra
             }
 
             // Transfer the video (Facebook accepts URL in video_file_chunk)
-            $transferResponse = $this->socialHttp()->post("{$this->baseUrl}/{$videoId}", [
+            $transferResponse = $this->facebookHttp()->post("{$this->baseUrl}/{$videoId}", [
                 'upload_phase' => 'transfer',
                 'video_file_chunk' => $media->url,
                 'access_token' => $accessToken,
@@ -359,7 +369,7 @@ private function publishStory(string $pageId, string $accessToken, $media): arra
             }
 
             // Finish the story
-            $finishResponse = $this->socialHttp()->post("{$this->baseUrl}/{$pageId}/video_stories", [
+            $finishResponse = $this->facebookHttp()->post("{$this->baseUrl}/{$pageId}/video_stories", [
                 'upload_phase' => 'finish',
                 'video_id' => $videoId,
                 'access_token' => $accessToken,
@@ -378,7 +388,7 @@ private function publishStory(string $pageId, string $accessToken, $media): arra
         }
 
         // Image story
-        $response = $this->socialHttp()->post("{$this->baseUrl}/{$pageId}/photo_stories", [
+        $response = $this->facebookHttp()->post("{$this->baseUrl}/{$pageId}/photo_stories", [
             'photo_id' => $this->uploadUnpublishedPhoto($pageId, $accessToken, $media),
             'access_token' => $accessToken,
         ]);
@@ -400,7 +410,7 @@ private function publishStory(string $pageId, string $accessToken, $media): arra
 
     private function uploadUnpublishedPhoto(string $pageId, string $accessToken, $media): string
     {
-        $response = $this->socialHttp()->post("{$this->baseUrl}/{$pageId}/photos", [
+        $response = $this->facebookHttp()->post("{$this->baseUrl}/{$pageId}/photos", [
             'url' => $media->url,
             'published' => 'false',
             'access_token' => $accessToken,
diff --git a/tests/Feature/Services/Social/FacebookPublisherTest.php b/tests/Feature/Services/Social/FacebookPublisherTest.php
index e1afe22e..9fc2fd7b 100644
--- a/tests/Feature/Services/Social/FacebookPublisherTest.php
+++ b/tests/Feature/Services/Social/FacebookPublisherTest.php
@@ -126,7 +126,36 @@
     expect($result['id'])->toBe('page_123_multi_post_789');
 
     Http::assertSent(function ($request) {
-        return str_contains($request->url(), '/page_123/feed');
+        return str_contains($request->url(), '/page_123/feed')
+            && str_contains($request->header('Content-Type')[0] ?? '', 'application/x-www-form-urlencoded')
+            && ($request->data()['attached_media[0]'] ?? null) === json_encode(['media_fbid' => 'photo_1'])
+            && ($request->data()['attached_media[1]'] ?? null) === json_encode(['media_fbid' => 'photo_2']);
+    });
+});
+
+test('facebook publisher sends graph api requests as form-urlencoded not json', function () {
+    $this->post->update([
+        'media' => [
+            [
+                'id' => 'test-media-id',
+                'path' => 'media/2026-01/image.jpg',
+                'url' => 'https://example.com/media/2026-01/image.jpg',
+                'mime_type' => 'image/jpeg',
+                'original_filename' => 'image.jpg',
+            ],
+        ],
+    ]);
+
+    Http::fake([
+        '*/page_123/photos' => Http::response(['id' => 'photo_123', 'post_id' => 'post_123'], 200),
+    ]);
+
+    $this->publisher->publish($this->postPlatform);
+
+    Http::assertSent(function ($request) {
+        return str_contains($request->url(), '/page_123/photos')
+            && str_contains($request->header('Content-Type')[0] ?? '', 'application/x-www-form-urlencoded')
+            && ! str_contains($request->header('Content-Type')[0] ?? '', 'application/json');
     });
 });