diff --git a/crates/api_clients/fal_client/src/webhook_api/hydrated/success_case_extractors/extract_model_glb_payload.rs b/crates/api_clients/fal_client/src/webhook_api/hydrated/success_case_extractors/extract_model_glb_payload.rs
index 25598cf3fc..24dffc9ea1 100644
--- a/crates/api_clients/fal_client/src/webhook_api/hydrated/success_case_extractors/extract_model_glb_payload.rs
+++ b/crates/api_clients/fal_client/src/webhook_api/hydrated/success_case_extractors/extract_model_glb_payload.rs
@@ -11,6 +11,45 @@ pub (crate) fn extract_model_glb(obj: &Map<String, Value>) -> Option<ModelGlbDat
 #[cfg(test)]
 mod tests {
   use super::*;
+  use crate::webhook_api::hydrate_webhook_contents::hydrate_webhook_contents;
+  use crate::webhook_api::hydrated::hydrated_webhook_contents::HydratedWebhookContents;
+  use crate::webhook_api::raw::raw_webhook_payload::RawWebhookPayload;
+
+  fn load_test_webhook(filename: &str) -> RawWebhookPayload {
+    let path = format!("test_data/webhooks/{}", filename);
+    let json = std::fs::read_to_string(&path)
+      .unwrap_or_else(|e| panic!("Failed to read {}: {}", path, e));
+    serde_json::from_str(&json)
+      .unwrap_or_else(|e| panic!("Failed to parse {}: {}", path, e))
+  }
+
+  #[test]
+  fn model_glb_from_test_file() {
+    let webhook = load_test_webhook("success/model_glb_urls_and_thumbnail_1.json");
+    let result = hydrate_webhook_contents(&webhook);
+
+    let HydratedWebhookContents::Success(data) = result else {
+      panic!("Expected Success, got {:?}", result);
+    };
+
+    let contents = data.extracted_contents
+      .expect("extracted_contents should be Some");
+
+    let glb = contents.model_glb.expect("model_glb should be Some");
+    assert_eq!(glb.url.as_deref(), Some("https://v3b.fal.media/files/b/0a95eb37/f7UaAhyfcx0BAnYy0GpFM_model.glb"));
+    assert_eq!(glb.content_type.as_deref(), Some("model/gltf-binary"));
+    assert_eq!(glb.file_name.as_deref(), Some("model.glb"));
+    assert_eq!(glb.file_size, Some(66284788));
+
+    // This payload also has a thumbnail.
+    assert!(contents.thumbnail.is_some());
+
+    // No image/images/video/mesh in this payload.
+    assert!(contents.image.is_none());
+    assert!(contents.images.is_none());
+    assert!(contents.video.is_none());
+    assert!(contents.model_mesh.is_none());
+  }
 
   #[test]
   fn synthetic_model_glb_payload() {
diff --git a/crates/api_clients/fal_client/src/webhook_api/hydrated/success_case_extractors/extract_model_mesh_payload.rs b/crates/api_clients/fal_client/src/webhook_api/hydrated/success_case_extractors/extract_model_mesh_payload.rs
index 5079ec0315..e30bf1d031 100644
--- a/crates/api_clients/fal_client/src/webhook_api/hydrated/success_case_extractors/extract_model_mesh_payload.rs
+++ b/crates/api_clients/fal_client/src/webhook_api/hydrated/success_case_extractors/extract_model_mesh_payload.rs
@@ -11,6 +11,43 @@ pub (crate) fn extract_model_mesh(obj: &Map<String, Value>) -> Option<ModelMeshD
 #[cfg(test)]
 mod tests {
   use super::*;
+  use crate::webhook_api::hydrate_webhook_contents::hydrate_webhook_contents;
+  use crate::webhook_api::hydrated::hydrated_webhook_contents::HydratedWebhookContents;
+  use crate::webhook_api::raw::raw_webhook_payload::RawWebhookPayload;
+
+  fn load_test_webhook(filename: &str) -> RawWebhookPayload {
+    let path = format!("test_data/webhooks/{}", filename);
+    let json = std::fs::read_to_string(&path)
+      .unwrap_or_else(|e| panic!("Failed to read {}: {}", path, e));
+    serde_json::from_str(&json)
+      .unwrap_or_else(|e| panic!("Failed to parse {}: {}", path, e))
+  }
+
+  #[test]
+  fn model_mesh_from_test_file() {
+    let webhook = load_test_webhook("success/model_mesh_payload_1.json");
+    let result = hydrate_webhook_contents(&webhook);
+
+    let HydratedWebhookContents::Success(data) = result else {
+      panic!("Expected Success, got {:?}", result);
+    };
+
+    let contents = data.extracted_contents
+      .expect("extracted_contents should be Some");
+
+    let mesh = contents.model_mesh.expect("model_mesh should be Some");
+    assert_eq!(mesh.url.as_deref(), Some("https://v3b.fal.media/files/b/0a95eb2d/XCpH7fk-tZVXr1XMUr7DY_mesh-1775972273-765284.glb"));
+    assert_eq!(mesh.content_type.as_deref(), Some("application/octet-stream"));
+    assert_eq!(mesh.file_name.as_deref(), Some("mesh-1775972273-765284.glb"));
+    assert_eq!(mesh.file_size, Some(3886928));
+
+    // No other content types in this payload.
+    assert!(contents.image.is_none());
+    assert!(contents.images.is_none());
+    assert!(contents.video.is_none());
+    assert!(contents.model_glb.is_none());
+    assert!(contents.thumbnail.is_none());
+  }
 
   #[test]
   fn synthetic_model_mesh_payload() {
diff --git a/crates/api_clients/fal_client/src/webhook_api/hydrated/success_case_extractors/extract_thumbnail_payload.rs b/crates/api_clients/fal_client/src/webhook_api/hydrated/success_case_extractors/extract_thumbnail_payload.rs
new file mode 100644
index 0000000000..c3241732be
--- /dev/null
+++ b/crates/api_clients/fal_client/src/webhook_api/hydrated/success_case_extractors/extract_thumbnail_payload.rs
@@ -0,0 +1,86 @@
+use serde_json::{Map, Value};
+
+use crate::webhook_api::hydrated::hydrated_webhook_contents::ThumbnailData;
+
+/// Extract and deserialize the `thumbnail` key from a webhook success payload.
+pub(crate) fn extract_thumbnail(obj: &Map<String, Value>) -> Option<ThumbnailData> {
+  let value = obj.get("thumbnail")?;
+  serde_json::from_value(value.clone()).ok()
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  use crate::webhook_api::hydrate_webhook_contents::hydrate_webhook_contents;
+  use crate::webhook_api::hydrated::hydrated_webhook_contents::HydratedWebhookContents;
+  use crate::webhook_api::raw::raw_webhook_payload::RawWebhookPayload;
+
+  fn load_test_webhook(filename: &str) -> RawWebhookPayload {
+    let path = format!("test_data/webhooks/{}", filename);
+    let json = std::fs::read_to_string(&path)
+      .unwrap_or_else(|e| panic!("Failed to read {}: {}", path, e));
+    serde_json::from_str(&json)
+      .unwrap_or_else(|e| panic!("Failed to parse {}: {}", path, e))
+  }
+
+  #[test]
+  fn thumbnail_from_model_glb_test_file() {
+    let webhook = load_test_webhook("success/model_glb_urls_and_thumbnail_1.json");
+    let result = hydrate_webhook_contents(&webhook);
+
+    let HydratedWebhookContents::Success(data) = result else {
+      panic!("Expected Success, got {:?}", result);
+    };
+
+    let contents = data.extracted_contents
+      .expect("extracted_contents should be Some");
+
+    let thumbnail = contents.thumbnail.expect("thumbnail should be Some");
+    assert_eq!(thumbnail.url.as_deref(), Some("https://v3b.fal.media/files/b/0a95eb38/yvwGJWZV9TkWZuZvjxZNj_preview.png"));
+    assert_eq!(thumbnail.content_type.as_deref(), Some("image/png"));
+    assert_eq!(thumbnail.file_name.as_deref(), Some("preview.png"));
+    assert_eq!(thumbnail.file_size, Some(93436));
+  }
+
+  #[test]
+  fn synthetic_thumbnail_payload() {
+    let obj: serde_json::Map<String, serde_json::Value> = serde_json::from_str(r#"{
+      "thumbnail": {
+        "url": "https://cdn.example.com/thumb.png",
+        "content_type": "image/png",
+        "file_name": "thumb.png",
+        "file_size": 12345
+      }
+    }"#).unwrap();
+
+    let thumb = extract_thumbnail(&obj).expect("should extract thumbnail");
+    assert_eq!(thumb.url.as_deref(), Some("https://cdn.example.com/thumb.png"));
+    assert_eq!(thumb.content_type.as_deref(), Some("image/png"));
+    assert_eq!(thumb.file_name.as_deref(), Some("thumb.png"));
+    assert_eq!(thumb.file_size, Some(12345));
+  }
+
+  #[test]
+  fn missing_thumbnail_key_returns_none() {
+    let obj: serde_json::Map<String, serde_json::Value> = serde_json::from_str(r#"{
+      "model_glb": {"url": "https://example.com/model.glb"}
+    }"#).unwrap();
+
+    assert!(extract_thumbnail(&obj).is_none());
+  }
+
+  #[test]
+  fn model_mesh_payload_has_no_thumbnail() {
+    let webhook = load_test_webhook("success/model_mesh_payload_1.json");
+    let result = hydrate_webhook_contents(&webhook);
+
+    let HydratedWebhookContents::Success(data) = result else {
+      panic!("Expected Success, got {:?}", result);
+    };
+
+    let contents = data.extracted_contents
+      .expect("extracted_contents should be Some");
+
+    assert!(contents.thumbnail.is_none());
+  }
+}
diff --git a/crates/api_clients/fal_client/src/webhook_api/hydrated/success_case_extractors/mod.rs b/crates/api_clients/fal_client/src/webhook_api/hydrated/success_case_extractors/mod.rs
index 8f7c25342d..cd40e6e06d 100644
--- a/crates/api_clients/fal_client/src/webhook_api/hydrated/success_case_extractors/mod.rs
+++ b/crates/api_clients/fal_client/src/webhook_api/hydrated/success_case_extractors/mod.rs
@@ -3,6 +3,7 @@ pub mod extract_images_payload;
 pub mod extract_video_payload;
 pub mod extract_model_glb_payload;
 pub mod extract_model_mesh_payload;
+pub mod extract_thumbnail_payload;
 
 use serde_json::Value;
 
@@ -23,8 +24,11 @@ pub fn extract_contents_from_payload(payload: &Value) -> Option<ExtractedContent
   let video = extract_video_payload::extract_video(obj);
   let model_glb = extract_model_glb_payload::extract_model_glb(obj);
   let model_mesh = extract_model_mesh_payload::extract_model_mesh(obj);
+  let thumbnail = extract_thumbnail_payload::extract_thumbnail(obj);
 
-  if image.is_none() && images.is_none() && video.is_none() && model_glb.is_none() && model_mesh.is_none() {
+  if image.is_none() && images.is_none() && video.is_none()
+    && model_glb.is_none() && model_mesh.is_none() && thumbnail.is_none()
+  {
     return None;
   }
 
@@ -34,5 +38,6 @@ pub fn extract_contents_from_payload(payload: &Value) -> Option<ExtractedContent
     video,
     model_glb,
     model_mesh,
+    thumbnail,
   })
 }