diff --git a/src/client/file-client.ts b/src/client/file-client.ts
index 30d2767..e045890 100644
--- a/src/client/file-client.ts
+++ b/src/client/file-client.ts
@@ -25,7 +25,7 @@ export class FileClient {
     this.apiKey = options.apiKey;
     this.client = new HttpClient({
       baseUrl: this.host,
-      apiKey: this.apiKey,
+      apiKey: options.apiKey,
       timeout: options.timeout || 60000,
     });
   }
@@ -96,6 +96,13 @@ export class FileClient {
     return this.uploadFile(text, destinationPath, fileName);
   }
 
+  async createDirectory(path: string): Promise<Success> {
+    const response = await this.client.post<Success>('/api/file/create_directory', null, {
+      params: { path },
+    });
+    return response.data;
+  }
+
   async downloadTrajectory(conversationId: string): Promise<Blob> {
     const response = await this.client.get<Blob>(
       `/api/file/download-trajectory/${encodeURIComponent(conversationId)}`,