diff --git a/packages/domains/src/api/file.ts b/packages/domains/src/api/file.ts
index b5c16aec..0a419d78 100644
--- a/packages/domains/src/api/file.ts
+++ b/packages/domains/src/api/file.ts
@@ -27,13 +27,40 @@ export const FileApiDefinition = {
   },
 
   /**
-   * 上传分块文件
+   * 合并分块文件
    */
   mergeChunk: {
     method: 'post' as const,
     server: 'merge/chunk' as const,
     client: () => '/file/merge/chunk',
   },
+
+  /**
+   * OSS 签名
+   */
+  ossSign: {
+    method: 'post' as const,
+    server: 'oss/sign' as const,
+    client: () => '/file/oss/sign',
+  },
+
+  /**
+   * OSS 分块上传
+   */
+  ossChunk: {
+    method: 'post' as const,
+    server: 'oss/chunk' as const,
+    client: () => '/file/oss/chunk',
+  },
+
+  /**
+   * OSS 合并分块
+   */
+  ossMerge: {
+    method: 'post' as const,
+    server: 'oss/merge' as const,
+    client: () => '/file/oss/merge',
+  },
 };
 
 export const FILE_CHUNK_SIZE = 2 * 1024 * 1024;