diff --git a/API.md b/API.md
index 0730d2fcc..4d15bc941 100644
--- a/API.md
+++ b/API.md
@@ -34,6 +34,9 @@
     * [Execute SQL query](#Execute-SQL-query)
 * [Templates](#Templates)
     * [Render a template](#Render-a-template)
+* [File](#File)
+    * [Get File](#Get-file)
+    * [Put File](#Put-file)
 * [Export](#Export)
     * [Export Markdown](#Export-Markdown)
 * [System](#System)
@@ -50,7 +53,8 @@
 
 * Endpoint: `http://127.0.0.1:6806`
 * Both are POST methods
-* An interface with parameters is required, the parameter is a JSON string, placed in the body, and the header Content-Type is `application/json`
+* An interface with parameters is required, the parameter is a JSON string, placed in the body, and the header
+  Content-Type is `application/json`
 * Return value
 
    ````json
@@ -61,9 +65,9 @@
    }
    ````
 
-  * `code`: non-zero for exceptions
-  * `msg`: an empty string under normal circumstances, an error text will be returned under abnormal conditions
-  * `data`: may be `{}`, `[]` or `NULL`, depending on the interface
+    * `code`: non-zero for exceptions
+    * `msg`: an empty string under normal circumstances, an error text will be returned under abnormal conditions
+    * `data`: may be `{}`, `[]` or `NULL`, depending on the interface
 
 ### Authentication
 
@@ -305,7 +309,8 @@ View API token in <kbd>Settings - About</kbd>, request header: `Authorization: T
   ```
 
     * `notebook`: Notebook ID
-    * `path`: Document path, which needs to start with / and separate levels with / (path here corresponds to the database hpath field)
+    * `path`: Document path, which needs to start with / and separate levels with / (path here corresponds to the
+      database hpath field)
     * `markdown`: GFM Markdown content
 * Return value
 
@@ -318,7 +323,8 @@ View API token in <kbd>Settings - About</kbd>, request header: `Authorization: T
   ```
 
     * `data`: Created document ID
-    * If you use the same `path` to call this interface repeatedly, the existing document will not be overwritten, but a new document ending with a random number will be created
+    * If you use the same `path` to call this interface repeatedly, the existing document will not be overwritten, but a
+      new document ending with a random number will be created
 
 ### Rename a document
 
@@ -432,7 +438,7 @@ View API token in <kbd>Settings - About</kbd>, request header: `Authorization: T
   }
   ```
 
-  * `id`：Block ID
+    * `id`：Block ID
 * Return value
 
   ```json
@@ -474,7 +480,9 @@ View API token in <kbd>Settings - About</kbd>, request header: `Authorization: T
   ```
 
     * `errFiles`: List of filenames with errors in upload processing
-    * `succMap`: For successfully processed files, the key is the file name when uploading, and the value is assets/foo-id.png, which is used to replace the asset link address in the existing Markdown content with the uploaded address
+    * `succMap`: For successfully processed files, the key is the file name when uploading, and the value is
+      assets/foo-id.png, which is used to replace the asset link address in the existing Markdown content with the
+      uploaded address
 
 ## Blocks
 
@@ -780,12 +788,11 @@ View API token in <kbd>Settings - About</kbd>, request header: `Authorization: T
 * `/api/file/getFile`
 * Parameters
 
-   ``json
-   {
-     "path": "/data/20210808180117-6v0mkxr/20200923234011-ieuun1p.sy"
-   }
-   ``
-  * `path`: the file path under the workspace path
+  ``json {
+  "path": "/data/20210808180117-6v0mkxr/20200923234011-ieuun1p.sy"
+  }
+  ``
+    * `path`: the file path under the workspace path
 * Return value
 
   File content
@@ -795,10 +802,10 @@ View API token in <kbd>Settings - About</kbd>, request header: `Authorization: T
 * `/api/file/putFile`
 * The parameter is an HTTP Multipart form
 
-  * `path`: the file path under the workspace path
-  * `isDir`: whether to create a folder, when `true` only create a folder, ignore `file`
-  * `modTime`: last access and modification time, Unix time
-  * `file`: the uploaded file
+    * `path`: the file path under the workspace path
+    * `isDir`: whether to create a folder, when `true` only create a folder, ignore `file`
+    * `modTime`: last access and modification time, Unix time
+    * `file`: the uploaded file
 * return value
 
    ```json