diff --git a/API/leaderboard.md b/API/leaderboard.md
index 3ffb251..b2a33e2 100644
--- a/API/leaderboard.md
+++ b/API/leaderboard.md
@@ -26,7 +26,7 @@ Note: If username is not already added to leaderboard then it would be added in
 
 ## Optional Paramaters
 
-- **avatar** - This should be only used if a new user needs to be added to the leaderboard and wants a custom avatar, should be just the file name from `https://commons.wikimedia.org/wiki/File:` For example: **User-avatar_Dark.png** If no **avatar** is supplied then default one would be used i.e. **Gnome-stock_person.svg**
+- **avatar** - This should be only used if a new user needs to be added to the leaderboard and wants a custom avatar, should be complete Image URL for example `https://upload.wikimedia.org/wikipedia/commons/thumb/0/0a/Gnome-stock_person.svg/200px-Gnome-stock_person.svg.png` If no **avatar** is supplied then default one would be used i.e. **https://upload.wikimedia.org/wikipedia/commons/thumb/0/0a/Gnome-stock_person.svg/200px-Gnome-stock_person.svg.png**
 
 - **limit** - This is the limit for the number of results and should be passed along with offset, for example **5**
 
@@ -46,56 +46,56 @@ curl --location --request GET 'https://tools.wmflabs.org/commons-android-app/too
     "username": "Syced",
     "category_count": 462,
     "limit": null,
-    "avatar": "Gnome-stock_person.svg",
+    "avatar": "https://upload.wikimedia.org/wikipedia/commons/thumb/0/0a/Gnome-stock_person.svg/200px-Gnome-stock_person.svg.png",
     "offset": null,
     "duration": "all_time",
     "leaderboard_list": [
         {
             "username": "Fæ",
             "category_count": 107147,
-            "avatar": "Gnome-stock_person.svg",
+            "avatar": "https://upload.wikimedia.org/wikipedia/commons/thumb/0/0a/Gnome-stock_person.svg/200px-Gnome-stock_person.svg.png",
             "rank": 1
         },
         {
             "username": "JAn Dudík",
             "category_count": 912,
-            "avatar": "Gnome-stock_person.svg",
+            "avatar": "https://upload.wikimedia.org/wikipedia/commons/thumb/0/0a/Gnome-stock_person.svg/200px-Gnome-stock_person.svg.png",
             "rank": 2
         },
         {
             "username": "Vojtěch Dostál",
             "category_count": 749,
-            "avatar": "Gnome-stock_person.svg",
+            "avatar": "https://upload.wikimedia.org/wikipedia/commons/thumb/0/0a/Gnome-stock_person.svg/200px-Gnome-stock_person.svg.png",
             "rank": 3
         },
         {
             "username": "Syced",
             "category_count": 462,
-            "avatar": "Gnome-stock_person.svg",
+            "avatar": "https://upload.wikimedia.org/wikipedia/commons/thumb/0/0a/Gnome-stock_person.svg/200px-Gnome-stock_person.svg.png",
             "rank": 4
         },
         {
             "username": "Misaochan",
             "category_count": 101,
-            "avatar": "Gnome-stock_person.svg",
+            "avatar": "https://upload.wikimedia.org/wikipedia/commons/thumb/0/0a/Gnome-stock_person.svg/200px-Gnome-stock_person.svg.png",
             "rank": 5
         },
         {
             "username": "Kookaburra 81",
             "category_count": 41,
-            "avatar": "Gnome-stock_person.svg",
+            "avatar": "https://upload.wikimedia.org/wikipedia/commons/thumb/0/0a/Gnome-stock_person.svg/200px-Gnome-stock_person.svg.png",
             "rank": 6
         },
         {
             "username": "Madhurgupta10",
             "category_count": 1,
-            "avatar": "Gnome-stock_person.svg",
+            "avatar": "https://upload.wikimedia.org/wikipedia/commons/thumb/0/0a/Gnome-stock_person.svg/200px-Gnome-stock_person.svg.png",
             "rank": 7
         },
         {
             "username": "Macgills2",
             "category_count": 1,
-            "avatar": "Gnome-stock_person.svg",
+            "avatar": "https://upload.wikimedia.org/wikipedia/commons/thumb/0/0a/Gnome-stock_person.svg/200px-Gnome-stock_person.svg.png",
             "rank": 8
         }
     ],
diff --git a/API/update_avatar.md b/API/update_avatar.md
new file mode 100644
index 0000000..43aeaeb
--- /dev/null
+++ b/API/update_avatar.md
@@ -0,0 +1,47 @@
+# Update Leaderboard Avatar API
+
+This API is used to check if a username is valid or not.
+
+## Base URL
+`https://tools.wmflabs.org/commons-android-app/tool-commons-android-app`
+
+## Endpoint
+`/update_avatar.py`
+
+## Request Type
+`GET`
+
+## Response Type
+`JSON`
+
+## Required Parameters
+
+- **user** - This is username of the user, for example **Syced** (if username has **whitespaces** then replace them with `_` )
+
+- **avatar** - This is url of the avatar to set, for example **https://upload.wikimedia.org/wikipedia/commons/thumb/0/0a/Gnome-stock_person.svg/200px-Gnome-stock_person.svg.png**
+
+
+## Example Request
+
+```
+curl --location --request GET 'https://commons-android-app.toolforge.org/tool-commons-android-app/update_avatar.py?user=Syced&avatar=https://upload.wikimedia.org/wikipedia/commons/thumb/0/0a/Gnome-stock_person.svg/200px-Gnome-stock_person.svg.png'
+```
+
+## Example Responses
+
+```
+{
+    "status": "200",
+    "message": "Avatar Updated",
+    "user": "Syced"
+}
+```
+
+**Note: Returns error if params are invalid**
+```
+{
+    "status": "400",
+    "message": "Invalid Parameters",
+    "user": null
+}
+```
\ No newline at end of file