diff --git a/src/calibre/srv/code.py b/src/calibre/srv/code.py
index 4e6cffe1c1..5320353cbe 100644
--- a/src/calibre/srv/code.py
+++ b/src/calibre/srv/code.py
@@ -236,7 +236,6 @@ def book_metadata(ctx, rd, book_id):
     data = book_as_json(db, book_id)
     if data is None:
         notfound()
-    data['id'] = book_id
     return data
 
 @endpoint('/interface-data/tag-browser')
diff --git a/src/calibre/srv/metadata.py b/src/calibre/srv/metadata.py
index 8f9370d8a0..3da5acab89 100644
--- a/src/calibre/srv/metadata.py
+++ b/src/calibre/srv/metadata.py
@@ -21,7 +21,7 @@ from calibre.utils.file_type_icons import EXT_MAP
 from calibre.utils.icu import collation_order
 from calibre.library.field_metadata import category_icon_map
 
-IGNORED_FIELDS = frozenset('cover ondevice path marked id au_map'.split())
+IGNORED_FIELDS = frozenset('cover ondevice path marked au_map'.split())
 
 def encode_datetime(dateval):
     if dateval is None: