diff --git a/lib/decentralised_book_index/metadata/author_role.ex b/lib/decentralised_book_index/metadata/author_role.ex
index f0ffb5e..3e9beb2 100644
--- a/lib/decentralised_book_index/metadata/author_role.ex
+++ b/lib/decentralised_book_index/metadata/author_role.ex
@@ -2,10 +2,15 @@ defmodule DecentralisedBookIndex.Metadata.AuthorRole do
   use Ash.Resource,
     otp_app: :decentralised_book_index,
     domain: DecentralisedBookIndex.Metadata,
-    data_layer: AshPostgres.DataLayer
+    data_layer: AshPostgres.DataLayer,
+    extensions: [AshJsonApi.Resource]
 
   alias DecentralisedBookIndex.Metadata
 
+  json_api do
+    type "author_role"
+  end
+
   postgres do
     table "author_role"
     repo DecentralisedBookIndex.Repo
diff --git a/lib/decentralised_book_index/metadata/book_id.ex b/lib/decentralised_book_index/metadata/book_id.ex
index 90e0a1a..8d9c165 100644
--- a/lib/decentralised_book_index/metadata/book_id.ex
+++ b/lib/decentralised_book_index/metadata/book_id.ex
@@ -2,10 +2,15 @@ defmodule DecentralisedBookIndex.Metadata.BookId do
   use Ash.Resource,
     otp_app: :decentralised_book_index,
     domain: DecentralisedBookIndex.Metadata,
-    data_layer: AshPostgres.DataLayer
+    data_layer: AshPostgres.DataLayer,
+    extensions: [AshJsonApi.Resource]
 
   alias DecentralisedBookIndex.Metadata
 
+  json_api do
+    type "book_id"
+  end
+
   postgres do
     table "book_ids"
     repo DecentralisedBookIndex.Repo