diff --git a/src/c2se/frontend/api/game.rs b/src/c2se/frontend/api/game.rs
new file mode 100644
index 0000000..df14503
--- /dev/null
+++ b/src/c2se/frontend/api/game.rs
@@ -0,0 +1,3 @@
+const SUBJECT: &str = "bet.beteran.c2se.frontend.api.game";
+
+pub const SUBJECT_LIST_GAMES: &str = const_format::concatcp!(SUBJECT, ".ListGames");
diff --git a/src/c2se/frontend/api/mod.rs b/src/c2se/frontend/api/mod.rs
new file mode 100644
index 0000000..fd2b58f
--- /dev/null
+++ b/src/c2se/frontend/api/mod.rs
@@ -0,0 +1,2 @@
+pub mod game;
+pub mod vendor;
diff --git a/src/c2se/frontend/api/vendor.rs b/src/c2se/frontend/api/vendor.rs
new file mode 100644
index 0000000..e32eda9
--- /dev/null
+++ b/src/c2se/frontend/api/vendor.rs
@@ -0,0 +1,3 @@
+const SUBJECT: &str = "bet.beteran.c2se.frontend.api.vendor";
+
+pub const SUBJECT_LIST_VENDORS: &str = const_format::concatcp!(SUBJECT, ".ListVendors");
diff --git a/src/c2se/frontend/mod.rs b/src/c2se/frontend/mod.rs
index 9d6221e..771e86d 100644
--- a/src/c2se/frontend/mod.rs
+++ b/src/c2se/frontend/mod.rs
@@ -1,3 +1,4 @@
+pub mod api;
 pub mod bank;
 pub mod identity;
 // pub mod member_bank_account;