diff --git a/src/caller/mod.rs b/src/caller/mod.rs
index 8b13789..5dd76e5 100644
--- a/src/caller/mod.rs
+++ b/src/caller/mod.rs
@@ -1 +1,16 @@
+pub mod endpoints {
+    pub const ROOT: &str = "/";
 
+    pub const ADD_CONTACT: &str = "/api/v1/contact/new";
+}
+
+pub mod response {
+    pub const SUCCESSFUL: &str = "SUCCESSFUL";
+}
+
+/// Basic handler that responds with a static string
+pub async fn root() -> &'static str {
+    "Hello, World!"
+}
+
+pub mod contact {}