diff --git a/crates/ptth_relay/README.md b/crates/ptth_relay/README.md
new file mode 100644
index 0000000..0907c7e
--- /dev/null
+++ b/crates/ptth_relay/README.md
@@ -0,0 +1,5 @@
+# PTTH Relay
+
+The PTTH relay accepts incoming connections from PTTH servers, and
+acts as a reverse proxy, forwarding incoming requests from HTTP clients
+to PTTH servers.
diff --git a/crates/ptth_relay/src/lib.rs b/crates/ptth_relay/src/lib.rs
index 7c265ce..c6921d7 100644
--- a/crates/ptth_relay/src/lib.rs
+++ b/crates/ptth_relay/src/lib.rs
@@ -1,7 +1,8 @@
 //! # PTTH Relay
 //! 
-//! ptth_relay runs on a public-facing web server and accepts
-//! incoming HTTP connections from both HTTP clients and PTTH servers.
+//! The PTTH relay accepts incoming connections from PTTH servers, and
+//! acts as a reverse proxy, forwarding incoming requests from HTTP clients
+//! to PTTH servers.
 
 #![warn (clippy::pedantic)]