diff --git a/service-catalog/discord-mods-bot/README.md b/service-catalog/discord-mods-bot/README.md
index 6deedbf..22c0155 100644
--- a/service-catalog/discord-mods-bot/README.md
+++ b/service-catalog/discord-mods-bot/README.md
@@ -5,7 +5,8 @@ is a bot used by the moderation team to manage the Rust Discord server.
 
 The bot is managed in the
 [terraform/discord-mods-bot](https://github.com/rust-lang/simpleinfra/tree/master/terraform/discord-mods-bot)
-module.
+module and uses the `discord-mods-bot` database of
+[terraform/rds-databases](https://github.com/rust-lang/simpleinfra/tree/master/terraform/rds-databases)
 
 ## Versions
 
diff --git a/service-catalog/rustc-perf/README.md b/service-catalog/rustc-perf/README.md
new file mode 100644
index 0000000..098f8cb
--- /dev/null
+++ b/service-catalog/rustc-perf/README.md
@@ -0,0 +1,18 @@
+# Rustc perf
+
+[Rustc perf] is a website that tracks the performance of
+`rustc` over time.
+
+It is deployed using [terraform/rustc-perf].
+The app is in the [rustc-perf]
+repository and it's maintained by the [wg-compiler-performance] team.
+
+It uses an ECR repository to store the Docker image and an ECS service to run it.
+
+It also uses the `shared` db of [rds-databases] and the `rustc-perf` S3 bucket.
+
+[Rustc perf]: https://perf.rust-lang.org/
+[rustc-perf]: https://github.com/rust-lang/rustc-perf
+[terraform/rustc-perf]: https://github.com/rust-lang/simpleinfra/tree/master/terraform/rustc-perf
+[wg-compiler-performance]: https://github.com/orgs/rust-lang/teams/wg-compiler-performance
+[rds-databases]: https://github.com/rust-lang/simpleinfra/tree/master/terraform/rds-databases