diff --git a/README.md b/README.md
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@@ -9,3 +9,10 @@ SPDX-License-Identifier: Apache-2.0
 Client-side API for fetching keys from - and publishing keys to - Verifying OpenPGP Key Servers (VKS).
 
 An example implementation of a Verifying Key Server is [Hagrid](https://gitlab.com/hagrid-keyserver/hagrid), which is running https://keys.openpgp.org.
+
+## Modules
+
+This repository contains the following modules:
+
+* [vks-java](/vks-java): Client-side Java API for communicating with VKS servers
+* [vks-java-cli](/vks-java-cli): CLI frontend for `vks-java`