diff --git a/consensusj-jsonrpc/src/main/java/org/consensusj/jsonrpc/services/package-info.java b/consensusj-jsonrpc/src/main/java/org/consensusj/jsonrpc/services/package-info.java
new file mode 100644
index 000000000..490c17a85
--- /dev/null
+++ b/consensusj-jsonrpc/src/main/java/org/consensusj/jsonrpc/services/package-info.java
@@ -0,0 +1,22 @@
+/*
+ * Copyright 2014-2026 ConsensusJ Developers.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/**
+ * Simple {@link org.consensusj.jsonrpc.JsonRpcService} implementations for testing and demos.
+ */
+@NullMarked
+package org.consensusj.jsonrpc.services;
+
+import org.jspecify.annotations.NullMarked;