Update README

Author: tadayosi

README.md

@@ -3,7 +3,11 @@
 [![Release](https://jitpack.io/v/tadayosi/torchserve-client-java.svg)](<https://jitpack.io/#tadayosi/torchserve-client-java>)
 [![Test](https://github.com/tadayosi/torchserve-client-java/actions/workflows/test.yml/badge.svg)](https://github.com/tadayosi/torchserve-client-java/actions/workflows/test.yml)
 
-TorchServe Client for Java (TSC4J) is a Java client library for [TorchServe](https://pytorch.org/serve/index.html).
+TorchServe Client for Java (TSC4J) is a Java client library for [TorchServe](https://pytorch.org/serve/index.html). It supports the following [TorchServe REST API](https://pytorch.org/serve/rest_api.html):
+
+- [Inference API](https://pytorch.org/serve/inference_api.html)
+- [Management API](https://pytorch.org/serve/management_api.html)
+- [Metrics API](https://pytorch.org/serve/metrics_api.html)
 
 ## Install