diff --git a/doc/source/index.rst b/doc/source/index.rst
index ba225c83c..899445187 100644
--- a/doc/source/index.rst
+++ b/doc/source/index.rst
@@ -18,10 +18,11 @@
 Welcome to Tacker Documentation
 ===============================
 
-Tacker is an OpenStack service for NFV Orchestration with a general purpose
-VNF Manager to deploy and operate Virtual Network Functions (VNFs) and
-Network Services on an NFV Platform. It is based on ETSI MANO Architectural
-Framework.
+Tacker is an OpenStack service for NFV Orchestration with a general purpose VNF
+Manager to deploy and operate Virtual Network Functions (VNFs) and Network
+Services on an NFV Platform. It is based on ETSI MANO Architectural Framework
+and provides `OpenStack’s NFV Orchestration API
+<https://docs.openstack.org/api-ref/nfv-orchestration/>`_.
 
 Contents
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