diff --git a/contents/tools.js b/contents/tools.js
index 0219459c..f8761baf 100644
--- a/contents/tools.js
+++ b/contents/tools.js
@@ -17,6 +17,13 @@ import {
 } from '../components/tool-logos'
 
 const tools = [
+  {
+    id: 'oae-efficiency',
+    logo: <OAEEfficiency />,
+    color: 'secondary',
+    summary: 'Mapping the efficiency of ocean alkalinity enhancement.',
+    title: 'OAE Efficiency',
+  },
   {
     id: 'offsets-db',
     logo: <OffsetsDB />,