Add amplitude plugin

.claude-plugin/marketplace.json

@@ -73,6 +73,17 @@
       },
       "homepage": "https://github.com/awslabs/agent-plugins"
     },
+    {
+      "name": "amplitude",
+      "source": {
+        "source": "url",
+        "url": "https://github.com/amplitude/mcp-marketplace.git",
+        "sha": "be54ccb66b10593721dd3a31e47b2db20ea02d2f"
+      },
+      "description": "Use Amplitude as an expert analyst — instrument Amplitude, discover product opportunities, analyze charts, create dashboards, manage experiments, and understand users and accounts.",
+      "category": "monitoring",
+      "homepage": "https://github.com/amplitude/mcp-marketplace"
+    },
     {
       "name": "asana",
       "description": "Asana project management integration. Create and manage tasks, search projects, update assignments, track progress, and integrate your development workflow with Asana's work management platform.",