diff --git a/.claude-plugin/marketplace.json b/.claude-plugin/marketplace.json
index 0014009..e4472fb 100644
--- a/.claude-plugin/marketplace.json
+++ b/.claude-plugin/marketplace.json
@@ -147,6 +147,17 @@
       },
       "homepage": "https://github.com/awslabs/agent-plugins"
     },
+    {
+      "name": "azure-cosmos-db-assistant",
+      "source": {
+        "source": "url",
+        "url": "https://github.com/AzureCosmosDB/cosmosdb-claude-code-plugin.git",
+        "sha": "56e6da0cae93cdee8bcfa5e624ecdd9a0a483181"
+      },
+      "description": "Expert assistant for Azure Cosmos DB — data modeling, query optimization, performance tuning, and best practices.",
+      "category": "database",
+      "homepage": "https://github.com/AzureCosmosDB/cosmosdb-claude-code-plugin"
+    },
     {
       "name": "box",
       "description": "Work with your Box content directly from Claude Code — search files, organize folders, collaborate with your team, and use Box AI to answer questions, summarize documents, and extract data without leaving your workflow.",