diff --git a/litellm/proxy/anthropic_endpoints/claude_code_endpoints/claude_code_marketplace.py b/litellm/proxy/anthropic_endpoints/claude_code_endpoints/claude_code_marketplace.py
index 871ca31eb42..c03339adf29 100644
--- a/litellm/proxy/anthropic_endpoints/claude_code_endpoints/claude_code_marketplace.py
+++ b/litellm/proxy/anthropic_endpoints/claude_code_endpoints/claude_code_marketplace.py
@@ -21,7 +21,7 @@ import json
 import re
 from collections.abc import Mapping, Sequence
 from datetime import datetime, timezone
-from typing import Annotated, Final, Protocol, TypedDict, cast
+from typing import Annotated, Final, Protocol, TypedDict
 from urllib.parse import urlsplit
 
 from fastapi import APIRouter, Depends, HTTPException, Request
@@ -73,6 +73,11 @@ class _MarketplaceEntry(TypedDict, total=False):
     installationPreference: str
 
 
+def _get_manifest_string(manifest: Mapping[str, object], key: str) -> str | None:
+    value: Final = manifest.get(key)
+    return value if isinstance(value, str) else None
+
+
 async def _get_prisma_client() -> object:
     """Get the prisma client from proxy_server."""
     from litellm.proxy.proxy_server import prisma_client
@@ -154,8 +159,9 @@ async def get_marketplace(request: Request, key: str | None = None):
                 entry["keywords"] = manifest["keywords"]
             if "category" in manifest:
                 entry["category"] = manifest["category"]
-            if "installation_preference" in manifest:
-                entry["installationPreference"] = cast(str, manifest["installation_preference"])
+            installation_preference: Final[str | None] = _get_manifest_string(manifest, "installation_preference")
+            if installation_preference is not None:
+                entry["installationPreference"] = installation_preference
 
             plugin_list.append(entry)
 
@@ -439,10 +445,7 @@ async def list_plugins(
                     category=manifest.get("category"),
                     domain=manifest.get("domain"),
                     namespace=manifest.get("namespace"),
-                    installation_preference=cast(
-                        str | None,
-                        cast(Mapping[str, object], manifest).get("installation_preference"),
-                    ),
+                    installation_preference=_get_manifest_string(manifest, "installation_preference"),
                     enabled=p.enabled,
                     created_at=p.created_at.isoformat() if p.created_at else None,
                     updated_at=p.updated_at.isoformat() if p.updated_at else None,
diff --git a/ui/litellm-dashboard/src/lib/http/schema.d.ts b/ui/litellm-dashboard/src/lib/http/schema.d.ts
index 17ec8367324..0b44a51040f 100644
--- a/ui/litellm-dashboard/src/lib/http/schema.d.ts
+++ b/ui/litellm-dashboard/src/lib/http/schema.d.ts
@@ -2250,6 +2250,7 @@ export interface paths {
          *         - homepage: Plugin homepage URL (optional)
          *         - keywords: Search keywords (optional)
          *         - category: Plugin category (optional)
+         *         - installation_preference: Marketplace installationPreference, e.g. 'auto_install' (optional)
          *
          *     Returns:
          *         Registration status (action is always "created") and plugin information.
@@ -2316,6 +2317,7 @@ export interface paths {
          *         - homepage: Plugin homepage URL (optional)
          *         - keywords: Search keywords (optional)
          *         - category: Plugin category (optional)
+         *         - installation_preference: Marketplace installationPreference, e.g. 'auto_install' (optional)
          *
          *     Returns:
          *         Update status (action is always "updated") and plugin information.
@@ -34381,6 +34383,8 @@ export interface components {
             homepage?: string | null;
             /** Id */
             id: string;
+            /** Installation Preference */
+            installation_preference?: string | null;
             /** Keywords */
             keywords?: string[] | null;
             /** Name */
@@ -35699,6 +35703,11 @@ export interface components {
              * @description Plugin homepage URL
              */
             homepage?: string | null;
+            /**
+             * Installation Preference
+             * @description Claude Code marketplace installationPreference for this plugin (e.g. 'auto_install')
+             */
+            installation_preference?: string | null;
             /**
              * Keywords
              * @description Search keywords
@@ -39079,6 +39088,11 @@ export interface components {
              * @description Plugin homepage URL
              */
             homepage?: string | null;
+            /**
+             * Installation Preference
+             * @description Claude Code marketplace installationPreference for this plugin (e.g. 'auto_install')
+             */
+            installation_preference?: string | null;
             /**
              * Keywords
              * @description Search keywords