diff --git a/_locales/en/messages.json b/_locales/en/messages.json
index 77fb453c..904229c1 100644
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@@ -1696,5 +1696,9 @@
   "Anthropic_System_Prompt_Info": {
     "message": "You can improve Claude performance by using a System Prompt to give it a role. This technique, known as role prompting, is the most powerful way to use system prompts with Claude. The right role can turn Claude from a general assistant into your virtual domain expert.",
     "description": ""
+  },
+  "Optional_Permission_Denied_Model_Fetching": {
+    "message": "You have denied the optional permission needed to fetch models for this integration.",
+    "description": ""
   }
 }
diff --git a/pages/_lib/connection-ui.js b/pages/_lib/connection-ui.js
index 22f24500..9fb24523 100644
--- a/pages/_lib/connection-ui.js
+++ b/pages/_lib/connection-ui.js
@@ -787,6 +787,13 @@ export async function injectConnectionUI({
       apiKey: document.getElementById("anthropic_api_key").value,
       version: document.getElementById("anthropic_version").value,
     });
+    let granted = await messenger.permissions.request({ origins: ["https://*.anthropic.com/*"] });
+    if(!granted){
+        document.getElementById('anthropic_model_fetch_loading').style.display = 'none';
+        taLog.warn("Claude API web permission denied");
+        alert(browser.i18n.getMessage("Optional_Permission_Denied_Model_Fetching"));
+        return;
+    }
     anthropic.fetchModels().then((data) => {
       if(!data.ok){
         let errorDetail;