diff --git a/src/constants/locales.ts b/src/constants/locales.ts
index 716c41d9..5b277e70 100644
--- a/src/constants/locales.ts
+++ b/src/constants/locales.ts
@@ -9,6 +9,6 @@ export const LOCALES = [
     { code: 'es', key: 'spanish' },
     { code: 'hr', key: 'croatian' },
     { code: 'zh-CN', key: 'chinese' },
-    { code: 'hi', key: 'hindi' }
+    { code: 'hi', key: 'hindi' },
     { code: 'sr', key: 'serbian' } 
 ];
\ No newline at end of file
diff --git a/src/screens/settings/PlaybackSettingsScreen.tsx b/src/screens/settings/PlaybackSettingsScreen.tsx
index fb549e1e..c3559e3c 100644
--- a/src/screens/settings/PlaybackSettingsScreen.tsx
+++ b/src/screens/settings/PlaybackSettingsScreen.tsx
@@ -1,5 +1,5 @@
 import React, { useState, useCallback, useMemo, useRef, useEffect } from 'react';
-import { View, StyleSheet, ScrollView, StatusBar, Platform, Text, TouchableOpacity, Dimensions, TextInput } from 'react-native';
+import { View, StyleSheet, ScrollView, StatusBar, Platform, Text, TouchableOpacity, Dimensions, TextInput, ActivityIndicator } from 'react-native';
 import { useNavigation, useFocusEffect } from '@react-navigation/native';
 import { NavigationProp } from '@react-navigation/native';
 import { useSafeAreaInsets } from 'react-native-safe-area-context';
@@ -14,6 +14,7 @@ import { BottomSheetModal, BottomSheetScrollView, BottomSheetBackdrop } from '@g
 import { useTranslation } from 'react-i18next';
 import { SvgXml } from 'react-native-svg';
 import { toastService } from '../../services/toastService';
+import { introService } from '../../services/introService';
 
 const { width } = Dimensions.get('window');
 
@@ -79,14 +80,40 @@ export const PlaybackSettingsContent: React.FC<PlaybackSettingsContentProps> = (
 
     const [introDbLogoXml, setIntroDbLogoXml] = useState<string | null>(null);
     const [apiKeyInput, setApiKeyInput] = useState(settings?.introDbApiKey || '');
+    const [isVerifyingKey, setIsVerifyingKey] = useState(false);
+
+    const isMounted = useRef(true);
+
+    useEffect(() => {
+        isMounted.current = true;
+        return () => {
+            isMounted.current = false;
+        };
+    }, []);
 
     useEffect(() => {
         setApiKeyInput(settings?.introDbApiKey || '');
     }, [settings?.introDbApiKey]);
 
-    const handleApiKeySubmit = () => {
-        updateSetting('introDbApiKey', apiKeyInput);
-        toastService.success(t('settings.items.api_key_saved', { defaultValue: 'API Key Saved' }));
+    const handleApiKeySubmit = async () => {
+        if (!apiKeyInput.trim()) {
+            updateSetting('introDbApiKey', '');
+            toastService.success(t('settings.items.api_key_cleared', { defaultValue: 'API Key Cleared' }));
+            return;
+        }
+
+        setIsVerifyingKey(true);
+        const isValid = await introService.verifyApiKey(apiKeyInput);
+        
+        if (!isMounted.current) return;
+        setIsVerifyingKey(false);
+
+        if (isValid) {
+            updateSetting('introDbApiKey', apiKeyInput);
+            toastService.success(t('settings.items.api_key_saved', { defaultValue: 'API Key Saved' }));
+        } else {
+            toastService.error(t('settings.items.api_key_invalid', { defaultValue: 'Invalid API Key' }));
+        }
     };
 
     useEffect(() => {
@@ -271,8 +298,13 @@ export const PlaybackSettingsContent: React.FC<PlaybackSettingsContentProps> = (
                             <TouchableOpacity
                                 style={styles.confirmButton}
                                 onPress={handleApiKeySubmit}
+                                disabled={isVerifyingKey}
                             >
-                                <MaterialIcons name="check" size={24} color="black" />
+                                {isVerifyingKey ? (
+                                    <ActivityIndicator size="small" color="black" />
+                                ) : (
+                                    <MaterialIcons name="check" size={24} color="black" />
+                                )}
                             </TouchableOpacity>
                         </View>
                     </View>
diff --git a/src/services/introService.ts b/src/services/introService.ts
index 99772144..de9a1c78 100644
--- a/src/services/introService.ts
+++ b/src/services/introService.ts
@@ -187,6 +187,40 @@ async function fetchFromIntroDb(imdbId: string, season: number, episode: number)
     }
 }
 
+/**
+ * Verifies an IntroDB API key
+ */
+export async function verifyApiKey(apiKey: string): Promise<boolean> {
+    try {
+        if (!apiKey) return false;
+
+        const response = await axios.post(`${INTRODB_API_URL}/submit`, {}, {
+            headers: {
+                'Authorization': `Bearer ${apiKey}`,
+                'Content-Type': 'application/json'
+            },
+            timeout: 5000,
+            validateStatus: (status) => true // Handle status codes manually
+        });
+
+        // 400 means Auth passed but payload was empty/invalid -> Key is Valid
+        if (response.status === 400) return true;
+        
+        // 200/201 would also mean valid (though unexpected with empty body)
+        if (response.status === 200 || response.status === 201) return true;
+
+        // Explicitly handle auth failures
+        if (response.status === 401 || response.status === 403) return false;
+
+        // Log warning for unexpected states (500, 429, etc.) but fail safe
+        logger.warn(`[IntroService] Verification received unexpected status: ${response.status}`);
+        return false;
+    } catch (error: any) {
+        logger.log('[IntroService] API Key verification failed:', error.message);
+        return false;
+    }
+}
+
 /**
  * Submits an intro timestamp to IntroDB
  */
@@ -305,7 +339,8 @@ export async function getIntroTimestamps(
 export const introService = {
     getIntroTimestamps,
     getSkipTimes,
-    submitIntro
+    submitIntro,
+    verifyApiKey
 };
 
 export default introService;