diff --git a/src/types.ts b/src/types.ts
index 84597a9..c8870f9 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -23,6 +23,7 @@ export enum CountryCode {
 export enum BlockedReason {
   cloudflare_challenge = 'cloudflare_challenge',
   flaresolverr_failed = 'flaresolverr_failed',
+  media_flow_proxy_auth = 'media_flow_proxy_auth',
   unknown = 'unknown',
 }
 
diff --git a/src/utils/Fetcher.test.ts b/src/utils/Fetcher.test.ts
index c8535c2..721e046 100644
--- a/src/utils/Fetcher.test.ts
+++ b/src/utils/Fetcher.test.ts
@@ -4,6 +4,7 @@ import fetchMock from 'fetch-mock';
 import { Fetcher } from './Fetcher';
 import { BlockedError, HttpError, NotFoundError, QueueIsFullError, TimeoutError, TooManyRequestsError, TooManyTimeoutsError } from '../error';
 import { createTestContext } from '../test';
+import { BlockedReason } from '../types';
 fetchMock.mockGlobal();
 
 const fetcher = new Fetcher(winston.createLogger({ transports: [new winston.transports.Console({ level: 'nope' })] }));
@@ -88,7 +89,7 @@ describe('fetch', () => {
       fail();
     } catch (error) {
       expect(error).toBeInstanceOf(BlockedError);
-      expect(error).toMatchObject({ reason: 'cloudflare_challenge' });
+      expect(error).toMatchObject({ reason: BlockedReason.cloudflare_challenge });
     }
   });
 
@@ -137,7 +138,7 @@ describe('fetch', () => {
       fail();
     } catch (error) {
       expect(error).toBeInstanceOf(BlockedError);
-      expect(error).toMatchObject({ reason: 'flaresolverr_failed' });
+      expect(error).toMatchObject({ reason: BlockedReason.flaresolverr_failed });
     }
 
     delete process.env['FLARESOLVERR_ENDPOINT'];
@@ -151,7 +152,19 @@ describe('fetch', () => {
       fail();
     } catch (error) {
       expect(error).toBeInstanceOf(BlockedError);
-      expect(error).toMatchObject({ reason: 'unknown' });
+      expect(error).toMatchObject({ reason: BlockedReason.unknown });
+    }
+  });
+
+  test('converts MediaFlow Proxy forbidden to custom BlockedError', async () => {
+    fetchMock.get('https://media-flow-proxy-forbidden-url.test/', { status: 403 });
+
+    try {
+      await fetcher.text(createTestContext({ mediaFlowProxyUrl: 'https://media-flow-proxy-forbidden-url.test/' }), new URL('https://media-flow-proxy-forbidden-url.test/'));
+      fail();
+    } catch (error) {
+      expect(error).toBeInstanceOf(BlockedError);
+      expect(error).toMatchObject({ reason: BlockedReason.media_flow_proxy_auth });
     }
   });
 
diff --git a/src/utils/Fetcher.ts b/src/utils/Fetcher.ts
index eb65646..57edf53 100644
--- a/src/utils/Fetcher.ts
+++ b/src/utils/Fetcher.ts
@@ -174,6 +174,10 @@ export class Fetcher {
     }
 
     if (httpCacheItem.status === 403) {
+      if (ctx.config.mediaFlowProxyUrl && url.href.startsWith(ctx.config.mediaFlowProxyUrl)) {
+        throw new BlockedError(BlockedReason.media_flow_proxy_auth, httpCacheItem.policy.responseHeaders());
+      }
+
       throw new BlockedError(BlockedReason.unknown, httpCacheItem.policy.responseHeaders());
     }
 
diff --git a/src/utils/StreamResolver.test.ts b/src/utils/StreamResolver.test.ts
index e7b7438..b84ef00 100644
--- a/src/utils/StreamResolver.test.ts
+++ b/src/utils/StreamResolver.test.ts
@@ -101,6 +101,17 @@ describe('resolve', () => {
               countryCode: CountryCode.de,
             },
           },
+          {
+            url: new URL('https://example.com'),
+            format: Format.unknown,
+            isExternal: true,
+            error: new BlockedError(BlockedReason.media_flow_proxy_auth, {}),
+            label: 'hoster.com',
+            sourceId: '',
+            meta: {
+              countryCode: CountryCode.de,
+            },
+          },
           {
             url: new URL('https://example.com'),
             format: Format.unknown,
diff --git a/src/utils/StreamResolver.ts b/src/utils/StreamResolver.ts
index 45b053c..504bdb5 100644
--- a/src/utils/StreamResolver.ts
+++ b/src/utils/StreamResolver.ts
@@ -1,7 +1,7 @@
 import { ContentType, Stream } from 'stremio-addon-sdk';
 import winston from 'winston';
 import bytes from 'bytes';
-import { Context, Format, UrlResult } from '../types';
+import { BlockedReason, Context, Format, UrlResult } from '../types';
 import { Source } from '../source';
 import {
   BlockedError,
@@ -167,8 +167,10 @@ export class StreamResolver {
 
   private logErrorAndReturnNiceString(ctx: Context, source: string, error: unknown): string {
     if (error instanceof BlockedError) {
-      if (error.reason === 'cloudflare_challenge') {
+      if (error.reason === BlockedReason.cloudflare_challenge) {
         this.logger.warn(`${source}: Request was blocked via Cloudflare challenge.`, ctx);
+      } else if (error.reason === BlockedReason.media_flow_proxy_auth) {
+        return '⚠️ MediaFlow Proxy authentication failed. Please set the correct password.';
       } else {
         this.logger.warn(`${source}: Request was blocked, headers: ${JSON.stringify(error.headers)}.`, ctx);
       }
diff --git a/src/utils/__snapshots__/StreamResolver.test.ts.snap b/src/utils/__snapshots__/StreamResolver.test.ts.snap
index 028ad2b..4cd5b79 100644
--- a/src/utils/__snapshots__/StreamResolver.test.ts.snap
+++ b/src/utils/__snapshots__/StreamResolver.test.ts.snap
@@ -19,6 +19,15 @@ exports[`resolve adds error info 1`] = `
       "externalUrl": "http://localhost/",
       "name": "WebStreamr 🇩🇪",
       "title": "🔗 hoster.com
+⚠️ MediaFlow Proxy authentication failed. Please set the correct password.",
+    },
+    {
+      "behaviorHints": {
+        "notWebReady": true,
+      },
+      "externalUrl": "http://localhost/",
+      "name": "WebStreamr 🇩🇪",
+      "title": "🔗 hoster.com
 ⚠️ Request was blocked.",
     },
     {
@@ -98,6 +107,15 @@ exports[`resolve adds error info 2`] = `
       "externalUrl": "https://example.com/",
       "name": "WebStreamr 🇩🇪 ⚠️ external",
       "title": "🔗 hoster.com
+⚠️ MediaFlow Proxy authentication failed. Please set the correct password.",
+    },
+    {
+      "behaviorHints": {
+        "notWebReady": true,
+      },
+      "externalUrl": "https://example.com/",
+      "name": "WebStreamr 🇩🇪 ⚠️ external",
+      "title": "🔗 hoster.com
 ⚠️ Request was blocked.",
     },
     {