diff --git a/app/src/core/backend.ts b/app/src/core/backend.ts
index 14932a22..b59a7fc9 100644
--- a/app/src/core/backend.ts
+++ b/app/src/core/backend.ts
@@ -24,6 +24,7 @@ export interface User {
 
 export class Backend extends EventEmitter {
     public user: User | null = null;
+    public services: string[] = [];
     private checkedSession = false;
 
     private sessionInterval = new AsyncLoop(() => this.getSession(), 1000 * 30);
@@ -70,8 +71,10 @@ export class Backend extends EventEmitter {
                 avatar: session.picture,
                 services: session.services,
             };
+            this.services = session.services || [];
         } else {
             this.user = null;
+            this.services = session?.services || [];
         }
 
         this.checkedSession = true;
diff --git a/app/src/core/chat/openai.ts b/app/src/core/chat/openai.ts
index 8b63def7..f107c537 100644
--- a/app/src/core/chat/openai.ts
+++ b/app/src/core/chat/openai.ts
@@ -7,7 +7,7 @@ import { backend } from "../backend";
 export const defaultModel = 'gpt-3.5-turbo';
 
 export function isProxySupported() {
-    return !!backend.current?.user?.services?.includes('openai');
+    return !!backend.current?.services?.includes('openai');
 }
 
 function shouldUseProxy(apiKey: string | undefined | null) {
@@ -141,5 +141,5 @@ export async function createStreamingChatCompletion(messages: OpenAIMessage[], p
 
 export const maxTokensByModel = {
     "chatgpt-3.5-turbo": 2048,
-    "gpt-4": 8096,
+    "gpt-4": 8192,
 }
\ No newline at end of file
diff --git a/app/src/tts-plugins/elevenlabs.tsx b/app/src/tts-plugins/elevenlabs.tsx
index b9c8daf7..e9648551 100644
--- a/app/src/tts-plugins/elevenlabs.tsx
+++ b/app/src/tts-plugins/elevenlabs.tsx
@@ -6,7 +6,7 @@ import { defaultElevenLabsVoiceID, defaultVoiceList } from "./elevenlabs-default
 import { backend } from "../core/backend";
 
 function isProxySupported() {
-    return !!backend.current?.user?.services?.includes('elevenlabs');
+    return !!backend.current?.services?.includes('elevenlabs');
 }
 
 function shouldUseProxy(apiKey: string | undefined | null) {
diff --git a/server/src/config.ts b/server/src/config.ts
index f1b69d27..79abf2fc 100644
--- a/server/src/config.ts
+++ b/server/src/config.ts
@@ -18,6 +18,7 @@ export interface Config {
             // When provided, signed in users will be able to access OpenAI through the server
             // without needing their own API key.
             apiKey?: string;
+            loginRequired?: boolean;
         };
 
         elevenlabs?: {
@@ -25,9 +26,10 @@ export interface Config {
             // When provided, signed in users will be able to access ElevenLabs through the server
             // without needing their own API key.
             apiKey?: string;
+            loginRequired?: boolean;
         };
     };
-    
+
     /*
     Optional configuration for enabling Transport Layer Security (TLS) in the server.
     Requires specifying the file paths for the key and cert files. Includes:
@@ -102,9 +104,18 @@ if (!fs.existsSync('./data')) {
     fs.mkdirSync('./data');
 }
 
-const filename = process.env.CHATWITHGPT_CONFIG_FILENAME
-    ? path.resolve(process.env.CHATWITHGPT_CONFIG_FILENAME) 
-    : path.resolve(__dirname, '../data/config.yaml');
+let filename = process.env.CHATWITHGPT_CONFIG_FILENAME as string;
+
+// assume config.yaml if no filename is provided:
+if (!filename) {
+    filename = path.resolve(__dirname, '../data/config.yaml')
+    
+    // try config.yml if config.yaml doesn't exist:
+    const fallbackFilename = path.resolve(__dirname, '../data/config.yml');
+    if (!fs.existsSync(filename) && fs.existsSync(fallbackFilename)) {
+        filename = fallbackFilename;
+    }
+}
 
 if (fs.existsSync(filename)) {
     config = {
@@ -132,6 +143,7 @@ if (process.argv.includes('--self-signed')) {
 }
 
 if (config.publicSiteURL) {
+    // remove trailing slash:
     config.publicSiteURL = config.publicSiteURL.replace(/\/$/, '');
 }
 
diff --git a/server/src/endpoints/service-proxies/elevenlabs/text-to-speech.ts b/server/src/endpoints/service-proxies/elevenlabs/text-to-speech.ts
index 8f35aef4..92d18961 100644
--- a/server/src/endpoints/service-proxies/elevenlabs/text-to-speech.ts
+++ b/server/src/endpoints/service-proxies/elevenlabs/text-to-speech.ts
@@ -23,6 +23,6 @@ export default class ElevenLabsTTSProxyRequestHandler extends RequestHandler {
     }
 
     public isProtected() {
-        return true;
+        return config.services?.elevenlabs?.loginRequired ?? true;
     }
 }
\ No newline at end of file
diff --git a/server/src/endpoints/service-proxies/elevenlabs/voices.ts b/server/src/endpoints/service-proxies/elevenlabs/voices.ts
index d9f2a2d3..eebf9077 100644
--- a/server/src/endpoints/service-proxies/elevenlabs/voices.ts
+++ b/server/src/endpoints/service-proxies/elevenlabs/voices.ts
@@ -2,6 +2,7 @@ import express from 'express';
 import RequestHandler from "../../base";
 import axios from 'axios';
 import { endpoint, apiKey } from './text-to-speech';
+import { config } from '../../../config';
 
 export default class ElevenLabsVoicesProxyRequestHandler extends RequestHandler {
     async handler(req: express.Request, res: express.Response) {
@@ -16,6 +17,6 @@ export default class ElevenLabsVoicesProxyRequestHandler extends RequestHandler
     }
 
     public isProtected() {
-        return true;
+        return config.services?.elevenlabs?.loginRequired ?? true;
     }
 }
\ No newline at end of file
diff --git a/server/src/endpoints/service-proxies/openai/index.ts b/server/src/endpoints/service-proxies/openai/index.ts
index 5c1eca1e..a263f08e 100644
--- a/server/src/endpoints/service-proxies/openai/index.ts
+++ b/server/src/endpoints/service-proxies/openai/index.ts
@@ -17,6 +17,6 @@ export default class OpenAIProxyRequestHandler extends RequestHandler {
     }
 
     public isProtected() {
-        return true;
+        return config.services?.openai?.loginRequired ?? true;
     }
 }
\ No newline at end of file
diff --git a/server/src/endpoints/session.ts b/server/src/endpoints/session.ts
index 23ea0c18..97acb0e9 100644
--- a/server/src/endpoints/session.ts
+++ b/server/src/endpoints/session.ts
@@ -7,7 +7,12 @@ export default class SessionRequestHandler extends RequestHandler {
         const request = req as any;
 
         const availableServiceNames = Object.keys(config.services || {})
-            .filter(key => (config.services as any)?.[key]?.apiKey);
+            .filter(key => {
+                const serviceConfig = (config.services as any)?.[key];
+                const apiKey = serviceConfig?.apiKey;
+                const loginRequired = serviceConfig?.loginRequired ?? true;
+                return apiKey && (!loginRequired || request.isAuthenticated());
+            });
 
         if (request.oidc) {
             const user = request.oidc.user;
@@ -40,6 +45,7 @@ export default class SessionRequestHandler extends RequestHandler {
         res.json({
             authProvider: this.context.authProvider,
             authenticated: false,
+            services: availableServiceNames,
         });
     }
 }
\ No newline at end of file