feat: add openai_base_url config for LiteLLM/OpenAI-compatible proxy support

backend/package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "priceghost-backend",
-  "version": "1.0.5",
+  "version": "1.0.6",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "priceghost-backend",
-      "version": "1.0.5",
+      "version": "1.0.6",
       "dependencies": {
         "@anthropic-ai/sdk": "^0.24.0",
         "@google/generative-ai": "^0.24.1",

backend/src/models/index.ts

@@ -48,6 +48,7 @@ export interface AISettings {
   anthropic_model: string | null;
   openai_api_key: string | null;
   openai_model: string | null;
+  openai_base_url: string | null;
   ollama_base_url: string | null;
   ollama_model: string | null;
   gemini_api_key: string | null;
@@ -244,11 +245,11 @@ export const userQueries = {
     return (result.rowCount ?? 0) > 0;
   },
 
-  getAISettings: async (id: number): Promise<AISettings | null> => {
+    getAISettings: async (id: number): Promise<AISettings | null> => {
     const result = await pool.query(
       `SELECT ai_enabled, COALESCE(ai_verification_enabled, false) as ai_verification_enabled,
               ai_provider, anthropic_api_key, anthropic_model, openai_api_key, openai_model,
-              ollama_base_url, ollama_model, gemini_api_key, gemini_model
+              openai_base_url, ollama_base_url, ollama_model, gemini_api_key, gemini_model
        FROM users WHERE id = $1`,
       [id]
     );
@@ -291,6 +292,10 @@ export const userQueries = {
       fields.push(`openai_model = $${paramIndex++}`);
       values.push(settings.openai_model);
     }
+    if (settings.openai_base_url !== undefined) {
+      fields.push(`openai_base_url = $${paramIndex++}`);
+      values.push(settings.openai_base_url);
+    }
     if (settings.ollama_base_url !== undefined) {
       fields.push(`ollama_base_url = $${paramIndex++}`);
       values.push(settings.ollama_base_url);
@@ -315,7 +320,7 @@ export const userQueries = {
       `UPDATE users SET ${fields.join(', ')} WHERE id = $${paramIndex}
        RETURNING ai_enabled, COALESCE(ai_verification_enabled, false) as ai_verification_enabled,
                  ai_provider, anthropic_api_key, anthropic_model, openai_api_key, openai_model,
-                 ollama_base_url, ollama_model, gemini_api_key, gemini_model`,
+                 openai_base_url, ollama_base_url, ollama_model, gemini_api_key, gemini_model`,
       values
     );
     return result.rows[0] || null;

backend/src/routes/settings.ts

@@ -335,6 +335,7 @@ router.get('/ai', async (req: AuthRequest, res: Response) => {
       anthropic_model: settings.anthropic_model || null,
       openai_api_key: settings.openai_api_key || null,
       openai_model: settings.openai_model || null,
+      openai_base_url: settings.openai_base_url || null,
       ollama_base_url: settings.ollama_base_url || null,
       ollama_model: settings.ollama_model || null,
       gemini_api_key: settings.gemini_api_key || null,
@@ -358,6 +359,7 @@ router.put('/ai', async (req: AuthRequest, res: Response) => {
       anthropic_model,
       openai_api_key,
       openai_model,
+      openai_base_url,
       ollama_base_url,
       ollama_model,
       gemini_api_key,
@@ -372,6 +374,7 @@ router.put('/ai', async (req: AuthRequest, res: Response) => {
       anthropic_model,
       openai_api_key,
       openai_model,
+      openai_base_url,
       ollama_base_url,
       ollama_model,
       gemini_api_key,
@@ -391,6 +394,7 @@ router.put('/ai', async (req: AuthRequest, res: Response) => {
       anthropic_model: settings.anthropic_model || null,
       openai_api_key: settings.openai_api_key || null,
       openai_model: settings.openai_model || null,
+      openai_base_url: settings.openai_base_url || null,
       ollama_base_url: settings.ollama_base_url || null,
       ollama_model: settings.ollama_model || null,
       gemini_api_key: settings.gemini_api_key || null,

backend/src/services/ai-extractor.ts

@@ -253,9 +253,12 @@ async function extractWithAnthropic(
 async function extractWithOpenAI(
   html: string,
   apiKey: string,
-  model?: string | null
+  model?: string | null,
+  baseURL?: string | null
 ): Promise<AIExtractionResult> {
-  const openai = new OpenAI({ apiKey });
+  const openaiConfig: Record<string, string> = { apiKey };
+  if (baseURL) openaiConfig.baseURL = baseURL;
+  const openai = new OpenAI(openaiConfig);
 
   const preparedHtml = prepareHtmlForAI(html);
   const modelToUse = model || DEFAULT_OPENAI_MODEL;
@@ -383,9 +386,12 @@ async function verifyWithOpenAI(
   scrapedPrice: number,
   currency: string,
   apiKey: string,
-  model?: string | null
+  model?: string | null,
+  baseURL?: string | null
 ): Promise<AIVerificationResult> {
-  const openai = new OpenAI({ apiKey });
+  const openaiConfig: Record<string, string> = { apiKey };
+  if (baseURL) openaiConfig.baseURL = baseURL;
+  const openai = new OpenAI(openaiConfig);
 
   const preparedHtml = prepareHtmlForAI(html);
   const prompt = VERIFICATION_PROMPT
@@ -509,9 +515,12 @@ async function verifyStockStatusWithOpenAI(
   variantPrice: number,
   currency: string,
   apiKey: string,
-  model?: string | null
+  model?: string | null,
+  baseURL?: string | null
 ): Promise<AIStockStatusResult> {
-  const openai = new OpenAI({ apiKey });
+  const openaiConfig: Record<string, string> = { apiKey };
+  if (baseURL) openaiConfig.baseURL = baseURL;
+  const openai = new OpenAI(openaiConfig);
 
   const preparedHtml = prepareHtmlForAI(html);
   const prompt = STOCK_STATUS_PROMPT
@@ -808,7 +817,7 @@ export async function extractWithAI(
   if (settings.ai_provider === 'anthropic' && settings.anthropic_api_key) {
     return extractWithAnthropic(html, settings.anthropic_api_key, settings.anthropic_model);
   } else if (settings.ai_provider === 'openai' && settings.openai_api_key) {
-    return extractWithOpenAI(html, settings.openai_api_key, settings.openai_model);
+    return extractWithOpenAI(html, settings.openai_api_key, settings.openai_model, settings.openai_base_url);
   } else if (settings.ai_provider === 'ollama' && settings.ollama_base_url && settings.ollama_model) {
     return extractWithOllama(html, settings.ollama_base_url, settings.ollama_model);
   } else if (settings.ai_provider === 'gemini' && settings.gemini_api_key) {
@@ -841,7 +850,7 @@ export async function tryAIExtraction(
     } else if (settings.ai_provider === 'openai' && settings.openai_api_key) {
       const modelToUse = settings.openai_model || DEFAULT_OPENAI_MODEL;
       console.log(`[AI] Using OpenAI (${modelToUse}) for ${url}`);
-      return await extractWithOpenAI(html, settings.openai_api_key, settings.openai_model);
+      return await extractWithOpenAI(html, settings.openai_api_key, settings.openai_model, settings.openai_base_url);
     } else if (settings.ai_provider === 'ollama' && settings.ollama_base_url && settings.ollama_model) {
       console.log(`[AI] Using Ollama (${settings.ollama_model}) for ${url}`);
       return await extractWithOllama(html, settings.ollama_base_url, settings.ollama_model);
@@ -883,7 +892,7 @@ export async function tryAIVerification(
     } else if (settings.ai_provider === 'openai' && settings.openai_api_key) {
       const modelToUse = settings.openai_model || DEFAULT_OPENAI_MODEL;
       console.log(`[AI Verify] Using OpenAI (${modelToUse}) to verify $${scrapedPrice} for ${url}`);
-      return await verifyWithOpenAI(html, scrapedPrice, currency, settings.openai_api_key, settings.openai_model);
+      return await verifyWithOpenAI(html, scrapedPrice, currency, settings.openai_api_key, settings.openai_model, settings.openai_base_url);
     } else if (settings.ai_provider === 'ollama' && settings.ollama_base_url && settings.ollama_model) {
       console.log(`[AI Verify] Using Ollama (${settings.ollama_model}) to verify $${scrapedPrice} for ${url}`);
       return await verifyWithOllama(html, scrapedPrice, currency, settings.ollama_base_url, settings.ollama_model);
@@ -926,7 +935,7 @@ export async function tryAIStockStatusVerification(
     } else if (settings.ai_provider === 'openai' && settings.openai_api_key) {
       const modelToUse = settings.openai_model || DEFAULT_OPENAI_MODEL;
       console.log(`[AI Stock] Using OpenAI (${modelToUse}) to verify stock status for $${variantPrice} variant at ${url}`);
-      return await verifyStockStatusWithOpenAI(html, variantPrice, currency, settings.openai_api_key, settings.openai_model);
+      return await verifyStockStatusWithOpenAI(html, variantPrice, currency, settings.openai_api_key, settings.openai_model, settings.openai_base_url);
     } else if (settings.ai_provider === 'ollama' && settings.ollama_base_url && settings.ollama_model) {
       console.log(`[AI Stock] Using Ollama (${settings.ollama_model}) to verify stock status for $${variantPrice} variant at ${url}`);
       return await verifyStockStatusWithOllama(html, variantPrice, currency, settings.ollama_base_url, settings.ollama_model);
@@ -1009,9 +1018,12 @@ async function arbitrateWithOpenAI(
   html: string,
   candidates: PriceCandidate[],
   apiKey: string,
-  model?: string | null
+  model?: string | null,
+  baseURL?: string | null
 ): Promise<AIArbitrationResult> {
-  const openai = new OpenAI({ apiKey });
+  const openaiConfig: Record<string, string> = { apiKey };
+  if (baseURL) openaiConfig.baseURL = baseURL;
+  const openai = new OpenAI(openaiConfig);
 
   const candidatesList = candidates.map((c, i) =>
     `${i}. ${c.price} ${c.currency} (method: ${c.method}, context: ${c.context || 'none'})`
@@ -1180,7 +1192,7 @@ export async function tryAIArbitration(
     } else if (settings.ai_provider === 'openai' && settings.openai_api_key) {
       const modelToUse = settings.openai_model || DEFAULT_OPENAI_MODEL;
       console.log(`[AI Arbitrate] Using OpenAI (${modelToUse}) to arbitrate ${candidates.length} prices for ${url}`);
-      return await arbitrateWithOpenAI(html, candidates, settings.openai_api_key, settings.openai_model);
+      return await arbitrateWithOpenAI(html, candidates, settings.openai_api_key, settings.openai_model, settings.openai_base_url);
     } else if (settings.ai_provider === 'ollama' && settings.ollama_base_url && settings.ollama_model) {
       console.log(`[AI Arbitrate] Using Ollama (${settings.ollama_model}) to arbitrate ${candidates.length} prices for ${url}`);
       return await arbitrateWithOllama(html, candidates, settings.ollama_base_url, settings.ollama_model);

database/init.sql

@@ -119,6 +119,17 @@ BEGIN
   END IF;
 END $$;
 
+-- Migration: Add AI base URL columns to users if they don't exist
+DO $$
+BEGIN
+  IF NOT EXISTS (
+    SELECT 1 FROM information_schema.columns
+    WHERE table_name = 'users' AND column_name = 'openai_base_url'
+  ) THEN
+    ALTER TABLE users ADD COLUMN openai_base_url VARCHAR(512);
+  END IF;
+END $$;
+
 -- Price history table
 CREATE TABLE IF NOT EXISTS price_history (
   id SERIAL PRIMARY KEY,

frontend/src/api/client.ts

@@ -259,6 +259,7 @@ export const settingsApi = {
     anthropic_model?: string | null;
     openai_api_key?: string | null;
     openai_model?: string | null;
+    openai_base_url?: string | null;
     ollama_base_url?: string | null;
     ollama_model?: string | null;
     gemini_api_key?: string | null;
@@ -284,6 +285,7 @@ export interface AISettings {
   anthropic_model: string | null;
   openai_api_key: string | null;
   openai_model: string | null;
+  openai_base_url: string | null;
   ollama_base_url: string | null;
   ollama_model: string | null;
   gemini_api_key: string | null;

frontend/src/pages/Settings.tsx

@@ -66,6 +66,7 @@ export default function Settings() {
   const [anthropicModel, setAnthropicModel] = useState('');
   const [openaiApiKey, setOpenaiApiKey] = useState('');
   const [openaiModel, setOpenaiModel] = useState('');
+  const [openaiBaseUrl, setOpenaiBaseUrl] = useState('');
   const [ollamaBaseUrl, setOllamaBaseUrl] = useState('');
   const [ollamaModel, setOllamaModel] = useState('');
   const [availableOllamaModels, setAvailableOllamaModels] = useState<string[]>([]);
@@ -135,6 +136,7 @@ export default function Settings() {
       setAnthropicModel(aiRes.data.anthropic_model || '');
       setOpenaiApiKey(aiRes.data.openai_api_key || '');
       setOpenaiModel(aiRes.data.openai_model || '');
+      setOpenaiBaseUrl(aiRes.data.openai_base_url || '');
       setOllamaBaseUrl(aiRes.data.ollama_base_url || '');
       setOllamaModel(aiRes.data.ollama_model || '');
       setGeminiApiKey(aiRes.data.gemini_api_key || '');
@@ -462,6 +464,7 @@ export default function Settings() {
         anthropic_model: aiProvider === 'anthropic' ? anthropicModel || null : undefined,
         openai_api_key: openaiApiKey || undefined,
         openai_model: aiProvider === 'openai' ? openaiModel || null : undefined,
+        openai_base_url: aiProvider === 'openai' ? openaiBaseUrl || null : undefined,
         ollama_base_url: aiProvider === 'ollama' ? ollamaBaseUrl || null : undefined,
         ollama_model: aiProvider === 'ollama' ? ollamaModel || null : undefined,
         gemini_api_key: geminiApiKey || undefined,
@@ -471,6 +474,7 @@ export default function Settings() {
       setAIVerificationEnabled(response.data.ai_verification_enabled ?? false);
       setAnthropicModel(response.data.anthropic_model || '');
       setOpenaiModel(response.data.openai_model || '');
+      setOpenaiBaseUrl(response.data.openai_base_url || '');
       setGeminiModel(response.data.gemini_model || '');
       setAnthropicApiKey('');
       setOpenaiApiKey('');
@@ -1763,6 +1767,21 @@ export default function Settings() {
                             {aiSettings?.openai_model && ` (currently: ${aiSettings.openai_model})`}
                           </p>
                         </div>
+
+                        <div className="settings-form-group">
+                          <label>Base URL (optional — for LiteLLM / OpenAI-compatible proxies)</label>
+                          <input
+                            type="text"
+                            value={openaiBaseUrl}
+                            onChange={(e) => setOpenaiBaseUrl(e.target.value)}
+                            placeholder="https://api.openai.com/v1"
+                          />
+                          <p className="hint">
+                            Leave blank for default OpenAI API. Set to your LiteLLM proxy URL (e.g., http://litellm:4000/v1)
+                            to use a custom model provider.
+                            {aiSettings?.openai_base_url && ` (currently: ${aiSettings.openai_base_url})`}
+                          </p>
+                        </div>
                       </>
                     )}
 

frontend/tsconfig.tsbuildinfo

@@ -1 +1 @@
-{"root":["./src/app.tsx","./src/main.tsx","./src/vite-env.d.ts","./src/api/client.ts","./src/components/aistatusbadge.tsx","./src/components/authform.tsx","./src/components/layout.tsx","./src/components/notificationbell.tsx","./src/components/particlebackground.tsx","./src/components/passwordinput.tsx","./src/components/pricechart.tsx","./src/components/priceselectionmodal.tsx","./src/components/productcard.tsx","./src/components/productform.tsx","./src/components/sparkline.tsx","./src/components/stocktimeline.tsx","./src/context/authcontext.tsx","./src/context/toastcontext.tsx","./src/hooks/useauth.ts","./src/pages/dashboard.tsx","./src/pages/login.tsx","./src/pages/notificationhistory.tsx","./src/pages/productdetail.tsx","./src/pages/register.tsx","./src/pages/settings.tsx"],"version":"5.9.3"}
+{"root":["./src/App.tsx","./src/main.tsx","./src/vite-env.d.ts","./src/api/client.ts","./src/components/AIStatusBadge.tsx","./src/components/AuthForm.tsx","./src/components/Layout.tsx","./src/components/NotificationBell.tsx","./src/components/ParticleBackground.tsx","./src/components/PasswordInput.tsx","./src/components/PriceChart.tsx","./src/components/PriceSelectionModal.tsx","./src/components/ProductCard.tsx","./src/components/ProductForm.tsx","./src/components/Sparkline.tsx","./src/components/StockTimeline.tsx","./src/context/AuthContext.tsx","./src/context/ToastContext.tsx","./src/hooks/useAuth.ts","./src/pages/Dashboard.tsx","./src/pages/Login.tsx","./src/pages/NotificationHistory.tsx","./src/pages/ProductDetail.tsx","./src/pages/Register.tsx","./src/pages/Settings.tsx"],"version":"5.9.3"}