Enhancement: Adds OpenRouter Base URL for OpenRouter embedder provider

- Adds UI with standard text input within CodeIndexPopover
- Modifies interface accordingly
- Adds UI locales for english (other languages to come)
- Updates the config-manager with boiler plate
- Update openrouter embedder code to use baseURL if available, otherwise use default.

src/services/code-index/config-manager.ts

@@ -21,7 +21,7 @@ export class CodeIndexConfigManager {
 	private mistralOptions?: { apiKey: string }
 	private vercelAiGatewayOptions?: { apiKey: string }
 	private bedrockOptions?: { region: string; profile?: string }
-	private openRouterOptions?: { apiKey: string; specificProvider?: string }
+	private openRouterOptions?: { apiKey: string; specificProvider?: string; openRouterBaseUrl?: string }
 	private qdrantUrl?: string = "http://localhost:6333"
 	private qdrantApiKey?: string
 	private searchMinScore?: number
@@ -142,7 +142,11 @@ export class CodeIndexConfigManager {
 		this.mistralOptions = mistralApiKey ? { apiKey: mistralApiKey } : undefined
 		this.vercelAiGatewayOptions = vercelAiGatewayApiKey ? { apiKey: vercelAiGatewayApiKey } : undefined
 		this.openRouterOptions = openRouterApiKey
-			? { apiKey: openRouterApiKey, specificProvider: openRouterSpecificProvider || undefined }
+			? {
+					apiKey: openRouterApiKey,
+					openRouterBaseUrl: codebaseIndexEmbedderBaseUrl,
+					specificProvider: openRouterSpecificProvider || undefined,
+				}
 			: undefined
 		// Set bedrockOptions if region is provided (profile is optional)
 		this.bedrockOptions = bedrockRegion
@@ -167,7 +171,7 @@ export class CodeIndexConfigManager {
 			mistralOptions?: { apiKey: string }
 			vercelAiGatewayOptions?: { apiKey: string }
 			bedrockOptions?: { region: string; profile?: string }
-			openRouterOptions?: { apiKey: string }
+			openRouterOptions?: { apiKey: string; specificProvider?: string; openRouterBaseUrl?: string }
 			qdrantUrl?: string
 			qdrantApiKey?: string
 			searchMinScore?: number
@@ -191,6 +195,7 @@ export class CodeIndexConfigManager {
 			bedrockRegion: this.bedrockOptions?.region ?? "",
 			bedrockProfile: this.bedrockOptions?.profile ?? "",
 			openRouterApiKey: this.openRouterOptions?.apiKey ?? "",
+			openRouterBaseUrl: this.openRouterOptions?.openRouterBaseUrl ?? "",
 			openRouterSpecificProvider: this.openRouterOptions?.specificProvider ?? "",
 			qdrantUrl: this.qdrantUrl ?? "",
 			qdrantApiKey: this.qdrantApiKey ?? "",
@@ -269,6 +274,7 @@ export class CodeIndexConfigManager {
 			return isConfigured
 		} else if (this.embedderProvider === "openrouter") {
 			const apiKey = this.openRouterOptions?.apiKey
+			const openRouterBaseUrl = this.openRouterOptions?.openRouterBaseUrl
 			const qdrantUrl = this.qdrantUrl
 			const isConfigured = !!(apiKey && qdrantUrl)
 			return isConfigured
@@ -310,6 +316,7 @@ export class CodeIndexConfigManager {
 		const prevBedrockRegion = prev?.bedrockRegion ?? ""
 		const prevBedrockProfile = prev?.bedrockProfile ?? ""
 		const prevOpenRouterApiKey = prev?.openRouterApiKey ?? ""
+		const prevOpenRouterBaseUrl = prev?.openRouterBaseUrl ?? ""
 		const prevOpenRouterSpecificProvider = prev?.openRouterSpecificProvider ?? ""
 		const prevQdrantUrl = prev?.qdrantUrl ?? ""
 		const prevQdrantApiKey = prev?.qdrantApiKey ?? ""
@@ -353,6 +360,7 @@ export class CodeIndexConfigManager {
 		const currentBedrockProfile = this.bedrockOptions?.profile ?? ""
 		const currentOpenRouterApiKey = this.openRouterOptions?.apiKey ?? ""
 		const currentOpenRouterSpecificProvider = this.openRouterOptions?.specificProvider ?? ""
+		const currentOpenRouterBaseUrl = this.openRouterOptions?.openRouterBaseUrl ?? ""
 		const currentQdrantUrl = this.qdrantUrl ?? ""
 		const currentQdrantApiKey = this.qdrantApiKey ?? ""
 
@@ -396,6 +404,10 @@ export class CodeIndexConfigManager {
 			return true
 		}
 
+		if (prevOpenRouterBaseUrl !== currentOpenRouterBaseUrl) {
+			return true
+		}
+
 		// Check for model dimension changes (generic for all providers)
 		if (prevModelDimension !== currentModelDimension) {
 			return true

src/services/code-index/embedders/openrouter.ts

@@ -58,13 +58,22 @@ export class OpenRouterEmbedder implements IEmbedder {
 	 * @param apiKey The API key for authentication
 	 * @param modelId Optional model identifier (defaults to "openai/text-embedding-3-large")
 	 * @param maxItemTokens Optional maximum tokens per item (defaults to MAX_ITEM_TOKENS)
+	 * @param openRouterBaseUrl Optional custom OpenRouter base URL
 	 * @param specificProvider Optional specific provider to route requests to
 	 */
-	constructor(apiKey: string, modelId?: string, maxItemTokens?: number, specificProvider?: string) {
+	constructor(
+		apiKey: string,
+		modelId?: string,
+		maxItemTokens?: number,
+		openRouterBaseUrl?: string,
+		specificProvider?: string,
+	) {
 		if (!apiKey) {
 			throw new Error(t("embeddings:validation.apiKeyRequired"))
 		}
 
+		let baseUrl = openRouterBaseUrl || "https://openrouter.ai/api/v1"
+
 		this.apiKey = apiKey
 		// Only set specificProvider if it's not the default value
 		this.specificProvider =

src/services/code-index/interfaces/config.ts

@@ -16,7 +16,7 @@ export interface CodeIndexConfig {
 	mistralOptions?: { apiKey: string }
 	vercelAiGatewayOptions?: { apiKey: string }
 	bedrockOptions?: { region: string; profile?: string }
-	openRouterOptions?: { apiKey: string; specificProvider?: string }
+	openRouterOptions?: { apiKey: string; specificProvider?: string; openRouterBaseUrl?: string }
 	qdrantUrl?: string
 	qdrantApiKey?: string
 	searchMinScore?: number
@@ -42,6 +42,7 @@ export type PreviousConfigSnapshot = {
 	bedrockRegion?: string
 	bedrockProfile?: string
 	openRouterApiKey?: string
+	openRouterBaseUrl?: string
 	openRouterSpecificProvider?: string
 	qdrantUrl?: string
 	qdrantApiKey?: string

webview-ui/src/components/chat/CodeIndexPopover.tsx

@@ -53,6 +53,7 @@ import {
 // Default URLs for providers
 const DEFAULT_QDRANT_URL = "http://localhost:6333"
 const DEFAULT_OLLAMA_URL = "http://localhost:11434"
+const DEFAULT_OPENROUTER_URL = "https://openrouter.ai/api/v1"
 
 interface CodeIndexPopoverProps {
 	children: React.ReactNode
@@ -1321,6 +1322,37 @@ export const CodeIndexPopover: React.FC<CodeIndexPopoverProps> = ({
 
 									{currentSettings.codebaseIndexEmbedderProvider === "openrouter" && (
 										<>
+											<div className="space-y-2">
+												<label className="text-sm font-medium">
+													{t("settings:codeIndex.openRouterBaseUrlLabel")}
+												</label>
+												<VSCodeTextField
+													value={currentSettings.codebaseIndexEmbedderBaseUrl || ""}
+													onInput={(e: any) =>
+														updateSetting("codebaseIndexEmbedderBaseUrl", e.target.value)
+													}
+													onBlur={(e: any) => {
+														// Set default OpenRouter URL if field is empty
+														if (!e.target.value.trim()) {
+															e.target.value = DEFAULT_OPENROUTER_URL
+															updateSetting(
+																"codebaseIndexEmbedderBaseUrl",
+																DEFAULT_OPENROUTER_URL,
+															)
+														}
+													}}
+													placeholder={t("settings:codeIndex.openRouterUrlPlaceholder")}
+													className={cn("w-full", {
+														"border-red-500": formErrors.codebaseIndexEmbedderBaseUrl,
+													})}
+												/>
+												{formErrors.codebaseIndexEmbedderBaseUrl && (
+													<p className="text-xs text-vscode-errorForeground mt-1 mb-0">
+														{formErrors.codebaseIndexEmbedderBaseUrl}
+													</p>
+												)}
+											</div>
+
 											<div className="space-y-2">
 												<label className="text-sm font-medium">
 													{t("settings:codeIndex.openRouterApiKeyLabel")}

webview-ui/src/i18n/locales/en/settings.json

@@ -106,6 +106,8 @@
 		"openRouterApiKeyPlaceholder": "Enter your OpenRouter API key",
 		"openRouterProviderRoutingLabel": "OpenRouter Provider Routing",
 		"openRouterProviderRoutingDescription": "OpenRouter routes requests to the best available providers for your embedding model. By default, requests are load balanced across the top providers to maximize uptime. However, you can choose a specific provider to use for this model.",
+		"openRouterBaseUrlLabel": "OpenRouter Base URL",
+		"openRouterUrlPlaceholder": "https://openrouter.ai/api/v1",
 		"openaiCompatibleProvider": "OpenAI Compatible",
 		"openAiKeyLabel": "OpenAI API Key",
 		"openAiKeyPlaceholder": "Enter your OpenAI API key",