diff --git a/.dev.vars.example b/.dev.vars.example
index 756ac38..3f6012b 100644
--- a/.dev.vars.example
+++ b/.dev.vars.example
@@ -11,7 +11,7 @@ GCP_SERVICE_ACCOUNT={"access_token":"ya29.a0AS3H6Nx...","refresh_token":"1//09Ft
 # When set, clients must include "Authorization: Bearer <your-api-key>" header
 # Example: sk-1234567890abcdef1234567890abcdef
 OPENAI_API_KEY=sk-your-secret-api-key-here
-
+GEMINI_PROJECT_MAP={"sk-key-0": {"GEMINI_PROJECT_ID": "xxxx","GCP_SERVICE_ACCOUNT":{"access_token":"ya29.a0AS3H6Nx...","refresh_token":"1//09FtpJYpxOd...","scope":"https://www.googleapis.com/auth/cloud-platform ...","token_type":"Bearer","id_token":"eyJhbGciOiJSUzI1NiIs...","expiry_date":1750927763467}}, "sk-key-1": {"GEMINI_PROJECT_ID": "xxxx","GCP_SERVICE_ACCOUNT":{"access_token":"ya29.a0AS3H6Nx...","refresh_token":"1//09FtpJYpxOd...","scope":"https://www.googleapis.com/auth/cloud-platform ...","token_type":"Bearer","id_token":"eyJhbGciOiJSUzI1NiIs...","expiry_date":1750927763467}}}
 # Optional: Enable fake thinking output for thinking models (set to "true" to enable)
 # When enabled, models marked with thinking: true will generate synthetic reasoning text
 # before providing their actual response, similar to OpenAI's o3 model behavior
diff --git a/README.md b/README.md
index 8118e06..0ce46dd 100644
--- a/README.md
+++ b/README.md
@@ -19,6 +19,7 @@ Transform Google's Gemini models into OpenAI-compatible endpoints using Cloudfla
 - 🆓 **Free Tier Access** - Leverage Google's free tier through Code Assist API
 - 📡 **Real-time Streaming** - Server-sent events for live responses with token usage
 - 🎭 **Multiple Models** - Access to latest Gemini models including experimental ones
+- 🧑🏻‍🤝‍🧑🏻 **Multiple Google Profile** - Switch your Google profile based on OPENAI_API_KEY
 
 ## 🤖 Supported Models
 
@@ -161,7 +162,7 @@ npm run dev
 | `GCP_SERVICE_ACCOUNT` | ✅ | OAuth2 credentials JSON string. |
 | `GEMINI_PROJECT_ID` | ❌ | Google Cloud Project ID (auto-discovered if not set). |
 | `OPENAI_API_KEY` | ❌ | API key for authentication. If not set, the API is public. |
-
+| `GEMINI_PROJECT_MAP` | ❌ | Mutiple OAuth2 Profile|
 #### Thinking & Reasoning
 
 | Variable | Description |
diff --git a/src/middlewares/auth.ts b/src/middlewares/auth.ts
index 35f44e8..ec2fa92 100644
--- a/src/middlewares/auth.ts
+++ b/src/middlewares/auth.ts
@@ -1,6 +1,8 @@
 import { MiddlewareHandler } from "hono";
 import { Env } from "../types";
-
+import {
+	KV_TOKEN_KEY
+} from "../config";
 /**
  * Middleware to enforce OpenAI-style API key authentication if OPENAI_API_KEY is set in the environment.
  * Checks for 'Authorization: Bearer <key>' header on protected routes.
@@ -46,7 +48,45 @@ export const openAIApiKeyAuth: MiddlewareHandler<{ Bindings: Env }> = async (c,
 		}
 
 		const providedKey = match[1];
-		if (providedKey !== c.env.OPENAI_API_KEY) {
+		//console.log(`providedKe:${providedKey},  c.env.GEMINI_PROJECT_MAP: ${c.env.GEMINI_PROJECT_MAP}`)
+		// const AUTH_MAP = JSON.parse(c.env.GEMINI_PROJECT_MAP || "{}"); 
+		// GEMINI_PROJECT_MAP may excceds cloudflare secret limit
+		// read from KV storage
+		var AUTH_MAP = await c.env.GEMINI_CLI_KV.get("GEMINI_PROJECT_MAP","json");
+		if (! AUTH_MAP ){
+			AUTH_MAP = JSON.parse(c.env.GEMINI_PROJECT_MAP || "{}");
+			try {
+				await c.env.GEMINI_CLI_KV.put("GEMINI_PROJECT_MAP", JSON.stringify(AUTH_MAP));
+				console.log("Saved GEMINI_PROJECT_MAP to KV storage");
+			} catch (kvError) {	
+				console.log(`Failed to save GEMINI_PROJECT_MAP to KV storage: ${kvError}`);
+			
+			}
+		}
+		//console.log(`AUTH_MAP:${AUTH_MAP}`, AUTH_MAP);
+		if (providedKey == c.env.OPENAI_API_KEY){
+	        return next();
+		}
+
+		if (AUTH_MAP.hasOwnProperty(providedKey)){
+
+			const provider  = AUTH_MAP[providedKey];
+			if(provider.hasOwnProperty("GCP_SERVICE_ACCOUNT"))
+				c.env.GCP_SERVICE_ACCOUNT = JSON.stringify(provider["GCP_SERVICE_ACCOUNT"]);
+			if(provider.hasOwnProperty("GEMINI_PROJECT_ID"))
+				c.env.GEMINI_PROJECT_ID = provider["GEMINI_PROJECT_ID"] ;
+
+			if (providedKey !== c.env.OPENAI_API_KEY){
+				try {
+					await c.env.GEMINI_CLI_KV.delete(KV_TOKEN_KEY);
+					console.log("Cleared cached token from KV storage");
+				} catch (kvError) {
+					console.log("Error clearing KV cache:", kvError);
+				}
+			}
+
+			c.env.OPENAI_API_KEY = providedKey;
+		}else {
 			return c.json(
 				{
 					error: {
diff --git a/src/types.ts b/src/types.ts
index e30ba3d..3d43c99 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -13,6 +13,7 @@ export interface Env {
 	GCP_SERVICE_ACCOUNT: string; // Now contains OAuth2 credentials JSON
 	GEMINI_PROJECT_ID?: string;
 	GEMINI_CLI_KV: KVNamespace; // Cloudflare KV for token caching
+	GEMINI_PROJECT_MAP?: string;// Multiple auth profile
 	OPENAI_API_KEY?: string; // Optional API key for authentication
 	ENABLE_FAKE_THINKING?: string; // Optional flag to enable fake thinking output (set to "true" to enable)
 	ENABLE_REAL_THINKING?: string; // Optional flag to enable real Gemini thinking output (set to "true" to enable)