diff --git a/account-manager.js b/account-manager.js
new file mode 100644
index 0000000..75b207f
--- /dev/null
+++ b/account-manager.js
@@ -0,0 +1,418 @@
+import fs from 'fs';
+import path from 'path';
+import fetch from 'node-fetch';
+import { logInfo, logDebug, logError } from './logger.js';
+import { getNextProxyAgent } from './proxy-manager.js';
+
+/**
+ * Account Manager - 管理多个 OAuth 账号的选择、刷新和统计
+ * 
+ * 设计思路：
+ * 1. 支持多个 refresh_token 账号池
+ * 2. 基于健康度加权轮询选择账号
+ * 3. 自动刷新 access_token
+ * 4. 401/402 时自动禁用异常账号
+ */
+
+const REFRESH_URL = 'https://api.workos.com/user_management/authenticate';
+const REFRESH_INTERVAL_HOURS = 6;
+const CLIENT_ID = 'client_01HNM792M5G5G1A2THWPXKFMXB';
+
+class AccountManager {
+    constructor() {
+        this.accounts = [];
+        this.settings = {
+            algorithm: 'weighted', // 'weighted' or 'simple'
+            refresh_interval_hours: REFRESH_INTERVAL_HOURS,
+            disable_on_401: true,
+            disable_on_402: true
+        };
+        this.simpleIndex = 0;
+        this.configPath = null;
+        this.endpointStats = {}; // 端点统计
+    }
+
+    /**
+     * 从配置文件加载账号
+     */
+    async loadAccounts(configPath = null) {
+        // 优先检查环境变量中的多账号配置
+        const envAccounts = process.env.OAUTH_ACCOUNTS;
+        if (envAccounts) {
+            try {
+                const parsed = JSON.parse(envAccounts);
+                this.accounts = this._normalizeAccounts(parsed);
+                logInfo(`AccountManager: 从环境变量加载了 ${this.accounts.length} 个账号`);
+                return true;
+            } catch (e) {
+                logError('AccountManager: 解析 OAUTH_ACCOUNTS 环境变量失败', e);
+            }
+        }
+
+        // 检查配置文件
+        const possiblePaths = [
+            configPath,
+            path.join(process.cwd(), 'accounts.json'),
+            path.join(process.cwd(), 'oauth_accounts.json')
+        ].filter(Boolean);
+
+        for (const p of possiblePaths) {
+            if (fs.existsSync(p)) {
+                try {
+                    const content = fs.readFileSync(p, 'utf-8');
+                    const data = JSON.parse(content);
+
+                    this.accounts = this._normalizeAccounts(data.accounts || data);
+                    if (data.settings) {
+                        this.settings = { ...this.settings, ...data.settings };
+                    }
+                    this.configPath = p;
+
+                    logInfo(`AccountManager: 从 ${p} 加载了 ${this.accounts.length} 个账号`);
+                    return true;
+                } catch (e) {
+                    logError(`AccountManager: 读取配置文件 ${p} 失败`, e);
+                }
+            }
+        }
+
+        logInfo('AccountManager: 未找到多账号配置，将回退到单账号模式');
+        return false;
+    }
+
+    /**
+     * 标准化账号数据结构
+     */
+    _normalizeAccounts(accounts) {
+        if (!Array.isArray(accounts)) {
+            accounts = [accounts];
+        }
+
+        return accounts.map((acc, index) => ({
+            id: acc.id || `account_${index + 1}`,
+            name: acc.name || `账号${index + 1}`,
+            refresh_token: acc.refresh_token,
+            access_token: acc.access_token || null,
+            last_refresh: acc.last_refresh ? new Date(acc.last_refresh).getTime() : null,
+            status: acc.status || 'active', // 'active', 'disabled', 'rate_limited'
+            disable_reason: acc.disable_reason || null,
+            stats: acc.stats || { success: 0, fail: 0 }
+        }));
+    }
+
+    /**
+     * 获取活跃账号列表
+     */
+    getActiveAccounts() {
+        return this.accounts.filter(acc => acc.status === 'active');
+    }
+
+    /**
+     * 选择一个账号（基于配置的算法）
+     */
+    selectAccount() {
+        const activeAccounts = this.getActiveAccounts();
+
+        if (activeAccounts.length === 0) {
+            throw new Error('AccountManager: 没有可用账号 - 所有账号已被禁用');
+        }
+
+        if (activeAccounts.length === 1) {
+            return activeAccounts[0];
+        }
+
+        if (this.settings.algorithm === 'simple') {
+            return this._simpleSelect(activeAccounts);
+        } else {
+            return this._weightedSelect(activeAccounts);
+        }
+    }
+
+    /**
+     * 简单轮询算法
+     */
+    _simpleSelect(accounts) {
+        const account = accounts[this.simpleIndex % accounts.length];
+        this.simpleIndex = (this.simpleIndex + 1) % accounts.length;
+        logDebug(`AccountManager: 简单轮询选择账号 ${account.id}`);
+        return account;
+    }
+
+    /**
+     * 基于健康度的加权选择算法
+     */
+    _weightedSelect(accounts) {
+        const weights = accounts.map(acc => {
+            const total = acc.stats.success + acc.stats.fail;
+            if (total === 0) {
+                return 1; // 新账号默认权重
+            }
+            // 成功率 + 0.1（确保失败账号也有机会恢复）
+            return (acc.stats.success / total) + 0.1;
+        });
+
+        const totalWeight = weights.reduce((sum, w) => sum + w, 0);
+        let random = Math.random() * totalWeight;
+
+        for (let i = 0; i < weights.length; i++) {
+            random -= weights[i];
+            if (random <= 0) {
+                const acc = accounts[i];
+                logDebug(`AccountManager: 加权选择账号 ${acc.id}, 健康度: ${((weights[i] - 0.1) * 100).toFixed(1)}%`);
+                return acc;
+            }
+        }
+
+        return accounts[accounts.length - 1];
+    }
+
+    /**
+     * 获取账号的 access_token（自动刷新）
+     */
+    async getAccessToken(account) {
+        // 检查是否需要刷新
+        const needsRefresh = !account.access_token || this._shouldRefresh(account);
+
+        if (needsRefresh) {
+            await this._refreshToken(account);
+        }
+
+        return account.access_token;
+    }
+
+    /**
+     * 检查是否需要刷新 token
+     */
+    _shouldRefresh(account) {
+        if (!account.last_refresh) {
+            return true;
+        }
+        const hoursSinceRefresh = (Date.now() - account.last_refresh) / (1000 * 60 * 60);
+        return hoursSinceRefresh >= this.settings.refresh_interval_hours;
+    }
+
+    /**
+     * 刷新账号的 access_token
+     */
+    async _refreshToken(account) {
+        logInfo(`AccountManager: 刷新账号 ${account.id} 的 token...`);
+
+        try {
+            const formData = new URLSearchParams();
+            formData.append('grant_type', 'refresh_token');
+            formData.append('refresh_token', account.refresh_token);
+            formData.append('client_id', CLIENT_ID);
+
+            const proxyAgentInfo = getNextProxyAgent(REFRESH_URL);
+            const fetchOptions = {
+                method: 'POST',
+                headers: {
+                    'Content-Type': 'application/x-www-form-urlencoded'
+                },
+                body: formData.toString()
+            };
+
+            if (proxyAgentInfo?.agent) {
+                fetchOptions.agent = proxyAgentInfo.agent;
+            }
+
+            const response = await fetch(REFRESH_URL, fetchOptions);
+
+            if (!response.ok) {
+                const errorText = await response.text();
+                throw new Error(`刷新失败: ${response.status} ${errorText}`);
+            }
+
+            const data = await response.json();
+
+            // 更新账号信息
+            account.access_token = data.access_token;
+            account.refresh_token = data.refresh_token; // 更新 refresh_token
+            account.last_refresh = Date.now();
+
+            // 记录用户信息
+            if (data.user) {
+                account.email = data.user.email;
+                logInfo(`AccountManager: 账号 ${account.id} 刷新成功 - ${data.user.email}`);
+            }
+
+            // 保存配置
+            this._saveConfig();
+
+            return data.access_token;
+
+        } catch (error) {
+            logError(`AccountManager: 账号 ${account.id} 刷新失败`, error);
+
+            // 刷新失败可能是 refresh_token 失效，禁用账号
+            if (error.message.includes('401') || error.message.includes('invalid')) {
+                this.disableAccount(account.id, 'refresh_token_invalid');
+            }
+
+            throw error;
+        }
+    }
+
+    /**
+     * 记录请求结果
+     */
+    recordResult(accountId, endpoint, success, statusCode) {
+        const account = this.accounts.find(acc => acc.id === accountId);
+        if (!account) return;
+
+        if (success) {
+            account.stats.success++;
+        } else {
+            account.stats.fail++;
+
+            // 检查是否需要禁用账号
+            if (statusCode === 401 && this.settings.disable_on_401) {
+                this.disableAccount(accountId, '401_unauthorized');
+            } else if (statusCode === 402 && this.settings.disable_on_402) {
+                this.disableAccount(accountId, '402_payment_required');
+            }
+        }
+
+        // 更新端点统计
+        if (!this.endpointStats[endpoint]) {
+            this.endpointStats[endpoint] = { success: 0, fail: 0 };
+        }
+        if (success) {
+            this.endpointStats[endpoint].success++;
+        } else {
+            this.endpointStats[endpoint].fail++;
+        }
+    }
+
+    /**
+     * 禁用账号
+     */
+    disableAccount(accountId, reason) {
+        const account = this.accounts.find(acc => acc.id === accountId);
+        if (!account) return;
+
+        account.status = 'disabled';
+        account.disable_reason = reason;
+        account.disabled_at = new Date().toISOString();
+
+        logError(`AccountManager: 账号 ${accountId} 已禁用，原因: ${reason}`);
+
+        // 保存配置
+        this._saveConfig();
+
+        // 记录到废弃账号文件
+        this._logDeprecatedAccount(account);
+    }
+
+    /**
+     * 记录废弃账号到文件
+     */
+    _logDeprecatedAccount(account) {
+        try {
+            const logPath = path.join(process.cwd(), 'deprecated_accounts.txt');
+            const logEntry = `[${new Date().toISOString()}] ${account.id} (${account.email || 'unknown'}) - ${account.disable_reason}\n`;
+            fs.appendFileSync(logPath, logEntry, 'utf-8');
+        } catch (e) {
+            logError('AccountManager: 记录废弃账号失败', e);
+        }
+    }
+
+    /**
+     * 保存配置到文件
+     */
+    _saveConfig() {
+        if (!this.configPath) return;
+
+        try {
+            const data = {
+                accounts: this.accounts.map(acc => ({
+                    id: acc.id,
+                    name: acc.name,
+                    refresh_token: acc.refresh_token,
+                    access_token: acc.access_token,
+                    last_refresh: acc.last_refresh ? new Date(acc.last_refresh).toISOString() : null,
+                    status: acc.status,
+                    disable_reason: acc.disable_reason,
+                    email: acc.email,
+                    stats: acc.stats
+                })),
+                settings: this.settings,
+                last_updated: new Date().toISOString()
+            };
+
+            fs.writeFileSync(this.configPath, JSON.stringify(data, null, 2), 'utf-8');
+            logDebug(`AccountManager: 配置已保存到 ${this.configPath}`);
+        } catch (e) {
+            logError('AccountManager: 保存配置失败', e);
+        }
+    }
+
+    /**
+     * 获取状态信息（用于 /status 页面）
+     */
+    getStatus() {
+        return {
+            total_accounts: this.accounts.length,
+            active_accounts: this.getActiveAccounts().length,
+            algorithm: this.settings.algorithm,
+            accounts: this.accounts.map(acc => ({
+                id: acc.id,
+                name: acc.name,
+                email: acc.email || 'unknown',
+                status: acc.status,
+                disable_reason: acc.disable_reason,
+                stats: acc.stats,
+                health: this._calculateHealth(acc),
+                last_refresh: acc.last_refresh ? new Date(acc.last_refresh).toISOString() : null
+            })),
+            endpoint_stats: this.endpointStats
+        };
+    }
+
+    /**
+     * 计算账号健康度
+     */
+    _calculateHealth(account) {
+        const total = account.stats.success + account.stats.fail;
+        if (total === 0) return 100;
+        return Math.round((account.stats.success / total) * 100);
+    }
+
+    /**
+     * 检查是否有多账号配置
+     */
+    hasMultipleAccounts() {
+        return this.accounts.length > 1;
+    }
+
+    /**
+     * 获取账号数量
+     */
+    getAccountCount() {
+        return this.accounts.length;
+    }
+}
+
+// 单例实例
+let accountManagerInstance = null;
+
+/**
+ * 获取 AccountManager 实例
+ */
+export function getAccountManager() {
+    if (!accountManagerInstance) {
+        accountManagerInstance = new AccountManager();
+    }
+    return accountManagerInstance;
+}
+
+/**
+ * 初始化 AccountManager
+ */
+export async function initializeAccountManager() {
+    const manager = getAccountManager();
+    const loaded = await manager.loadAccounts();
+    return loaded;
+}
+
+export default AccountManager;
diff --git a/accounts.json.example b/accounts.json.example
new file mode 100644
index 0000000..c1d564a
--- /dev/null
+++ b/accounts.json.example
@@ -0,0 +1,22 @@
+{
+  "accounts": [
+    {
+      "id": "account_1",
+      "name": "主账号",
+      "refresh_token": "YOUR_REFRESH_TOKEN_1",
+      "status": "active"
+    },
+    {
+      "id": "account_2",
+      "name": "备用账号",
+      "refresh_token": "YOUR_REFRESH_TOKEN_2",
+      "status": "active"
+    }
+  ],
+  "settings": {
+    "algorithm": "weighted",
+    "refresh_interval_hours": 6,
+    "disable_on_401": true,
+    "disable_on_402": true
+  }
+}
diff --git a/add-account.js b/add-account.js
new file mode 100644
index 0000000..ecace47
--- /dev/null
+++ b/add-account.js
@@ -0,0 +1,356 @@
+#!/usr/bin/env node
+/**
+ * add-account.js - OAuth 账号授权辅助工具
+ * 
+ * 用途：简化多账号 OAuth refresh_token 的获取流程
+ * 
+ * 使用方式：
+ *   node add-account.js           # 交互式添加账号
+ *   node add-account.js --loop    # 连续添加多个账号
+ * 
+ * 流程：
+ *   1. 向 WorkOS 请求设备授权码
+ *   2. 自动打开浏览器（或显示链接）
+ *   3. 用户在浏览器完成登录
+ *   4. 脚本轮询获取 access_token + refresh_token
+ *   5. 自动保存到 accounts.json
+ */
+
+import fs from 'fs';
+import path from 'path';
+import fetch from 'node-fetch';
+import { fileURLToPath } from 'url';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+// WorkOS 配置（从 Factory CLI 逆向获取）
+const WORKOS_CLIENT_ID = 'client_01HNM792M5G5G1A2THWPXKFMXB';
+const WORKOS_AUTHORIZE_URL = 'https://api.workos.com/user_management/authorize/device';
+const WORKOS_TOKEN_URL = 'https://api.workos.com/user_management/authenticate';
+
+// 配置
+const ACCOUNTS_FILE = path.join(process.cwd(), 'accounts.json');
+const POLL_INTERVAL_MS = 2000; // 轮询间隔 2 秒
+const POLL_TIMEOUT_MS = 300000; // 轮询超时 5 分钟
+
+/**
+ * 请求设备授权码
+ */
+async function requestDeviceCode() {
+    console.log('\n🔐 正在请求设备授权码...');
+
+    const response = await fetch(WORKOS_AUTHORIZE_URL, {
+        method: 'POST',
+        headers: {
+            'Content-Type': 'application/json'
+        },
+        body: JSON.stringify({
+            client_id: WORKOS_CLIENT_ID
+        })
+    });
+
+    if (!response.ok) {
+        const error = await response.text();
+        throw new Error(`请求设备授权码失败: ${response.status} ${error}`);
+    }
+
+    const data = await response.json();
+    return data;
+}
+
+/**
+ * 轮询获取 token
+ */
+async function pollForToken(deviceCode) {
+    const startTime = Date.now();
+
+    while (Date.now() - startTime < POLL_TIMEOUT_MS) {
+        try {
+            const formData = new URLSearchParams();
+            formData.append('grant_type', 'urn:ietf:params:oauth:grant-type:device_code');
+            formData.append('device_code', deviceCode);
+            formData.append('client_id', WORKOS_CLIENT_ID);
+
+            const response = await fetch(WORKOS_TOKEN_URL, {
+                method: 'POST',
+                headers: {
+                    'Content-Type': 'application/x-www-form-urlencoded'
+                },
+                body: formData.toString()
+            });
+
+            if (response.ok) {
+                const data = await response.json();
+                return data;
+            }
+
+            const errorData = await response.json().catch(() => ({}));
+
+            if (errorData.error === 'authorization_pending') {
+                // 用户还未授权，继续轮询
+                process.stdout.write('.');
+            } else if (errorData.error === 'slow_down') {
+                // 需要降低轮询速度
+                await sleep(POLL_INTERVAL_MS * 2);
+                continue;
+            } else if (errorData.error === 'expired_token') {
+                throw new Error('授权码已过期，请重新开始');
+            } else if (errorData.error === 'access_denied') {
+                throw new Error('授权被拒绝');
+            }
+
+        } catch (err) {
+            if (err.message.includes('授权')) {
+                throw err;
+            }
+            // 网络错误，继续轮询
+        }
+
+        await sleep(POLL_INTERVAL_MS);
+    }
+
+    throw new Error('授权超时（5分钟），请重新开始');
+}
+
+/**
+ * 保存账号到配置文件
+ */
+function saveAccount(tokenData) {
+    let accounts = { accounts: [], settings: {} };
+
+    // 读取现有配置
+    if (fs.existsSync(ACCOUNTS_FILE)) {
+        try {
+            accounts = JSON.parse(fs.readFileSync(ACCOUNTS_FILE, 'utf-8'));
+        } catch (e) {
+            console.warn('⚠️ 无法读取现有配置，将创建新文件');
+        }
+    }
+
+    // 确保 accounts 数组存在
+    if (!accounts.accounts) {
+        accounts.accounts = [];
+    }
+
+    // 提取用户信息
+    const user = tokenData.user || {};
+    const email = user.email || 'unknown';
+
+    // 检查是否已存在此账号
+    const existingIndex = accounts.accounts.findIndex(acc => acc.email === email);
+    if (existingIndex >= 0) {
+        // 更新现有账号
+        accounts.accounts[existingIndex] = {
+            ...accounts.accounts[existingIndex],
+            refresh_token: tokenData.refresh_token,
+            access_token: tokenData.access_token,
+            last_refresh: new Date().toISOString(),
+            status: 'active'
+        };
+        console.log(`\n✅ 账号已更新: ${email}`);
+    } else {
+        // 添加新账号
+        const newAccount = {
+            id: `account_${accounts.accounts.length + 1}`,
+            name: user.first_name ? `${user.first_name} ${user.last_name}` : email,
+            email: email,
+            refresh_token: tokenData.refresh_token,
+            access_token: tokenData.access_token,
+            last_refresh: new Date().toISOString(),
+            status: 'active',
+            stats: { success: 0, fail: 0 }
+        };
+        accounts.accounts.push(newAccount);
+        console.log(`\n✅ 新账号已添加: ${email}`);
+    }
+
+    // 设置默认配置
+    if (!accounts.settings || Object.keys(accounts.settings).length === 0) {
+        accounts.settings = {
+            algorithm: 'weighted',
+            refresh_interval_hours: 6,
+            disable_on_401: true,
+            disable_on_402: true
+        };
+    }
+
+    // 保存配置
+    accounts.last_updated = new Date().toISOString();
+    fs.writeFileSync(ACCOUNTS_FILE, JSON.stringify(accounts, null, 2), 'utf-8');
+    console.log(`📁 配置已保存到: ${ACCOUNTS_FILE}`);
+
+    return accounts;
+}
+
+/**
+ * 尝试自动打开浏览器
+ */
+async function openBrowser(url) {
+    const { exec } = await import('child_process');
+    const platform = process.platform;
+
+    return new Promise((resolve) => {
+        let command;
+        if (platform === 'darwin') {
+            command = `open "${url}"`;
+        } else if (platform === 'win32') {
+            command = `start "" "${url}"`;
+        } else {
+            command = `xdg-open "${url}"`;
+        }
+
+        exec(command, (error) => {
+            if (error) {
+                console.log('\n⚠️ 无法自动打开浏览器，请手动打开以下链接');
+                resolve(false);
+            } else {
+                resolve(true);
+            }
+        });
+    });
+}
+
+/**
+ * 睡眠函数
+ */
+function sleep(ms) {
+    return new Promise(resolve => setTimeout(resolve, ms));
+}
+
+/**
+ * 显示当前账号状态
+ */
+function showAccountStatus() {
+    if (!fs.existsSync(ACCOUNTS_FILE)) {
+        console.log('\n📋 当前没有已配置的账号');
+        return;
+    }
+
+    try {
+        const accounts = JSON.parse(fs.readFileSync(ACCOUNTS_FILE, 'utf-8'));
+        console.log('\n📋 当前已配置的账号:');
+        console.log('─'.repeat(50));
+
+        if (!accounts.accounts || accounts.accounts.length === 0) {
+            console.log('  (无)');
+        } else {
+            accounts.accounts.forEach((acc, i) => {
+                const status = acc.status === 'active' ? '🟢' : '🔴';
+                console.log(`  ${i + 1}. ${status} ${acc.email || acc.name} [${acc.id}]`);
+            });
+        }
+        console.log('─'.repeat(50));
+    } catch (e) {
+        console.log('\n⚠️ 无法读取账号配置');
+    }
+}
+
+/**
+ * 读取用户输入
+ */
+function readline(question) {
+    return new Promise((resolve) => {
+        const rl = require('readline').createInterface({
+            input: process.stdin,
+            output: process.stdout
+        });
+        rl.question(question, (answer) => {
+            rl.close();
+            resolve(answer);
+        });
+    });
+}
+
+/**
+ * 主流程
+ */
+async function addAccount() {
+    console.log('═'.repeat(50));
+    console.log('  🔐 OAuth 账号授权工具');
+    console.log('═'.repeat(50));
+
+    try {
+        // 1. 请求设备授权码
+        const deviceAuth = await requestDeviceCode();
+
+        console.log('\n📱 请在浏览器中完成授权:');
+        console.log('─'.repeat(50));
+        console.log(`  验证码: ${deviceAuth.user_code}`);
+        console.log(`  链接: ${deviceAuth.verification_uri_complete || deviceAuth.verification_uri}`);
+        console.log('─'.repeat(50));
+
+        // 2. 尝试自动打开浏览器
+        const browserOpened = await openBrowser(
+            deviceAuth.verification_uri_complete || deviceAuth.verification_uri
+        );
+
+        if (browserOpened) {
+            console.log('\n🌐 已自动打开浏览器，请完成登录...');
+        } else {
+            console.log('\n👆 请复制上面的链接到浏览器打开');
+        }
+
+        // 3. 轮询获取 token
+        console.log('\n⏳ 等待授权中');
+        const tokenData = await pollForToken(deviceAuth.device_code);
+
+        // 4. 保存账号
+        const accounts = saveAccount(tokenData);
+
+        console.log(`\n🎉 授权成功！当前共有 ${accounts.accounts.length} 个账号`);
+
+        return true;
+
+    } catch (error) {
+        console.error(`\n❌ 错误: ${error.message}`);
+        return false;
+    }
+}
+
+/**
+ * 入口函数
+ */
+async function main() {
+    const args = process.argv.slice(2);
+    const loopMode = args.includes('--loop') || args.includes('-l');
+
+    // 显示当前状态
+    showAccountStatus();
+
+    do {
+        const success = await addAccount();
+
+        if (loopMode && success) {
+            console.log('\n━'.repeat(50));
+            console.log('按 Enter 继续添加下一个账号，或输入 q 退出');
+
+            // 等待用户输入
+            const readlineModule = await import('readline');
+            const rl = readlineModule.createInterface({
+                input: process.stdin,
+                output: process.stdout
+            });
+
+            const answer = await new Promise(resolve => {
+                rl.question('> ', (ans) => {
+                    rl.close();
+                    resolve(ans);
+                });
+            });
+
+            if (answer.toLowerCase() === 'q') {
+                break;
+            }
+        } else if (!loopMode) {
+            break;
+        }
+    } while (loopMode);
+
+    // 显示最终状态
+    showAccountStatus();
+    console.log('\n✨ 完成！');
+}
+
+// 运行
+main().catch(console.error);
diff --git a/auth.js b/auth.js
index fed0395..c9c4d93 100644
--- a/auth.js
+++ b/auth.js
@@ -4,15 +4,18 @@ import os from 'os';
 import fetch from 'node-fetch';
 import { logDebug, logError, logInfo } from './logger.js';
 import { getNextProxyAgent } from './proxy-manager.js';
+import { getAccountManager, initializeAccountManager } from './account-manager.js';
 
 // State management for API key and refresh
 let currentApiKey = null;
 let currentRefreshToken = null;
 let lastRefreshTime = null;
 let clientId = null;
-let authSource = null; // 'env' or 'file' or 'factory_key' or 'client'
+let authSource = null; // 'env' or 'file' or 'factory_key' or 'client' or 'multi_account'
 let authFilePath = null;
 let factoryApiKey = null; // From FACTORY_API_KEY environment variable
+let multiAccountMode = false; // 是否启用多账号模式
+let lastSelectedAccountId = null; // 记录最后选择的账号ID，用于结果回调
 
 const REFRESH_URL = 'https://api.workos.com/user_management/authenticate';
 const REFRESH_INTERVAL_HOURS = 6; // Refresh every 6 hours
@@ -27,10 +30,10 @@ const TOKEN_VALID_HOURS = 8; // Token valid for 8 hours
 function generateULID() {
   // Crockford's Base32 alphabet (no I, L, O, U to avoid confusion)
   const ENCODING = '0123456789ABCDEFGHJKMNPQRSTVWXYZ';
-  
+
   // Get timestamp in milliseconds
   const timestamp = Date.now();
-  
+
   // Encode timestamp to 10 characters
   let time = '';
   let ts = timestamp;
@@ -39,14 +42,14 @@ function generateULID() {
     time = ENCODING[mod] + time;
     ts = Math.floor(ts / 32);
   }
-  
+
   // Generate 16 random characters
   let randomPart = '';
   for (let i = 0; i < 16; i++) {
     const rand = Math.floor(Math.random() * 32);
     randomPart += ENCODING[rand];
   }
-  
+
   return time + randomPart;
 }
 
@@ -60,10 +63,31 @@ function generateClientId() {
 
 /**
  * Load auth configuration with priority system
- * Priority: FACTORY_API_KEY > refresh token mechanism > client authorization
+ * Priority: accounts.json (multi-account) > FACTORY_API_KEY > refresh token mechanism > client authorization
  */
 function loadAuthConfig() {
-  // 1. Check FACTORY_API_KEY environment variable (highest priority)
+  // 0. Check accounts.json for multi-account mode (highest priority)
+  const accountsPath = path.join(process.cwd(), 'accounts.json');
+  try {
+    if (fs.existsSync(accountsPath)) {
+      const accountsContent = fs.readFileSync(accountsPath, 'utf-8');
+      const accountsData = JSON.parse(accountsContent);
+
+      if (accountsData.accounts && accountsData.accounts.length > 0) {
+        const activeAccounts = accountsData.accounts.filter(acc => acc.status === 'active');
+        if (activeAccounts.length > 0) {
+          logInfo(`Found accounts.json with ${activeAccounts.length} active account(s), enabling multi-account mode`);
+          multiAccountMode = true;
+          authSource = 'multi_account';
+          return { type: 'multi_account', value: accountsPath };
+        }
+      }
+    }
+  } catch (error) {
+    logError('Error reading accounts.json', error);
+  }
+
+  // 1. Check FACTORY_API_KEY environment variable
   const factoryKey = process.env.FACTORY_API_KEY;
   if (factoryKey && factoryKey.trim() !== '') {
     logInfo('Using fixed API key from FACTORY_API_KEY environment variable');
@@ -84,22 +108,22 @@ function loadAuthConfig() {
   // 3. Check ~/.factory/auth.json
   const homeDir = os.homedir();
   const factoryAuthPath = path.join(homeDir, '.factory', 'auth.json');
-  
+
   try {
     if (fs.existsSync(factoryAuthPath)) {
       const authContent = fs.readFileSync(factoryAuthPath, 'utf-8');
       const authData = JSON.parse(authContent);
-      
+
       if (authData.refresh_token && authData.refresh_token.trim() !== '') {
         logInfo('Using refresh token from ~/.factory/auth.json');
         authSource = 'file';
         authFilePath = factoryAuthPath;
-        
+
         // Also load access_token if available
         if (authData.access_token) {
           currentApiKey = authData.access_token.trim();
         }
-        
+
         return { type: 'refresh', value: authData.refresh_token.trim() };
       }
     }
@@ -156,7 +180,7 @@ async function refreshApiKey() {
     }
 
     const data = await response.json();
-    
+
     // Update tokens
     currentApiKey = data.access_token;
     currentRefreshToken = data.refresh_token;
@@ -240,7 +264,18 @@ export async function initializeAuth() {
   try {
     const authConfig = loadAuthConfig();
 
-    if (authConfig.type === 'factory_key') {
+    if (authConfig.type === 'multi_account') {
+      // Multi-account mode - initialize AccountManager
+      const loaded = await initializeAccountManager();
+      if (loaded) {
+        const manager = getAccountManager();
+        logInfo(`Auth system initialized with multi-account mode (${manager.getAccountCount()} accounts)`);
+      } else {
+        logError('Failed to initialize AccountManager, falling back to client authorization');
+        authSource = 'client';
+        multiAccountMode = false;
+      }
+    } else if (authConfig.type === 'factory_key') {
       // Using fixed FACTORY_API_KEY, no refresh needed
       logInfo('Auth system initialized with fixed API key');
     } else if (authConfig.type === 'refresh') {
@@ -275,11 +310,21 @@ export async function initializeAuth() {
  * @param {string} clientAuthorization - Authorization header from client request (optional)
  */
 export async function getApiKey(clientAuthorization = null) {
+  // Priority 0: Multi-account mode
+  if (authSource === 'multi_account' && multiAccountMode) {
+    const manager = getAccountManager();
+    const account = manager.selectAccount();
+    lastSelectedAccountId = account.id;
+
+    const accessToken = await manager.getAccessToken(account);
+    return `Bearer ${accessToken}`;
+  }
+
   // Priority 1: FACTORY_API_KEY environment variable
   if (authSource === 'factory_key' && factoryApiKey) {
     return `Bearer ${factoryApiKey}`;
   }
-  
+
   // Priority 2: Refresh token mechanism
   if (authSource === 'env' || authSource === 'file') {
     // Check if we need to refresh
@@ -294,13 +339,45 @@ export async function getApiKey(clientAuthorization = null) {
 
     return `Bearer ${currentApiKey}`;
   }
-  
+
   // Priority 3: Client authorization header
   if (clientAuthorization) {
     logDebug('Using client authorization header');
     return clientAuthorization;
   }
-  
+
   // No authorization available
-  throw new Error('No authorization available. Please configure FACTORY_API_KEY, refresh token, or provide client authorization.');
+  throw new Error('No authorization available. Please configure accounts.json, FACTORY_API_KEY, refresh token, or provide client authorization.');
 }
+
+/**
+ * Record authentication result for multi-account mode
+ * @param {string} endpoint - The API endpoint called
+ * @param {boolean} success - Whether the request was successful
+ * @param {number} statusCode - HTTP status code
+ */
+export function recordAuthResult(endpoint, success, statusCode) {
+  if (authSource === 'multi_account' && multiAccountMode && lastSelectedAccountId) {
+    const manager = getAccountManager();
+    manager.recordResult(lastSelectedAccountId, endpoint, success, statusCode);
+  }
+}
+
+/**
+ * Get auth status for /status endpoint
+ */
+export function getAuthStatus() {
+  if (authSource === 'multi_account' && multiAccountMode) {
+    const manager = getAccountManager();
+    return {
+      mode: 'multi_account',
+      ...manager.getStatus()
+    };
+  }
+
+  return {
+    mode: authSource,
+    multiAccountMode: false
+  };
+}
+
diff --git a/sync-accounts.sh b/sync-accounts.sh
new file mode 100755
index 0000000..4f3c212
--- /dev/null
+++ b/sync-accounts.sh
@@ -0,0 +1,190 @@
+#!/bin/bash
+#
+# sync-accounts.sh - 账号配置增量同步脚本
+#
+# 用途：从本地机器增量同步 accounts.json 到远程无头服务器
+#
+# 使用方式：
+#   ./sync-accounts.sh                    # 使用默认配置
+#   ./sync-accounts.sh user@server.com    # 指定服务器
+#   ./sync-accounts.sh user@server.com /path/to/droid2api  # 指定路径
+#
+# 前置要求：
+#   1. 配置 SSH 免密登录：ssh-copy-id user@server.com
+#   2. 远程服务器安装 jq：apt install jq 或 yum install jq
+#
+
+set -e
+
+# ========== 配置区域 ==========
+# 可以修改这些默认值，或通过命令行参数覆盖
+DEFAULT_SERVER="user@your-server.com"
+DEFAULT_REMOTE_PATH="/opt/droid2api"
+LOCAL_FILE="accounts.json"
+
+# 部署方式: pm2 | docker | docker-compose | none
+DEPLOY_TYPE="${DEPLOY_TYPE:-docker-compose}"
+DOCKER_SERVICE_NAME="${DOCKER_SERVICE_NAME:-droid2api}"
+PM2_APP_NAME="${PM2_APP_NAME:-droid2api}"
+# ==============================
+
+# 颜色输出
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+NC='\033[0m' # No Color
+
+log_info() { echo -e "${BLUE}[INFO]${NC} $1"; }
+log_success() { echo -e "${GREEN}[OK]${NC} $1"; }
+log_warn() { echo -e "${YELLOW}[WARN]${NC} $1"; }
+log_error() { echo -e "${RED}[ERROR]${NC} $1"; }
+
+# 解析命令行参数
+SERVER="${1:-$DEFAULT_SERVER}"
+REMOTE_PATH="${2:-$DEFAULT_REMOTE_PATH}"
+REMOTE_FILE="$REMOTE_PATH/accounts.json"
+
+# 显示帮助
+if [[ "$1" == "-h" || "$1" == "--help" ]]; then
+    echo "用法: $0 [user@server] [remote_path]"
+    echo ""
+    echo "环境变量:"
+    echo "  DEPLOY_TYPE       部署方式: pm2 | docker | docker-compose | none (默认: docker-compose)"
+    echo "  DOCKER_SERVICE_NAME  Docker 服务名 (默认: droid2api)"
+    echo "  PM2_APP_NAME      PM2 应用名 (默认: droid2api)"
+    echo ""
+    echo "示例:"
+    echo "  $0 root@192.168.1.100 /opt/droid2api"
+    echo "  DEPLOY_TYPE=pm2 $0 user@server.com"
+    exit 0
+fi
+
+echo ""
+echo "═══════════════════════════════════════════════════════════════"
+echo "  📦 账号配置增量同步工具"
+echo "═══════════════════════════════════════════════════════════════"
+echo ""
+
+# 检查本地文件是否存在
+if [[ ! -f "$LOCAL_FILE" ]]; then
+    log_error "本地文件 $LOCAL_FILE 不存在"
+    log_info "请先运行 'node add-account.js' 添加账号"
+    exit 1
+fi
+
+# 显示连接信息
+log_info "目标服务器: $SERVER"
+log_info "远程路径: $REMOTE_FILE"
+log_info "部署方式: $DEPLOY_TYPE"
+echo ""
+
+# 创建临时目录
+TEMP_DIR=$(mktemp -d)
+trap "rm -rf $TEMP_DIR" EXIT
+
+# Step 1: 下载远程现有配置
+log_info "正在获取远程现有配置..."
+if ssh "$SERVER" "test -f $REMOTE_FILE" 2>/dev/null; then
+    scp -q "$SERVER:$REMOTE_FILE" "$TEMP_DIR/remote_accounts.json"
+    REMOTE_COUNT=$(jq '.accounts | length' "$TEMP_DIR/remote_accounts.json" 2>/dev/null || echo 0)
+    log_success "远程现有 $REMOTE_COUNT 个账号"
+else
+    log_warn "远程配置不存在，将创建新文件"
+    echo '{"accounts":[],"settings":{}}' > "$TEMP_DIR/remote_accounts.json"
+    REMOTE_COUNT=0
+fi
+
+# Step 2: 显示本地账号数量
+LOCAL_COUNT=$(jq '.accounts | length' "$LOCAL_FILE")
+log_info "本地现有 $LOCAL_COUNT 个账号"
+
+# Step 3: 合并配置（按 email 去重，本地优先）
+log_info "正在合并配置..."
+jq -s '
+  # 使用第一个文件(远程)的 accounts 作为基础
+  (.[0].accounts // []) as $remote |
+  # 使用第二个文件(本地)的 accounts
+  (.[1].accounts // []) as $local |
+  # 获取远程账号的 email 列表
+  ($remote | map(.email)) as $remote_emails |
+  # 过滤出本地新增的账号（email 不在远程列表中的）
+  ($local | map(select(.email as $e | $remote_emails | index($e) | not))) as $new_local |
+  # 更新远程已存在的账号（用本地数据覆盖同 email 的远程账号）
+  ($remote | map(
+    . as $r |
+    ($local | map(select(.email == $r.email)) | .[0]) as $l |
+    if $l then $l else $r end
+  )) as $updated_remote |
+  # 合并：更新后的远程 + 本地新增
+  {
+    accounts: ($updated_remote + $new_local),
+    settings: (.[1].settings // .[0].settings // {}),
+    last_updated: (now | strftime("%Y-%m-%dT%H:%M:%SZ"))
+  }
+' "$TEMP_DIR/remote_accounts.json" "$LOCAL_FILE" > "$TEMP_DIR/merged_accounts.json"
+
+MERGED_COUNT=$(jq '.accounts | length' "$TEMP_DIR/merged_accounts.json")
+NEW_COUNT=$((MERGED_COUNT - REMOTE_COUNT))
+
+if [[ $NEW_COUNT -gt 0 ]]; then
+    log_success "新增 $NEW_COUNT 个账号，合并后共 $MERGED_COUNT 个账号"
+else
+    log_info "无新增账号，共 $MERGED_COUNT 个账号"
+fi
+
+# Step 4: 显示账号列表
+echo ""
+log_info "合并后的账号列表:"
+echo "──────────────────────────────────────────────────────────────"
+jq -r '.accounts[] | "  \(.status == "active" | if . then "🟢" else "🔴" end) \(.email // .name) [\(.id)]"' "$TEMP_DIR/merged_accounts.json"
+echo "──────────────────────────────────────────────────────────────"
+echo ""
+
+# Step 5: 确认上传
+read -p "确认上传到服务器? (y/N) " -n 1 -r
+echo ""
+if [[ ! $REPLY =~ ^[Yy]$ ]]; then
+    log_warn "已取消"
+    exit 0
+fi
+
+# Step 6: 上传合并后的配置
+log_info "正在上传配置..."
+scp -q "$TEMP_DIR/merged_accounts.json" "$SERVER:$REMOTE_FILE"
+log_success "配置已上传"
+
+# Step 7: 重启服务（根据部署方式）
+echo ""
+case "$DEPLOY_TYPE" in
+    pm2)
+        log_info "正在重启 PM2 服务..."
+        ssh "$SERVER" "pm2 restart $PM2_APP_NAME" 2>/dev/null && \
+            log_success "PM2 服务已重启" || \
+            log_warn "PM2 重启失败，请手动重启"
+        ;;
+    docker)
+        log_info "正在重启 Docker 容器..."
+        ssh "$SERVER" "docker restart $DOCKER_SERVICE_NAME" 2>/dev/null && \
+            log_success "Docker 容器已重启" || \
+            log_warn "Docker 重启失败，请手动重启"
+        ;;
+    docker-compose)
+        log_info "正在重启 Docker Compose 服务..."
+        ssh "$SERVER" "cd $REMOTE_PATH && docker-compose restart" 2>/dev/null && \
+            log_success "Docker Compose 服务已重启" || \
+            log_warn "Docker Compose 重启失败，请手动重启"
+        ;;
+    none)
+        log_warn "已跳过服务重启，请手动重启服务以生效"
+        ;;
+    *)
+        log_warn "未知的部署方式: $DEPLOY_TYPE，请手动重启服务"
+        ;;
+esac
+
+echo ""
+echo "═══════════════════════════════════════════════════════════════"
+log_success "同步完成！"
+echo "═══════════════════════════════════════════════════════════════"
+echo ""