diff --git a/lib/yuque.js b/lib/yuque.js
index dad16d8..e725c2e 100644
--- a/lib/yuque.js
+++ b/lib/yuque.js
@@ -3,7 +3,11 @@ const url = require('url')
 const wfetch = require('./fetch')
 const store = require('./store')
 const { hash, logger, chalk } = require('@vuepress/shared-utils')
-const Yuque = require('./yuque')
+const { PACKAGE_NAME } = require('./constant')
+const debug = require('debug')(`${PACKAGE_NAME}:yuque`)
+
+const AUTH_TOKEN = process.env.YUQUE_QUTH_TOKEN
+const SKIP_CACHE = process.env.SKIP_CACHE
 
 let instance
 let repoId
@@ -14,28 +18,39 @@ module.exports = class Yuque {
   }
 
   static getInstance() {
-    if (instance) {
-      return instance
+    if (!instance) {
+      instance = new Yuque(repoId)
     }
-    return new Yuque(repoId)
+    return instance
   }
 
   static async fetch(url, options = {}) {
+    debug('fetch', url, 'with', JSON.stringify(options, null, 2))
     const { useCache = true } = options
-    const yuque = Yuque.getInstance()
-    const { store } = yuque
     const key = hash(url + JSON.stringify(options))
     const cacheKey = `fetch.${key}`
-
-    if (useCache && store.get(cacheKey)) {
-      logger.debug(`Using cache for ${chalk.yellow(url)}`)
-      return store.get(cacheKey)
+    let yuque
+
+    if (repoId && useCache && !SKIP_CACHE) {
+      yuque = Yuque.getInstance()
+      const cached = yuque.store.get(cacheKey)
+      if (cached) {
+        debug(`Using cache for ${chalk.yellow(url)}`)
+        return cached
+      }
     }
 
     let response
+    const foptions = {}
+    if (AUTH_TOKEN) {
+      foptions.headers = {
+        'X-Auth-Token': AUTH_TOKEN
+      }
+    }
+
     try {
-      response = await wfetch(url, options)
-      store.set(cacheKey, response)
+      response = await wfetch(url, foptions)
+      yuque && yuque.store.set(cacheKey, response)
       return response
     } catch (e) {
       return e