diff --git a/package-lock.json b/package-lock.json
index 65591de..a5adaf0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,6 +11,7 @@
       "dependencies": {
         "express": "^4.19.2",
         "misskey-js": "^2024.5.0",
+        "node-fetch": "^3.3.2",
         "uuid": "^10.0.0"
       }
     },
@@ -121,6 +122,15 @@
       "integrity": "sha512-QADzlaHc8icV8I7vbaJXJwod9HWYp8uCqf1xa4OfNu1T7JVxQIrUgOWtHdNDtPiywmFbiS12VjotIXLrKM3orQ==",
       "license": "MIT"
     },
+    "node_modules/data-uri-to-buffer": {
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/data-uri-to-buffer/-/data-uri-to-buffer-4.0.1.tgz",
+      "integrity": "sha512-0R9ikRb668HB7QDxT1vkpuUBtqc53YyAwMwGeUFKRojY/NWKvdZ+9UYtRfGmhqNbRkTSVpMbmyhXipFFv2cb/A==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 12"
+      }
+    },
     "node_modules/debug": {
       "version": "2.6.9",
       "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
@@ -265,6 +275,29 @@
         "node": ">= 0.10.0"
       }
     },
+    "node_modules/fetch-blob": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/fetch-blob/-/fetch-blob-3.2.0.tgz",
+      "integrity": "sha512-7yAQpD2UMJzLi1Dqv7qFYnPbaPx7ZfFK6PiIxQ4PfkGPyNyl2Ugx+a/umUonmKqjhM4DnfbMvdX6otXq83soQQ==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/jimmywarting"
+        },
+        {
+          "type": "paypal",
+          "url": "https://paypal.me/jimmywarting"
+        }
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "node-domexception": "^1.0.0",
+        "web-streams-polyfill": "^3.0.3"
+      },
+      "engines": {
+        "node": "^12.20 || >= 14.13"
+      }
+    },
     "node_modules/finalhandler": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-1.2.0.tgz",
@@ -283,6 +316,18 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/formdata-polyfill": {
+      "version": "4.0.10",
+      "resolved": "https://registry.npmjs.org/formdata-polyfill/-/formdata-polyfill-4.0.10.tgz",
+      "integrity": "sha512-buewHzMvYL29jdeQTVILecSaZKnt/RJWjoZCF5OW60Z67/GmSLBkOFM7qh1PI3zFNtJbaZL5eQu1vLfazOwj4g==",
+      "license": "MIT",
+      "dependencies": {
+        "fetch-blob": "^3.1.2"
+      },
+      "engines": {
+        "node": ">=12.20.0"
+      }
+    },
     "node_modules/forwarded": {
       "version": "0.2.0",
       "resolved": "https://registry.npmjs.org/forwarded/-/forwarded-0.2.0.tgz",
@@ -514,6 +559,43 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/node-domexception": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/node-domexception/-/node-domexception-1.0.0.tgz",
+      "integrity": "sha512-/jKZoMpw0F8GRwl4/eLROPA3cfcXtLApP0QzLmUT/HuPCZWyB7IY9ZrMeKw2O/nFIqPQB3PVM9aYm0F312AXDQ==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/jimmywarting"
+        },
+        {
+          "type": "github",
+          "url": "https://paypal.me/jimmywarting"
+        }
+      ],
+      "license": "MIT",
+      "engines": {
+        "node": ">=10.5.0"
+      }
+    },
+    "node_modules/node-fetch": {
+      "version": "3.3.2",
+      "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-3.3.2.tgz",
+      "integrity": "sha512-dRB78srN/l6gqWulah9SrxeYnxeddIG30+GOqK/9OlLVyLg3HPnr6SqOWTWOXKRwC2eGYCkZ59NNuSgvSrpgOA==",
+      "license": "MIT",
+      "dependencies": {
+        "data-uri-to-buffer": "^4.0.0",
+        "fetch-blob": "^3.1.4",
+        "formdata-polyfill": "^4.0.10"
+      },
+      "engines": {
+        "node": "^12.20.0 || ^14.13.1 || >=16.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/node-fetch"
+      }
+    },
     "node_modules/object-inspect": {
       "version": "1.13.2",
       "resolved": "https://registry.npmjs.org/object-inspect/-/object-inspect-1.13.2.tgz",
@@ -793,6 +875,15 @@
       "engines": {
         "node": ">= 0.8"
       }
+    },
+    "node_modules/web-streams-polyfill": {
+      "version": "3.3.3",
+      "resolved": "https://registry.npmjs.org/web-streams-polyfill/-/web-streams-polyfill-3.3.3.tgz",
+      "integrity": "sha512-d2JWLCivmZYTSIoge9MsgFCZrt571BikcWGYkjC1khllbTeDlGqZ2D8vD8E/lJa8WGWbb7Plm8/XJYV7IJHZZw==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 8"
+      }
     }
   }
 }
diff --git a/package.json b/package.json
index a694d2e..6dcf90b 100644
--- a/package.json
+++ b/package.json
@@ -10,9 +10,11 @@
   "keywords": [],
   "author": "",
   "license": "ISC",
+  "type": "module",
   "dependencies": {
     "express": "^4.19.2",
     "misskey-js": "^2024.5.0",
+    "node-fetch": "^3.3.2",
     "uuid": "^10.0.0"
   }
 }
diff --git a/src/index.js b/src/index.js
index ee095c7..e4e00f5 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,8 +1,10 @@
-const uuid = require("uuid");
-const fs = require("fs");
-const path = require("path");
+import { v4 as uuidv4 } from 'uuid';
+import fs from 'fs';
+import path from 'node:path';
+import fetch from 'node-fetch';
+import express from 'express';
+import * as Misskey from 'misskey-js';
 
-const express = require("express");
 let app = express();
 let port = process.env.PORT || 4000;
 
@@ -15,7 +17,7 @@ let app_permission = config.app.permission;
 
 // https://misskey.io/miauth/c1f6d42b-468b-4fd2-8274-e58abdedef6f?name=MyApp&callback=https%3A%2F%2Fmyapp.example.com%2Fcallback&permission=write:notes,write:following,read:drive
 
-let session_id = uuid.v4();
+let session_id = uuidv4();
 let auth_url = `${host}/miauth/${session_id}?name=${app_name}&callback=${app_callback}&permission=${app_permission}`;
 let auth_status = 0;
 
@@ -31,20 +33,44 @@ app.get('/callback', function(req, res) {
 });
 
 async function check_auth_status() {
-    setInterval(() => {
-        console.log("Checking auth status...");
-
-        if(auth_status == 1) {
-            console.log("Bot has been authenticated");
-            clearInterval(check_auth_status);
-            return true;
-        }
-    }, 2000);
+    return await new Promise(resolve => {
+        const check = setInterval(() => {
+            console.log("Checking auth status...");
+    
+            if(auth_status == 1) {
+                console.log("Bot has been authenticated");
+                resolve(true);
+                clearInterval(check);
+                return true;
+            }
+        }, 2000);
+    });
 };
 
-async function get_access_token() {
+async function get_access_token(host, session_id) {
+    const response = await fetch(`${host}/api/miauth/${session_id}/check`, {
+        method: 'POST'
+    });
     
-}
+    const data = await response.json();
+
+    const res_status = data.ok;
+    const res_token = data.token;
+    
+
+    if(res_status) {
+        return res_token;
+    } else {
+        return false; // error occured
+    }
+};
+
+(async () => {
+    await check_auth_status()
+    let access_token = await get_access_token(host, session_id);
+
+    console.log(access_token);
+})();
 
 app.listen(port);
 console.log(`Callback URL: http://localhost:${port}/callback`);
\ No newline at end of file