diff --git a/package.json b/package.json
index 51cf823a9..aef3a1bf4 100644
--- a/package.json
+++ b/package.json
@@ -11,6 +11,7 @@
   "scripts": {
     "config": "node ./init.js",
     "start": "node ./built/index.js",
+    "swagger": "node ./swagger.js",
     "build": "gulp build",
     "rebuild": "gulp rebuild",
     "clean": "gulp clean",
@@ -124,6 +125,7 @@
     "sortablejs": "1.5.0-rc1",
     "subdomain": "1.2.0",
     "summaly": "1.2.7",
+    "swagger-jsdoc": "^1.8.4",
     "syuilo-password-strength": "0.0.1",
     "syuilo-transformify": "0.1.2",
     "tcp-port-used": "0.1.2",
diff --git a/src/api/endpoints/app/create.js b/src/api/endpoints/app/create.js
index d83062c8e..9ce98b197 100644
--- a/src/api/endpoints/app/create.js
+++ b/src/api/endpoints/app/create.js
@@ -7,6 +7,59 @@ import rndstr from 'rndstr';
 import App from '../../models/app';
 import serialize from '../../serializers/app';
 
+/**
+ * @swagger
+ * /app/create:
+ *   post:
+ *     summary: Create an application
+ *     parameters:
+ *       - $ref: "#/parameters/AccessToken"
+ *       -
+ *         name: name_id
+ *         description: Application unique name
+ *         in: formData
+ *         required: true
+ *         type: string
+ *       -
+ *         name: name
+ *         description: Application name
+ *         in: formData
+ *         required: true
+ *         type: string
+ *       -
+ *         name: description
+ *         description: Application description
+ *         in: formData
+ *         required: true
+ *         type: string
+ *       -
+ *         name: permission
+ *         description: Permissions that application has
+ *         in: formData
+ *         required: true
+ *         type: array
+ *         items:
+ *           type: string
+ *           collectionFormat: csv
+ *       -
+ *         name: callback_url
+ *         description: URL called back after authentication
+ *         in: formData
+ *         required: false
+ *         type: string
+ *       
+ *     responses:
+ *       200:
+ *         description: Created application's information
+ *         schema:
+ *           $ref: "#/definitions/Application"
+ *       
+ *       default:
+ *         description: Failed
+ *         schema:
+ *           $ref: "#/definitions/Error"
+ */
+
 /**
  * Create an app
  *
diff --git a/src/api/endpoints/app/name_id/available.js b/src/api/endpoints/app/name_id/available.js
index 179925dce..e101e0637 100644
--- a/src/api/endpoints/app/name_id/available.js
+++ b/src/api/endpoints/app/name_id/available.js
@@ -5,6 +5,35 @@
  */
 import App from '../../../models/app';
 
+/**
+ * @swagger
+ * /app/name_id/available:
+ *   post:
+ *     summary: Check available name_id on creation an application
+ *     parameters:
+ *       -
+ *         name: name_id
+ *         description: Application unique name
+ *         in: formData
+ *         required: true
+ *         type: string
+ *     
+ *     responses:
+ *       200:
+ *         description: Success
+ *         schema:
+ *           type: object
+ *           properties:
+ *             available:
+ *               description: Whether name_id is available
+ *               type: boolean
+ *         
+ *       default:
+ *         description: Failed
+ *         schema:
+ *           $ref: "#/definitions/Error"
+ */
+
 /**
  * Check available name_id of app
  *
diff --git a/src/api/endpoints/app/show.js b/src/api/endpoints/app/show.js
index 8d12f9aeb..2b651d53a 100644
--- a/src/api/endpoints/app/show.js
+++ b/src/api/endpoints/app/show.js
@@ -7,6 +7,36 @@ import * as mongo from 'mongodb';
 import App from '../../models/app';
 import serialize from '../../serializers/app';
 
+/**
+ * @swagger
+ * /app/show:
+ *   post:
+ *     summary: Show an application's information
+ *     description: Require app_id or name_id
+ *     parameters:
+ *       -
+ *         name: app_id
+ *         description: Application ID
+ *         in: formData
+ *         type: string
+ *       -
+ *         name: name_id
+ *         description: Application unique name
+ *         in: formData
+ *         type: string
+ *         
+ *     responses:
+ *       200:
+ *         description: Success
+ *         schema:
+ *           $ref: "#/definitions/Application"
+ *           
+ *       default:
+ *         description: Failed
+ *         schema:
+ *           $ref: "#/definitions/Error"
+ */
+
 /**
  * Show an app
  *
diff --git a/src/api/endpoints/auth/accept.js b/src/api/endpoints/auth/accept.js
index 110a0897d..131a0e561 100644
--- a/src/api/endpoints/auth/accept.js
+++ b/src/api/endpoints/auth/accept.js
@@ -9,6 +9,29 @@ import App from '../../models/app';
 import AuthSess from '../../models/auth-session';
 import AccessToken from '../../models/access-token';
 
+/**
+ * @swagger
+ * /auth/accept:
+ *   post:
+ *     summary: Accept a session
+ *     parameters:
+ *       - $ref: "#/parameters/NativeToken"
+ *       - 
+ *         name: token
+ *         description: Session Token
+ *         in: formData
+ *         required: true
+ *         type: string
+ *     responses:
+ *       204:
+ *         description: OK
+ *       
+ *       default:
+ *         description: Failed
+ *         schema:
+ *           $ref: "#/definitions/Error"
+ */
+
 /**
  * Accept
  *
diff --git a/src/api/endpoints/auth/session/generate.js b/src/api/endpoints/auth/session/generate.js
index bb49cf090..f67209eee 100644
--- a/src/api/endpoints/auth/session/generate.js
+++ b/src/api/endpoints/auth/session/generate.js
@@ -7,6 +7,37 @@ import * as uuid from 'uuid';
 import App from '../../../models/app';
 import AuthSess from '../../../models/auth-session';
 
+/**
+ * @swagger
+ * /auth/session/generate:
+ *   post:
+ *     summary: Generate a session
+ *     parameters:
+ *       -
+ *         name: app_secret
+ *         description: App Secret
+ *         in: formData
+ *         required: true
+ *         type: string
+ *         
+ *     responses:
+ *       200:
+ *         description: OK
+ *         schema:
+ *           type: object
+ *           properties:
+ *             token:
+ *               type: string
+ *               description: Session Token
+ *             url:
+ *               type: string
+ *               description: Authentication form's URL
+ *       default:
+ *         description: Failed
+ *         schema:
+ *           $ref: "#/definitions/Error"
+ */
+
 /**
  * Generate a session
  *
diff --git a/src/api/endpoints/auth/session/show.js b/src/api/endpoints/auth/session/show.js
index 67160c699..e161d9e57 100644
--- a/src/api/endpoints/auth/session/show.js
+++ b/src/api/endpoints/auth/session/show.js
@@ -6,6 +6,46 @@
 import AuthSess from '../../../models/auth-session';
 import serialize from '../../../serializers/auth-session';
 
+/**
+ * @swagger
+ * /auth/session/show:
+ *   post:
+ *     summary: Show a session information
+ *     parameters:
+ *       -
+ *         name: token
+ *         description: Session Token
+ *         in: formData
+ *         required: true
+ *         type: string
+ *         
+ *     responses:
+ *       200:
+ *         description: OK
+ *         schema: 
+ *           type: object
+ *           properties:
+ *             created_at:
+ *               type: string
+ *               format: date-time
+ *               description: Date and time of the session creation
+ *             app_id:
+ *               type: string
+ *               description: Application ID
+ *             token:
+ *               type: string
+ *               description: Session Token
+ *             user_id:
+ *               type: string
+ *               description: ID of user who create the session
+ *             app:
+ *               $ref: "#/definitions/Application"
+ *       default:
+ *         description: Failed
+ *         schema:
+ *           $ref: "#/definitions/Error"
+ */
+
 /**
  * Show a session
  *
diff --git a/src/api/endpoints/auth/session/userkey.js b/src/api/endpoints/auth/session/userkey.js
index f85a720ea..9905d7d84 100644
--- a/src/api/endpoints/auth/session/userkey.js
+++ b/src/api/endpoints/auth/session/userkey.js
@@ -8,6 +8,42 @@ import AuthSess from '../../../models/auth-session';
 import AccessToken from '../../../models/access-token';
 import serialize from '../../../serializers/user';
 
+/**
+ * @swagger
+ * /auth/session/userkey:
+ *   post:
+ *     summary: Get a access token(userkey)
+ *     parameters:
+ *       -
+ *         name: app_secret
+ *         description: App Secret
+ *         in: formData
+ *         required: true
+ *         type: string
+ *       -
+ *         name: token
+ *         description: Session Token
+ *         in: formData
+ *         required: true
+ *         type: string
+ *     
+ *     responses:
+ *       200:
+ *         description: OK
+ *         schema:
+ *           type: object
+ *           properties:
+ *             userkey:
+ *               type: string
+ *               description: Access Token
+ *             user:
+ *               $ref: "#/definitions/User"
+ *       default:
+ *         description: Failed
+ *         schema:
+ *           $ref: "#/definitions/Error"
+ */
+
 /**
  * Generate a session
  *
diff --git a/src/api/endpoints/meta.js b/src/api/endpoints/meta.js
index acbe43a54..88e7f64dd 100644
--- a/src/api/endpoints/meta.js
+++ b/src/api/endpoints/meta.js
@@ -6,6 +6,33 @@
 import prominence from 'prominence';
 import git from 'git-last-commit';
 
+/**
+ * @swagger
+ * /meta:
+ *   post:
+ *     summary: Show the misskey's information
+ *     responses:
+ *       200:
+ *         description: Success
+ *         schema:
+ *           type: object
+ *           properties:
+ *             maintainer:
+ *               description: maintainer's name
+ *               type: string
+ *             commit:
+ *               description: latest commit's hash
+ *               type: string
+ *             secure: 
+ *               description: whether the server supports secure protcols
+ *               type: boolean
+ *               
+ *       default:
+ *         description: Failed
+ *         schema:
+ *           $ref: "#/definitions/Error"
+ */
+
 /**
  * Show core info
  *
diff --git a/swagger.js b/swagger.js
new file mode 100644
index 000000000..0cfd2fff0
--- /dev/null
+++ b/swagger.js
@@ -0,0 +1,229 @@
+'use strict'
+
+const swaggerJSDoc = require('swagger-jsdoc');
+const fs = require('fs');
+const yaml = require('js-yaml');
+
+const apiRoot = './src/api/endpoints';
+const files = [
+  'meta.js',
+  //app
+  'app/show.js',
+  'app/create.js',
+  'app/name_id/available.js',
+  //auth
+  'auth/accept.js',
+  //auth/session
+  'auth/session/generate.js',
+  'auth/session/show.js',
+  'auth/session/userkey.js',
+];
+
+const defaultSwagger = {
+  "swagger": "2.0",
+  "info": {
+    "title": "Misskey API",
+    "version": "aoi"
+  },
+  "host": "api.misskey.xyz",
+  "schemes": [
+    "https"
+  ],
+  "consumes": [
+    "application/x-www-form-urlencoded"
+  ],
+  "produces": [
+    "application/json"
+  ],
+
+  "parameters": {
+    "AccessToken": {
+      "name": "i",
+      "description": "Access Token",
+      "in": "formData",
+      "required": true,
+      "type": "string"
+    },
+
+    "NativeToken": {
+      "name": "i",
+      "description": "Native Access Token",
+      "in": "formData",
+      "required": true,
+      "type": "string",
+      "pattern": "^\!.+"
+    }
+  },
+
+  "definitions": {
+    "Error": {
+      "type": "object",
+      "properties": {
+        "error": {
+          "type": "string",
+          "description": "Error message"
+        }
+      }
+    },
+    "User": {
+      "type": "object",
+      "required": [
+        "created_at",
+        "followers_count",
+        "following_count",
+        "id",
+        "liked_count",
+        "likes_count",
+        "name",
+        "posts_count",
+        "username"
+      ],
+      "properties": {
+        "avatar_id": {
+          "type": "string",
+          "description": "アバターに設定しているドライブのファイルのID"
+        },
+        "avatar_url": {
+          "type": "string",
+          "description": "アバターURL"
+        },
+        "banner_id": {
+          "type": "string",
+          "description": "バナーに設定しているドライブのファイルのID"
+        },
+        "banner_url": {
+          "type": "string",
+          "description": "バナーURL"
+        },
+        "bio": {
+          "type": "string",
+          "description": "プロフィール"
+        },
+        "birthday": {
+          "type": "string",
+          "format": "date",
+          "description": "誕生日"
+        },
+        "created_at": {
+          "type": "string",
+          "format": "date-time",
+          "description": "アカウント作成日時"
+        },
+        "drive_capacity": {
+          "type": "integer",
+          "description": "ドライブの最大容量"
+        },
+        "followers_count": {
+          "type": "integer",
+          "description": "フォロワー数"
+        },
+        "following_count": {
+          "type": "integer",
+          "description": "フォロー数"
+        },
+        "id": {
+          "type": "string",
+          "description": "ユーザーID"
+        },
+        "is_followed": {
+          "type": "boolean",
+          "description": "フォローされているか"
+        },
+        "is_following": {
+          "type": "boolean",
+          "description": "フォローしているか"
+        },
+        "liked_count": {
+          "type": "integer",
+          "description": "投稿にいいねされた数"
+        },
+        "likes_count": {
+          "type": "integer",
+          "description": "投稿にいいねした数"
+        },
+        "location": {
+          "type": "string",
+          "description": "場所"
+        },
+        "name": {
+          "type": "string",
+          "description": "ニックネーム"
+        },
+        "posts_count": {
+          "type": "integer",
+          "description": "投稿数"
+        },
+        "username": {
+          "type": "string",
+          "description": "ユーザー名"
+        }
+      }
+    },
+    "Application": {
+      "type": "object",
+      "properties": {
+        "created_at": {
+          "type": "string",
+          "format": "date-time",
+          "description": "アプリケーションの作成日時"
+        },
+        "user_id": {
+          "type": "string",
+          "description": "アプリケーションを作成したユーザーのID"
+        },
+        "name": {
+          "type": "string",
+          "description": "アプリケーションの名前"
+        },
+        "name_id": {
+          "type": "string",
+          "description": "アプリケーションのユニークな名前"
+        },
+        "description": {
+          "type": "string",
+          "description": "アプリケーションの説明"
+        },
+        "permission": {
+          "type": "array",
+          "items": {
+            "type": "string"
+          },
+          "description": "アプリケーションの持つ権限一覧"
+        },
+        "callback_url": {
+          "type": "string",
+          "description": "コールバックURL"
+        },
+        "id": {
+          "type": "string",
+          "description": "アプリケーションID"
+        },
+        "icon_url": {
+          "type": "string",
+          "description": "アプリケーションのアイコンのURL"
+        }
+      }
+    }
+  },
+  "securityDefinitions": {},
+  "tags": []
+};
+
+var options = {
+  swaggerDefinition: defaultSwagger,
+  apis: []
+};
+options.apis = files.map(c => {return `${apiRoot}/${c}`;});
+
+if(fs.existsSync('.config/config.yml')){
+  var config = yaml.safeLoad(fs.readFileSync('./.config/config.yml', 'utf8'));
+  options.swaggerDefinition.host = `api.${config.url.match(/\:\/\/(.+)$/)[1]}`;
+  options.swaggerDefinition.schemes = config.https.enable ? 
+                                      ['https'] : 
+                                      ['http'];
+}
+
+var swaggerSpec = swaggerJSDoc(options);
+
+fs.writeFileSync('api-docs.json', JSON.stringify(swaggerSpec));
+