diff --git a/packages/misskey-js/src/endpoints.ts b/packages/misskey-js/src/endpoints.ts
index fe0692733a..d6237b3dcf 100644
--- a/packages/misskey-js/src/endpoints.ts
+++ b/packages/misskey-js/src/endpoints.ts
@@ -1650,6 +1650,9 @@ export const endpoints = {
 			}
 		}],
 	},
+	'admin/show-user': {
+
+	},
 } as const satisfies { [x: string]: IEndpointMeta; };
 
 /**
diff --git a/packages/misskey-js/src/entities.ts b/packages/misskey-js/src/entities.ts
index 1f7b8db327..b1c6b7d6ac 100644
--- a/packages/misskey-js/src/entities.ts
+++ b/packages/misskey-js/src/entities.ts
@@ -1,3 +1,4 @@
+import { Serialized } from "schema-type";
 import { Packed } from "./schemas";
 
 export type ID = Packed<'Id'>;
@@ -6,21 +7,21 @@ export type DateString = string;
 type TODO = Record<string, any>;
 
 // NOTE: 極力この型を使うのは避け、UserLite か UserDetailed か明示するように
-export type User = Packed<'User'>;
+export type User = Serialized<Packed<'User'>>;
 
-export type UserLite = Packed<'UserLite'>;
-export type UserDetailed = Packed<'UserDetailed'>;
-export type UserList = Packed<'UserList'>;
-export type MeDetailed = Packed<'MeDetailed'>;
-export type DriveFile = Packed<'DriveFile'>;
-export type DriveFolder = Packed<'DriveFolder'>;
-export type GalleryPost = Packed<'GalleryPost'>;
-export type Note = Packed<'Note'>;
-export type NoteReaction = Packed<'NoteReaction'>;
-export type NoteFavorite = Packed<'NoteFavorite'>;
-export type Notification = Packed<'NotificationStrict'>;
-export type CustomEmoji = Packed<'EmojiSimple'> | Packed<'EmojiDetailed'>;
-export type Page = Packed<'Page'>;
+export type UserLite = Serialized<Packed<'UserLite'>>;
+export type UserDetailed = Serialized<Packed<'UserDetailed'>>;
+export type UserList = Serialized<Packed<'UserList'>>;
+export type MeDetailed = Serialized<Packed<'MeDetailed'>>;
+export type DriveFile = Serialized<Packed<'DriveFile'>>;
+export type DriveFolder = Serialized<Packed<'DriveFolder'>>;
+export type GalleryPost = Serialized<Packed<'GalleryPost'>>;
+export type Note = Serialized<Packed<'Note'>>;
+export type NoteReaction = Serialized<Packed<'NoteReaction'>>;
+export type NoteFavorite = Serialized<Packed<'NoteFavorite'>>;
+export type Notification = Serialized<Packed<'NotificationStrict'>>;
+export type CustomEmoji = Serialized<Packed<'EmojiSimple'> | Packed<'EmojiDetailed'>>;
+export type Page = Serialized<Packed<'Page'>>;
 
 export type PageEvent = {
 	pageId: Page['id'];
@@ -30,19 +31,19 @@ export type PageEvent = {
 	user: User;
 };
 
-export type Announcement = Packed<'Announcement'>;
-export type Antenna = Packed<'Antenna'>;
-export type App = Packed<'App'>;
-export type Ad = Packed<'Ad'>;
-export type Clip = Packed<'Clip'>;
-export type Channel = Packed<'Channel'>;
-export type Following = Packed<'Following'>;
-export type Blocking = Packed<'Blocking'>;
-export type Relay = Packed<'Relay'>;
-export type Role = Packed<'Role'>;
-export type RoleAssign = Packed<'RoleAssign'>;
-export type RolePolicy = Packed<'RolePolicy'>;
-export type RoleCondFormula = Packed<'RoleCondFormula'>;
+export type Announcement = Serialized<Packed<'Announcement'>>;
+export type Antenna = Serialized<Packed<'Antenna'>>;
+export type App = Serialized<Packed<'App'>>;
+export type Ad = Serialized<Packed<'Ad'>>;
+export type Clip = Serialized<Packed<'Clip'>>;
+export type Channel = Serialized<Packed<'Channel'>>;
+export type Following = Serialized<Packed<'Following'>>;
+export type Blocking = Serialized<Packed<'Blocking'>>;
+export type Relay = Serialized<Packed<'Relay'>>;
+export type Role = Serialized<Packed<'Role'>>;
+export type RoleAssign = Serialized<Packed<'RoleAssign'>>;
+export type RolePolicy = Serialized<Packed<'RolePolicy'>>;
+export type RoleCondFormula = Serialized<Packed<'RoleCondFormula'>>;
 
 export type LiteInstanceMetadata = {
 	maintainerName: string | null;
@@ -106,7 +107,7 @@ export type DetailedInstanceMetadata = LiteInstanceMetadata & {
 
 export type InstanceMetadata = LiteInstanceMetadata | DetailedInstanceMetadata;
 
-export type ServerInfo = Packed<'ServerInfo'>;
+export type ServerInfo = Selialized<Packed<'ServerInfo'>>;
 
 export type Stats = {
 	notesCount: number;
@@ -167,13 +168,7 @@ export type Instance = {
 	infoUpdatedAt: DateString | null;
 };
 
-export type Signin = {
-	id: ID;
-	createdAt: DateString;
-	ip: string;
-	headers: Record<string, any>;
-	success: boolean;
-};
+export type Signin = Serialized<Packed<'SignIn'>>;
 
 export type UserSorting =
 	| '+follower'
diff --git a/packages/misskey-js/src/schemas.ts b/packages/misskey-js/src/schemas.ts
index b5c8590633..d4557df297 100644
--- a/packages/misskey-js/src/schemas.ts
+++ b/packages/misskey-js/src/schemas.ts
@@ -51,6 +51,9 @@ import {
 	ServerInfoSchema,
 	ServerInfoAdminSchema,
 } from './schemas/server-info.js';
+import {
+	SignInSchema,
+} from './schemas/sign-in.js';
 import { packedModerationLogSchema } from './schemas/moderation-log.js';
 import { Error, ApiError } from './schemas/error.js';
 import type { JSONSchema7, JSONSchema7Definition, GetDef, GetRefs, GetKeys, UnionToArray } from 'schema-type';
@@ -103,6 +106,7 @@ export const refs = {
 	ServerInfo: ServerInfoSchema,
 	ServerInfoAdmin: ServerInfoAdminSchema,
 	ModerationLog: packedModerationLogSchema,
+	SignIn: SignInSchema,
 
 	Error: Error,
 	ApiError: ApiError,
diff --git a/packages/misskey-js/src/schemas/sign-in.ts b/packages/misskey-js/src/schemas/sign-in.ts
new file mode 100644
index 0000000000..1fa5624a88
--- /dev/null
+++ b/packages/misskey-js/src/schemas/sign-in.ts
@@ -0,0 +1,30 @@
+import type { JSONSchema7Definition } from 'schema-type';
+
+export const SignInSchema = {
+	$id: 'https://misskey-hub.net/api/schemas/SignIn',
+
+	type: 'object',
+	properties: {
+		id: { $ref: 'https://misskey-hub.net/api/schemas/Id' },
+        createdAt: {
+            type: 'string',
+            format: 'date-time',
+        },
+        ip: {
+            type: 'string',
+        },
+        headers: {
+            type: 'object',
+        },
+        success: {
+            type: 'boolean',
+        },
+	},
+	required: [
+        'id',
+        'createdAt',
+        'ip',
+        'headers',
+        'success',
+	],
+} as const satisfies JSONSchema7Definition;