diff --git a/server/api/APIPathGen.ts b/server/api/APIPathGen.ts
new file mode 100644
index 0000000..df8fca9
--- /dev/null
+++ b/server/api/APIPathGen.ts
@@ -0,0 +1,37 @@
+export function APIPathGen<T extends object, V>(
+    obj: T,
+    callback: (path: string[], tail: V, pathParam?: Record<string, string | number>) => unknown,
+    path: string[] = [],
+): T {
+    const map = new Map<string, unknown>();
+    return new Proxy(obj, {
+        get(target, key) {
+            if(typeof key === 'symbol'){
+                throw new Error('Symbol is not supported');
+            }
+
+            if(map.has(key)){
+                return map.get(key)!;
+            }
+
+            const nextPath = [...path, key];
+
+            let next: T[keyof T];
+            if (key in target) {
+                next = target[key as keyof typeof target];
+            }
+            else {
+                throw `${nextPath} is not exists`;
+            }
+
+            if (typeof (next) === 'function') {
+                const result = callback(nextPath, next);
+                map.set(key, result);
+                return result;
+            }
+            const result = APIPathGen<T[keyof T], V>(next, callback, nextPath);
+            map.set(key, result);
+            return result;
+        }
+    }) as T;
+};
\ No newline at end of file
diff --git a/server/api/base.ts b/server/api/base.ts
index 8723d5e..9201658 100644
--- a/server/api/base.ts
+++ b/server/api/base.ts
@@ -28,8 +28,8 @@ export type APINamespace = {
     ;
 }
 
-export abstract class APIExecuter<Q extends object, R extends ValidResponse, E extends InvalidResponse>{
-    readonly reqType: HttpMethod | HttpMethod[];
+export abstract class APIExecuter<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType>{
+    readonly abstract reqType: HttpMethod | HttpMethod[];
     protected abstract parseQuery(expressReq: Request): Promise<Q>;
     protected abstract api(query: Q, expressReq: Request, expressRes: Response): Promise<R | E | typeof treatedSpecial>;
     public async run(expressReq: Request, expressRes: Response): Promise<void> {
@@ -43,15 +43,15 @@ export abstract class APIExecuter<Q extends object, R extends ValidResponse, E e
     }
 }
 
-export abstract class APIBodyParseExecuter<Q extends object, R extends ValidResponse, E extends InvalidResponse> extends APIExecuter<Q, R, E>{
+export abstract class APIBodyParseExecuter<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType> extends APIExecuter<R, E, Q>{
     protected async parseQuery(expressReq: Request): Promise<Q> {
         throw new Error('Not implemented');
         return expressReq.body;
     }
 }
 
-export abstract class GET<Q extends object, R extends ValidResponse, E extends InvalidResponse> extends APIExecuter<Q, R, E>{
-    readonly reqType = 'get';
+export abstract class GET<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType> extends APIExecuter<R, E, Q>{
+    override readonly reqType = 'get';
     protected async parseQuery(expressReq: Request): Promise<Q> {
         expressReq.query;
         throw new Error('Not implemented');
@@ -59,22 +59,22 @@ export abstract class GET<Q extends object, R extends ValidResponse, E extends I
     }
 }
 
-export abstract class POST<Q extends object, R extends ValidResponse, E extends InvalidResponse> extends APIBodyParseExecuter<Q, R, E>{
+export abstract class POST<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType> extends APIBodyParseExecuter<R, E, Q>{
     readonly reqType = 'post';
 }
 
-export abstract class PUT<Q extends object, R extends ValidResponse, E extends InvalidResponse> extends APIBodyParseExecuter<Q, R, E>{
+export abstract class PUT<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType> extends APIBodyParseExecuter<R, E, Q>{
     readonly reqType = 'put';
 }
 
-export abstract class DELETE<Q extends object, R extends ValidResponse, E extends InvalidResponse> extends APIBodyParseExecuter<Q, R, E>{
+export abstract class DELETE<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType> extends APIBodyParseExecuter<R, E, Q>{
     readonly reqType = 'delete';
 }
 
-export abstract class PATCH<Q extends object, R extends ValidResponse, E extends InvalidResponse> extends APIBodyParseExecuter<Q, R, E>{
+export abstract class PATCH<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType> extends APIBodyParseExecuter<R, E, Q>{
     readonly reqType = 'patch';
 }
 
-export abstract class HEAD<Q extends object, R extends ValidResponse, E extends InvalidResponse> extends APIBodyParseExecuter<Q, R, E>{
+export abstract class HEAD<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType> extends APIBodyParseExecuter<R, E, Q>{
     readonly reqType = 'head';
 }
\ No newline at end of file
diff --git a/server/api/clientAPI.ts b/server/clientAPI/clientAPI.ts
similarity index 85%
rename from server/api/clientAPI.ts
rename to server/clientAPI/clientAPI.ts
index 84281da..754daa9 100644
--- a/server/api/clientAPI.ts
+++ b/server/clientAPI/clientAPI.ts
@@ -1,10 +1,53 @@
 import ky from 'ky';
-import type { APIExecuter, APINamespace, HttpMethod, InvalidResponse, RawArgType, ValidResponse } from './base.js';
+import type { APIExecuter, APINamespace, HttpMethod, InvalidResponse, RawArgType, ValidResponse } from '../api/base.js';
 import isArray from 'lodash-es/isArray.js';
 import isEmpty from 'lodash-es/isEmpty.js';
 
 const apiPath = process.env.API_ROOT_PATH ?? process.env.VITE_API_ROOT_PATH ?? '/api';
 
+interface BasicAPICallT<
+  ArgType extends RawArgType,
+  ResultType extends ValidResponse,
+  ErrorType extends InvalidResponse
+> {
+  (args: ArgType): Promise<ResultType>;
+  (args: ArgType, returnError: false): Promise<ResultType>;
+  (args: ArgType, returnError: true): Promise<ResultType | ErrorType>;
+}
+
+interface EmptyAPICallT<ResultType extends ValidResponse, ErrorType extends InvalidResponse> {
+  (): Promise<ResultType>;
+  (args: undefined): Promise<ResultType>;
+  (args: undefined, returnError: false): Promise<ResultType>;
+  (args: undefined, returnError: true): Promise<ResultType | ErrorType>;
+}
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export type ArgTypeOf<T> = T extends APICallT<infer A, any, any> ? A : never;
+
+
+export type APICallT<
+  ArgType extends RawArgType,
+  ResultType extends ValidResponse = ValidResponse,
+  ErrorType extends InvalidResponse = InvalidResponse
+> = ArgType extends undefined ? EmptyAPICallT<ResultType, ErrorType> : BasicAPICallT<ArgType, ResultType, ErrorType>;
+
+export type APITail = typeof GET | typeof POST | typeof PUT | typeof PATCH | typeof HEAD | typeof DELETE;
+
+const httpMethodMap = new Map<APITail, HttpMethod>([
+    [GET, "get"],
+    [POST, "post"],
+    [PUT, "put"],
+    [PATCH, "patch"],
+    [HEAD, "head"],
+    [DELETE, "delete"],
+  ]);
+
+  export function extractHttpMethod(tail: APITail): HttpMethod {
+    return httpMethodMap.get(tail) ?? "post";
+  }
+
+
 export async function GET<ResultType extends ValidResponse, ArgType extends undefined = undefined>(
     args?: ArgType
 ): Promise<ResultType>;
diff --git a/server/clientAPI/sammoRootAPI.ts b/server/clientAPI/sammoRootAPI.ts
new file mode 100644
index 0000000..c893961
--- /dev/null
+++ b/server/clientAPI/sammoRootAPI.ts
@@ -0,0 +1,56 @@
+import { APIPathGen } from "../api/APIPathGen";
+import { RawArgType } from "../api/base";
+import { APICallT, APITail, GET, POST, callClientAPI, extractHttpMethod } from "./clientAPI";
+
+export type LoginResponse = {
+    result: true,
+    nextToken: [number, string] | undefined,
+}
+
+export type LoginFailed = {
+    result: false,
+    reqOTP: boolean,
+    reason: string,
+}
+
+
+export type AutoLoginNonceResponse = {
+    result: true,
+    loginNonce: string,
+};
+
+export type AutoLoginResponse = {
+    result: true,
+    nextToken: [number, string] | undefined,
+}
+
+
+export type AutoLoginFailed = {
+    result: false,
+    silent: boolean,
+    reason: string,
+}
+
+const apiRealPath = {
+    Login: {
+        LoginByID: POST as APICallT<{
+            username: string,
+            password: string,
+        }, LoginResponse, LoginFailed>,
+        LoginByToken: POST as APICallT<{
+            hashedToken: string,
+            token_id: number,
+        }, AutoLoginResponse, AutoLoginFailed>,
+        ReqNonce: GET as APICallT<undefined, AutoLoginNonceResponse, AutoLoginFailed>
+    },
+} as const;
+
+export const SammoRootAPI = APIPathGen(apiRealPath, (path: string[], tail: APITail, pathParam) => {
+    const method = extractHttpMethod(tail);
+    return (args?: RawArgType, returnError?: boolean) => {
+        if (returnError) {
+            return callClientAPI(method, path.join('/'), args, pathParam, true);
+        }
+        return callClientAPI(method, path.join('/'), args, pathParam);
+    };
+});
\ No newline at end of file
diff --git a/server/index.ts b/server/index.ts
index e782055..b39b5a7 100644
--- a/server/index.ts
+++ b/server/index.ts
@@ -1,6 +1,6 @@
 import 'dotenv/config';
 import 'reflect-metadata';
-import { BasicQueryDTO } from './api/index.js';
+import { BasicQueryDTO } from './api/serverImpl.js';
 import { validate } from 'class-validator';
 import express, { type Request, type Response } from "express"
 import { AppDataSource } from "./data_source.js"
@@ -21,22 +21,13 @@ export async function test() {
     console.log(result);
     //must be integer가 나타나야함
 
-    const rawRng = new LiteHashDRBG(simpleSerialize(
-        'haha',
-        'hoho'
-    ));
-
-    const arr: Promise<Uint8Array>[] = [];
-    let j = 0;
-    for(let i = 0; i < 100; i += 1){
-        arr.push(rawRng.nextBits(32).then((v) => {
-            console.log(`${j}: ${i}`);
-            j += 1;
-            return v;
-        }));
+    const abc= {
+        a: 1,
+        b: 2,
+        c: 3,
     }
-
-    await Promise.all(arr);
+    const t2 = await validate(abc);
+    console.log(t2);
 }
 
 
diff --git a/tsconfig.json b/tsconfig.json
index 883b4b1..3706827 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -11,18 +11,20 @@
   "compilerOptions": {
     "experimentalDecorators": true,
     "emitDecoratorMetadata": true,
+    "module": "ESNext",
+    "moduleResolution": "node",
     "resolveJsonModule": true,
-    "noImplicitOverride": true,
-    "noImplicitReturns": true,
-    "noPropertyAccessFromIndexSignature": true,
+    "importHelpers": true,
     "isolatedModules": true,
     "verbatimModuleSyntax": true,
     "allowSyntheticDefaultImports": true,
     "esModuleInterop": true,
     "forceConsistentCasingInFileNames": true,
-    "moduleResolution": "node",
     "strict": true,
-    "importHelpers": true,
+    "noImplicitOverride": true,
+    "noImplicitReturns": true,
+    "noFallthroughCasesInSwitch": true,
+    "noPropertyAccessFromIndexSignature": true,
     "paths": {
       "@util/*": ["./server/util/*"],
       "@server/*": ["./server/*"],