diff --git a/server/api/Login/ChangePassword.ts b/server/api/Login/ChangePassword.ts
index 50f105c..ef82b79 100644
--- a/server/api/Login/ChangePassword.ts
+++ b/server/api/Login/ChangePassword.ts
@@ -1,4 +1,4 @@
-import { ngGET } from "../defs";
+import { GET } from "../defs";
 import type { structure } from "../../apiStructure/sammoRootAPI";
 import type { ExtractError, ExtractQuery, ExtractResponse } from "../../apiStructure/defs";
 
@@ -9,7 +9,7 @@ type QType = ExtractQuery<BaseAPI>;
 const argValidator = undefined;
 const procDecorator = [] as const;
 
-export const ReqNonce = ngGET<RType, EType, QType>(argValidator)(procDecorator)(
+export const ReqNonce = GET<RType, EType, QType>(argValidator)(procDecorator)(
     (query, ctx, req, res) => {
         throw new Error("Method not implemented.");
     }
diff --git a/server/api/Login/LoginByID.ts b/server/api/Login/LoginByID.ts
index 073a229..109e724 100644
--- a/server/api/Login/LoginByID.ts
+++ b/server/api/Login/LoginByID.ts
@@ -1,4 +1,4 @@
-import { ngPOST } from "../defs";
+import { POST } from "../defs";
 import type { structure } from "../../apiStructure/sammoRootAPI";
 import type { ExtractError, ExtractQuery, ExtractResponse } from "../../apiStructure/defs";
 import { StartSession } from "../ProcDecorator/StartSession";
@@ -19,7 +19,7 @@ const procDecorator = [
     StartSession,
 ] as const;
 
-export const LoginByID = ngPOST<RType, EType, QType>(ArgValidator)(procDecorator)(
+export const LoginByID = POST<RType, EType, QType>(ArgValidator)(procDecorator)(
     async (query, ctx, req, res) => {
         const username = query.username;
         const password = query.password;
diff --git a/server/api/Login/LoginByToken.ts b/server/api/Login/LoginByToken.ts
index 0748b2c..892cb94 100644
--- a/server/api/Login/LoginByToken.ts
+++ b/server/api/Login/LoginByToken.ts
@@ -1,4 +1,4 @@
-import { ngPOST } from "../defs";
+import { POST } from "../defs";
 import type { structure } from "../../apiStructure/sammoRootAPI";
 import type { ExtractError, ExtractQuery, ExtractResponse } from "../../apiStructure/defs";
 import { StartSession } from "../ProcDecorator/StartSession";
@@ -18,7 +18,7 @@ const procDecorator = [
     StartSession,
 ] as const;
 
-export const LoginByToken = ngPOST<RType, EType, QType>(ArgValidator)(procDecorator)(
+export const LoginByToken = POST<RType, EType, QType>(ArgValidator)(procDecorator)(
     async (query, ctx) => {
         query.hashedToken;
         ctx.clearSession();
diff --git a/server/api/Login/ReqNonce.ts b/server/api/Login/ReqNonce.ts
index 1e59aff..dded3b1 100644
--- a/server/api/Login/ReqNonce.ts
+++ b/server/api/Login/ReqNonce.ts
@@ -1,4 +1,4 @@
-import { type APINamespaceType, ngGET } from "../defs";
+import { type APINamespaceType, GET as GET } from "../defs";
 import type { structure } from "../../apiStructure/sammoRootAPI";
 import type { DefAPINamespace, ExtractError, ExtractQuery, ExtractResponse } from "../../apiStructure/defs";
 import { StartSession } from "../ProcDecorator/StartSession";
@@ -12,7 +12,7 @@ const procDecorator = [
     StartSession,
 ] as const;
 
-export const ReqNonce = ngGET<RType, EType, QType>(argValidator)(procDecorator)(
+export const ReqNonce = GET<RType, EType, QType>(argValidator)(procDecorator)(
     async (query, ctx) => {
         const nonce = await ctx.getValue<string>("nonce");
         if(nonce !== undefined){
diff --git a/server/api/Login/test.ts b/server/api/Login/test.ts
index c5c5469..32f6981 100644
--- a/server/api/Login/test.ts
+++ b/server/api/Login/test.ts
@@ -1,4 +1,4 @@
-import { ngGET } from "../defs";
+import { GET } from "../defs";
 import type { structure } from "../../apiStructure/sammoRootAPI";
 import type { ExtractError, ExtractQuery, ExtractResponse } from "../../apiStructure/defs";
 
@@ -7,7 +7,7 @@ type RType = ExtractResponse<BaseAPI>;
 type EType = ExtractError<BaseAPI>;
 type QType = ExtractQuery<BaseAPI>;
 
-export const test = ngGET<RType, EType, QType>(undefined)(undefined)(
+export const test = GET<RType, EType, QType>(undefined)(undefined)(
     (query, ctx, req, res) => {
         throw new Error("Method not implemented.");
     }
diff --git a/server/api/defs.ts b/server/api/defs.ts
index f71c254..18ec97a 100644
--- a/server/api/defs.ts
+++ b/server/api/defs.ts
@@ -29,9 +29,9 @@ export type APINamespace = {
 type ValidatorType<T> = T extends undefined ? undefined : ClassType<T>;
 
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
-export type AnyAPIExecuter = ngAPIExecuter<any, any, any, any>;
+export type AnyAPIExecuter = APIExecuter<any, any, any, any>;
 
-interface ngAPIExecuter<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType, PD extends ProcDecoratorChain> {
+interface APIExecuter<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType, PD extends ProcDecoratorChain> {
     (query: Q, ctx: ResolveChain<PD>, expressReq: Request, expressRes: Response): Promise<R | E | true>;
     httpMethod: HttpMethod;
     argValidator?: ValidatorType<Q>;
@@ -39,35 +39,35 @@ interface ngAPIExecuter<R extends ValidResponse, E extends InvalidResponse, Q ex
     postDecorator: (ProcDecorator<any, any> | undefined)[];
 }
 
-export interface iAPI_GET<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType, PD extends ProcDecoratorChain> extends ngAPIExecuter<R, E, Q, PD> {
+export interface iAPI_GET<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType, PD extends ProcDecoratorChain> extends APIExecuter<R, E, Q, PD> {
     httpMethod: 'get';
 }
 
-export interface iAPI_POST<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType, PD extends ProcDecoratorChain> extends ngAPIExecuter<R, E, Q, PD> {
+export interface iAPI_POST<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType, PD extends ProcDecoratorChain> extends APIExecuter<R, E, Q, PD> {
     httpMethod: 'post';
 }
 
-export interface iAPI_PUT<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType, PD extends ProcDecoratorChain> extends ngAPIExecuter<R, E, Q, PD> {
+export interface iAPI_PUT<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType, PD extends ProcDecoratorChain> extends APIExecuter<R, E, Q, PD> {
     httpMethod: 'put';
 }
 
-export interface iAPI_DELETE<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType, PD extends ProcDecoratorChain> extends ngAPIExecuter<R, E, Q, PD> {
+export interface iAPI_DELETE<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType, PD extends ProcDecoratorChain> extends APIExecuter<R, E, Q, PD> {
     httpMethod: 'delete';
 }
 
-export interface iAPI_PATCH<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType, PD extends ProcDecoratorChain> extends ngAPIExecuter<R, E, Q, PD> {
+export interface iAPI_PATCH<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType, PD extends ProcDecoratorChain> extends APIExecuter<R, E, Q, PD> {
     httpMethod: 'patch';
 }
 
-export interface iAPI_HEAD<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType, PD extends ProcDecoratorChain> extends ngAPIExecuter<R, E, Q, PD> {
+export interface iAPI_HEAD<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType, PD extends ProcDecoratorChain> extends APIExecuter<R, E, Q, PD> {
     httpMethod: 'head';
 }
 
-function ngGenerateAPI<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType, PD extends ProcDecoratorChain>(httpMethod: HttpMethod,
+function generateAPI<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType, PD extends ProcDecoratorChain>(httpMethod: HttpMethod,
     argValidator: ValidatorType<Q> | undefined,
     procDecoratorChain: PD,
     callback: (query: Q, ctx: ResolveChain<PD>, expressReq: Request, expressRes: Response) => Promise<R | E | true>,
-): ngAPIExecuter<R, E, Q, PD> {
+): APIExecuter<R, E, Q, PD> {
     const preDecorator: ProcDecorator<any, any>[] = [];
     const postDecorator: (ProcDecorator<any, any> | undefined)[] = [];
     if (procDecoratorChain) {
@@ -95,10 +95,10 @@ function ngGenerateAPI<R extends ValidResponse, E extends InvalidResponse, Q ext
     );
 }
 
-export function ngGET<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType>(argValidator?: ValidatorType<Q>) {
+export function GET<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType>(argValidator?: ValidatorType<Q>) {
     return <PD extends ProcDecoratorChain>(procDecoratorChain: PD) => {
         return (callback: (query: Q, ctx: ResolveChain<PD>, expressReq: Request, expressRes: Response) => Promise<R | E | true>) => {
-            return ngGenerateAPI<R, E, Q, PD>(
+            return generateAPI<R, E, Q, PD>(
                 'get',
                 argValidator,
                 procDecoratorChain,
@@ -108,10 +108,10 @@ export function ngGET<R extends ValidResponse, E extends InvalidResponse, Q exte
     }
 }
 
-export function ngPOST<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType>(argValidator?: ValidatorType<Q>) {
+export function POST<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType>(argValidator?: ValidatorType<Q>) {
     return <PD extends ProcDecoratorChain>(procDecoratorChain: PD) => {
         return (callback: (query: Q, ctx: ResolveChain<PD>, expressReq: Request, expressRes: Response) => Promise<R | E | true>) => {
-            return ngGenerateAPI<R, E, Q, PD>(
+            return generateAPI<R, E, Q, PD>(
                 'post',
                 argValidator,
                 procDecoratorChain,
@@ -121,10 +121,10 @@ export function ngPOST<R extends ValidResponse, E extends InvalidResponse, Q ext
     }
 }
 
-export function ngPUT<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType>(argValidator?: ValidatorType<Q>) {
+export function PUT<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType>(argValidator?: ValidatorType<Q>) {
     return <PD extends ProcDecoratorChain>(procDecoratorChain: PD) => {
         return (callback: (query: Q, ctx: ResolveChain<PD>, expressReq: Request, expressRes: Response) => Promise<R | E | true>) => {
-            return ngGenerateAPI<R, E, Q, PD>(
+            return generateAPI<R, E, Q, PD>(
                 'put',
                 argValidator,
                 procDecoratorChain,
@@ -134,10 +134,10 @@ export function ngPUT<R extends ValidResponse, E extends InvalidResponse, Q exte
     }
 }
 
-export function ngDELETE<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType>(argValidator?: ValidatorType<Q>) {
+export function DELETE<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType>(argValidator?: ValidatorType<Q>) {
     return <PD extends ProcDecoratorChain>(procDecoratorChain: PD) => {
         return (callback: (query: Q, ctx: ResolveChain<PD>, expressReq: Request, expressRes: Response) => Promise<R | E | true>) => {
-            return ngGenerateAPI<R, E, Q, PD>(
+            return generateAPI<R, E, Q, PD>(
                 'delete',
                 argValidator,
                 procDecoratorChain,
@@ -147,10 +147,10 @@ export function ngDELETE<R extends ValidResponse, E extends InvalidResponse, Q e
     }
 }
 
-export function ngPATCH<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType>(argValidator?: ValidatorType<Q>) {
+export function PATCH<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType>(argValidator?: ValidatorType<Q>) {
     return <PD extends ProcDecoratorChain>(procDecoratorChain: PD) => {
         return (callback: (query: Q, ctx: ResolveChain<PD>, expressReq: Request, expressRes: Response) => Promise<R | E | true>) => {
-            return ngGenerateAPI<R, E, Q, PD>(
+            return generateAPI<R, E, Q, PD>(
                 'patch',
                 argValidator,
                 procDecoratorChain,
@@ -160,10 +160,10 @@ export function ngPATCH<R extends ValidResponse, E extends InvalidResponse, Q ex
     }
 }
 
-export function ngHEAD<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType>(argValidator?: ValidatorType<Q>) {
+export function HEAD<R extends ValidResponse, E extends InvalidResponse, Q extends RawArgType>(argValidator?: ValidatorType<Q>) {
     return <PD extends ProcDecoratorChain>(procDecoratorChain: PD) => {
         return (callback: (query: Q, ctx: ResolveChain<PD>, expressReq: Request, expressRes: Response) => Promise<R | E | true>) => {
-            return ngGenerateAPI<R, E, Q, PD>(
+            return generateAPI<R, E, Q, PD>(
                 'head',
                 argValidator,
                 procDecoratorChain,
diff --git a/server/api/generator.ts b/server/api/generator.ts
index 758a941..acca317 100644
--- a/server/api/generator.ts
+++ b/server/api/generator.ts
@@ -64,7 +64,7 @@ async function preCtx<PD extends ProcDecorator<any, any>>(preDecorator: PlainDec
     return ctx;
 }
 
-async function postCtx<PD extends ProcDecoratorChain>(ctx: ResolveChain<PD>, postDecorator: (undefined|PlainDecorator)[], req: Request, res: Response, index = -1): Promise<[InvalidProc, number] | undefined> {
+async function postCtx<PD extends ProcDecoratorChain>(ctx: ResolveChain<PD>, postDecorator: (undefined | PlainDecorator)[], req: Request, res: Response, index = -1): Promise<[InvalidProc, number] | undefined> {
     if (!postDecorator) {
         return;
     }
@@ -137,53 +137,55 @@ async function apiRun(query: object, req: Request, res: Response, api: AnyAPIExe
 
 export function buildAPISystem<N extends APINamespace, Q extends AnyAPIExecuter>(api: N | Q): Router {
     const router = Router();
+
+    if(typeof api === 'function') {
+        throw 'root api cannot be function';
+    }
+
     for (const [key, value] of Object.entries(api)) {
-        if (typeof value === 'function') {
-            const executer = new value() as Q;
-
-            if (!executer.httpMethod) {
-                throw new Error('APIExecuter.reqType is not defined');
-            }
-
-            if (executer.httpMethod === 'head') {
-                router[executer.httpMethod](key, async (req, res) => {
-                    let query: ExtractQuery<Q>;
-                    try {
-                        query = await parseParam(req, executer.argValidator);
-                    }
-                    catch (e) {
-                        res.json({
-                            result: false,
-                            reason: `invalid parameter: ${e}`,
-                        });
-                        return;
-                    }
-
-                    await apiRun(query, req, res, executer);
-                });
-            }
-            else {
-                router[executer.httpMethod](key, async (req, res) => {
-                    let query: ExtractQuery<Q>;
-                    try {
-                        query = await parseBody(req, executer.argValidator);
-                    }
-                    catch (e) {
-                        res.json({
-                            result: false,
-                            reason: `invalid parameter: ${e}`,
-                        });
-                        return;
-                    }
-
-                    await apiRun(query, req, res, executer);
-                });
-            }
-
-
-            continue;
-        } else {
+        if (typeof value !== 'function') {
             router.use(key, buildAPISystem(value));
+            continue;
+        }
+        const executer = value;
+
+        if (!executer.httpMethod) {
+            throw new Error('APIExecuter.reqType is not defined');
+        }
+
+        if (executer.httpMethod === 'get') {
+            router[executer.httpMethod](key, async (req, res) => {
+                let query: ExtractQuery<Q>;
+                try {
+                    query = await parseParam(req, executer.argValidator);
+                }
+                catch (e) {
+                    res.json({
+                        result: false,
+                        reason: `invalid parameter: ${e}`,
+                    });
+                    return;
+                }
+
+                await apiRun(query, req, res, executer);
+            });
+        }
+        else {
+            router[executer.httpMethod](key, async (req, res) => {
+                let query: ExtractQuery<Q>;
+                try {
+                    query = await parseBody(req, executer.argValidator);
+                }
+                catch (e) {
+                    res.json({
+                        result: false,
+                        reason: `invalid parameter: ${e}`,
+                    });
+                    return;
+                }
+
+                await apiRun(query, req, res, executer);
+            });
         }
     }
     return router;