diff --git a/packages/core/src/middleware/koa-error-handler.ts b/packages/core/src/middleware/koa-error-handler.ts
index cd4c1cb9b..8e4a7318b 100644
--- a/packages/core/src/middleware/koa-error-handler.ts
+++ b/packages/core/src/middleware/koa-error-handler.ts
@@ -1,5 +1,6 @@
 import RequestError from '@/errors/RequestError';
 import { RequestErrorBody } from '@logto/schemas';
+import { LogtoErrorCode } from '@logto/phrases';
 import decamelize from 'decamelize';
 import { Middleware } from 'koa';
 import { errors } from 'oidc-provider';
@@ -23,7 +24,8 @@ export default function koaErrorHandler<StateT, ContextT>(): Middleware<
         ctx.status = error.status;
         ctx.body = {
           message: error.error_description ?? error.message,
-          code: `oidc.${decamelize(error.name)}`,
+          // Assert error type of OIDCProviderError, code key should all covered in @logto/phrases
+          code: `oidc.${decamelize(error.name)}` as LogtoErrorCode,
           data: error.error_detail,
         };
         return;
diff --git a/packages/schemas/src/api/error.ts b/packages/schemas/src/api/error.ts
index ab5cb9c5f..130083c2f 100644
--- a/packages/schemas/src/api/error.ts
+++ b/packages/schemas/src/api/error.ts
@@ -5,4 +5,4 @@ export type RequestErrorMetadata = Record<string, unknown> & {
   status?: number;
 };
 
-export type RequestErrorBody = { message: string; data: unknown; code: string };
+export type RequestErrorBody = { message: string; data: unknown; code: LogtoErrorCode };
diff --git a/packages/ui/package.json b/packages/ui/package.json
index c0f61aff6..2685fb99a 100644
--- a/packages/ui/package.json
+++ b/packages/ui/package.json
@@ -18,6 +18,7 @@
   },
   "dependencies": {
     "@logto/phrases": "^0.1.0",
+    "@logto/schemas": "^0.1.0",
     "classnames": "^2.3.1",
     "i18next": "^20.3.3",
     "i18next-browser-languagedetector": "^6.1.2",
diff --git a/packages/ui/razzle.config.js b/packages/ui/razzle.config.js
index dfb5be02b..223224f62 100644
--- a/packages/ui/razzle.config.js
+++ b/packages/ui/razzle.config.js
@@ -21,6 +21,11 @@ module.exports = {
     /** @type {import('@jest/types').Config.InitialOptions} **/
     const config = { ...jestConfig };
 
+    config.transformIgnorePatterns = [
+      '^.+\\.module\\.(css|sass|scss)$',
+      '[/\\\\]node_modules[/\\\\]((?!ky[/\\\\]).)+\\.(js|jsx|mjs|cjs|ts|tsx)$',
+    ];
+
     config.moduleNameMapper = {
       ...config.moduleNameMapper,
       '^.+\\.(css|less|scss)$': 'babel-jest',
diff --git a/packages/ui/src/hooks/use-api.ts b/packages/ui/src/hooks/use-api.ts
new file mode 100644
index 000000000..a0431b902
--- /dev/null
+++ b/packages/ui/src/hooks/use-api.ts
@@ -0,0 +1,46 @@
+import { useState } from 'react';
+import { HTTPError } from 'ky';
+import { RequestErrorBody } from '@logto/schemas';
+
+type UseApi<T extends any[], U> = {
+  result?: U;
+  loading: boolean;
+  error: RequestErrorBody | null;
+  run: (...args: T) => Promise<void>;
+};
+
+function useApi<Args extends any[], Response>(
+  api: (...args: Args) => Promise<Response>
+): UseApi<Args, Response> {
+  const [loading, setLoading] = useState(false);
+  const [error, setError] = useState<RequestErrorBody | null>(null);
+  const [result, setResult] = useState<Response>();
+
+  const run = async (...args: Args) => {
+    setLoading(true);
+    setError(null);
+
+    try {
+      const result = await api(...args);
+      setResult(result);
+      setLoading(false);
+    } catch (error: unknown) {
+      if (error instanceof HTTPError) {
+        const kyError = await error.response.json<RequestErrorBody>();
+        setError(kyError);
+      }
+
+      setLoading(false);
+      throw error;
+    }
+  };
+
+  return {
+    loading,
+    error,
+    result,
+    run,
+  };
+}
+
+export default useApi;
diff --git a/packages/ui/src/include.d/dom.d.ts b/packages/ui/src/include.d/dom.d.ts
index 9b1811626..5c68dd0b2 100644
--- a/packages/ui/src/include.d/dom.d.ts
+++ b/packages/ui/src/include.d/dom.d.ts
@@ -69,3 +69,7 @@ type AutoCompleteType =
   | 'sex'
   | 'url'
   | 'photo';
+
+interface Body {
+  json<T>(): Promise<T>;
+}
diff --git a/packages/ui/src/pages/Register/index.tsx b/packages/ui/src/pages/Register/index.tsx
index 0f9493d08..4c2fb2ff0 100644
--- a/packages/ui/src/pages/Register/index.tsx
+++ b/packages/ui/src/pages/Register/index.tsx
@@ -1,63 +1,65 @@
-import React, { FC, FormEventHandler, useState, useCallback } from 'react';
+import React, { FC, FormEventHandler, useState, useCallback, useEffect } from 'react';
 import { useTranslation } from 'react-i18next';
 import classNames from 'classnames';
+import { LogtoErrorI18nKey } from '@logto/phrases';
 
 import { register } from '@/apis/register';
 import Button from '@/components/Button';
 import Input from '@/components/Input';
 import MessageBox from '@/components/MessageBox';
 import TextLink from '@/components/TextLink';
+import useApi from '@/hooks/use-api';
 
 import styles from './index.module.scss';
 
-export type PageState = 'idle' | 'loading' | 'error';
-
-const App: FC = () => {
-  const { t } = useTranslation();
+const Register: FC = () => {
+  const { t, i18n } = useTranslation();
   const [username, setUsername] = useState('');
   const [password, setPassword] = useState('');
-  const [pageState, setPageState] = useState<PageState>('idle');
-  const isLoading = pageState === 'loading';
+
+  const { loading, error, result, run: asyncRegister } = useApi(register);
 
   const signUp: FormEventHandler = useCallback(
     async (event) => {
       event.preventDefault();
-      setPageState('loading');
-      try {
-        window.location.href = (await register(username, password)).redirectTo;
-      } catch {
-        // TODO: Show specific error after merge into monorepo
-        setPageState('error');
-      }
+      await asyncRegister(username, password);
     },
-    [username, password]
+    [username, password, asyncRegister]
   );
 
+  useEffect(() => {
+    if (result?.redirectTo) {
+      window.location.href = result.redirectTo;
+    }
+  }, [result]);
+
   return (
     <div className={classNames(styles.wrapper)}>
       <form className={classNames(styles.form)}>
         <div className={styles.title}>{t('register.create_account')}</div>
         <Input
           name="username"
-          isDisabled={isLoading}
+          isDisabled={loading}
           placeholder={t('sign_in.username')}
           value={username}
           onChange={setUsername} // TODO: account validation
         />
         <Input
           name="password"
-          isDisabled={isLoading}
+          isDisabled={loading}
           placeholder={t('sign_in.password')}
           type="password"
           value={password}
           onChange={setPassword} // TODO: password validation
         />
-        {pageState === 'error' && (
-          <MessageBox className={styles.box}>{t('sign_in.error')}</MessageBox>
+        {error && (
+          <MessageBox className={styles.box}>
+            {i18n.t<string, LogtoErrorI18nKey>(`errors:${error.code}`)}
+          </MessageBox>
         )}
         <Button
-          isDisabled={isLoading}
-          value={isLoading ? t('register.loading') : t('register.action')}
+          isDisabled={loading}
+          value={loading ? t('register.loading') : t('register.action')}
           onClick={signUp}
         />
 
@@ -70,4 +72,4 @@ const App: FC = () => {
   );
 };
 
-export default App;
+export default Register;
diff --git a/packages/ui/src/pages/SignIn/index.tsx b/packages/ui/src/pages/SignIn/index.tsx
index 6235eb155..3042b9464 100644
--- a/packages/ui/src/pages/SignIn/index.tsx
+++ b/packages/ui/src/pages/SignIn/index.tsx
@@ -1,39 +1,39 @@
-import React, { FC, FormEventHandler, useState, useCallback } from 'react';
+import React, { FC, FormEventHandler, useState, useCallback, useEffect } from 'react';
 import { useTranslation } from 'react-i18next';
 import classNames from 'classnames';
+import { LogtoErrorI18nKey } from '@logto/phrases';
 
 import { signInBasic } from '@/apis/sign-in';
 import Button from '@/components/Button';
 import Input from '@/components/Input';
 import MessageBox from '@/components/MessageBox';
 import TextLink from '@/components/TextLink';
+import useApi from '@/hooks/use-api';
 
 import styles from './index.module.scss';
 
-export type PageState = 'idle' | 'loading' | 'error';
-
-const Home: FC = () => {
-  // TODO: Consider creading cross page data modal
-  const { t } = useTranslation();
+const SignIn: FC = () => {
+  // TODO: Consider creating cross page data modal
+  const { t, i18n } = useTranslation();
   const [username, setUsername] = useState('');
   const [password, setPassword] = useState('');
-  const [pageState, setPageState] = useState<PageState>('idle');
-  const isLoading = pageState === 'loading';
 
-  const signIn: FormEventHandler = useCallback(
+  const { loading, error, result, run: asyncSignInBasic } = useApi(signInBasic);
+
+  const signInHandler: FormEventHandler = useCallback(
     async (event) => {
       event.preventDefault();
-      setPageState('loading');
-      try {
-        window.location.href = (await signInBasic(username, password)).redirectTo;
-      } catch {
-        // TODO: Show specific error after merge into monorepo
-        setPageState('error');
-      }
+      await asyncSignInBasic(username, password);
     },
-    [username, password]
+    [username, password, asyncSignInBasic]
   );
 
+  useEffect(() => {
+    if (result?.redirectTo) {
+      window.location.href = result.redirectTo;
+    }
+  }, [result]);
+
   return (
     <div className={classNames(styles.wrapper)}>
       <form className={classNames(styles.form)}>
@@ -41,7 +41,7 @@ const Home: FC = () => {
         <Input
           name="username"
           autoComplete="username"
-          isDisabled={isLoading}
+          isDisabled={loading}
           placeholder={t('sign_in.username')}
           value={username}
           onChange={setUsername}
@@ -49,19 +49,21 @@ const Home: FC = () => {
         <Input
           name="password"
           autoComplete="current-password"
-          isDisabled={isLoading}
+          isDisabled={loading}
           placeholder={t('sign_in.password')}
           type="password"
           value={password}
           onChange={setPassword}
         />
-        {pageState === 'error' && (
-          <MessageBox className={styles.box}>{t('sign_in.error')}</MessageBox>
+        {error && (
+          <MessageBox className={styles.box}>
+            {i18n.t<string, LogtoErrorI18nKey>(`errors:${error.code}`)}
+          </MessageBox>
         )}
         <Button
-          isDisabled={isLoading}
-          value={isLoading ? t('sign_in.loading') : t('sign_in.action')}
-          onClick={signIn}
+          isDisabled={loading}
+          value={loading ? t('sign_in.loading') : t('sign_in.action')}
+          onClick={signInHandler}
         />
         <TextLink className={styles.createAccount} href="/register">
           {t('register.create_account')}
@@ -71,4 +73,4 @@ const Home: FC = () => {
   );
 };
 
-export default Home;
+export default SignIn;
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index ff70a0b2b..35f8b7446 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -161,6 +161,7 @@ importers:
       '@logto/eslint-config': ^0.1.0-rc.18
       '@logto/eslint-config-react': ^0.1.0-rc.18
       '@logto/phrases': ^0.1.0
+      '@logto/schemas': ^0.1.0
       '@logto/ts-config': ^0.1.0-rc.18
       '@logto/ts-config-react': ^0.1.0-rc.18
       '@testing-library/react': ^12.0.0
@@ -195,6 +196,7 @@ importers:
       webpack-dev-server: ^3.11.2
     dependencies:
       '@logto/phrases': link:../phrases
+      '@logto/schemas': link:../schemas
       classnames: 2.3.1
       i18next: 20.3.5
       i18next-browser-languagedetector: 6.1.2