diff --git a/packages/core/src/env/consts.ts b/packages/core/src/env/consts.ts
index 750028e69..78a8d19f2 100644
--- a/packages/core/src/env/consts.ts
+++ b/packages/core/src/env/consts.ts
@@ -4,3 +4,4 @@ export const signIn = assertEnv('UI_SIGN_IN_ROUTE');
 export const isProduction = getEnv('NODE_ENV') === 'production';
 export const port = Number(getEnv('PORT', '3001'));
 export const mountedApps = Object.freeze(['api', 'oidc']);
+export const developmentUserId = getEnv('DEVELOPMENT_USER_ID');
diff --git a/packages/core/src/middleware/koa-auth.ts b/packages/core/src/middleware/koa-auth.ts
index 6e7d091ab..1ed6c599e 100644
--- a/packages/core/src/middleware/koa-auth.ts
+++ b/packages/core/src/middleware/koa-auth.ts
@@ -1,12 +1,14 @@
 import assert from 'assert';
+import { IncomingHttpHeaders } from 'http';
 import RequestError from '@/errors/RequestError';
-import { MiddlewareType } from 'koa';
+import { MiddlewareType, Request } from 'koa';
 import { jwtVerify } from 'jose/jwt/verify';
 import { publicKey, issuer, adminResource } from '@/oidc/consts';
 import { IRouterParamContext } from 'koa-router';
 import { UserInfo, userInfoSelectFields } from '@logto/schemas';
 import { findUserById } from '@/queries/user';
 import pick from 'lodash.pick';
+import { developmentUserId, isProduction } from '@/env/consts';
 
 export type WithAuthContext<ContextT extends IRouterParamContext = IRouterParamContext> =
   ContextT & {
@@ -15,35 +17,45 @@ export type WithAuthContext<ContextT extends IRouterParamContext = IRouterParamC
 
 const bearerToken = 'Bearer';
 
+const extractBearerTokenFromHeaders = ({ authorization }: IncomingHttpHeaders) => {
+  assert(
+    authorization,
+    new RequestError({ code: 'auth.authorization_header_missing', status: 401 })
+  );
+  assert(
+    authorization.startsWith(bearerToken),
+    new RequestError(
+      { code: 'auth.authorization_type_not_supported', status: 401 },
+      { supportedTypes: [bearerToken] }
+    )
+  );
+  return authorization.slice(bearerToken.length + 1);
+};
+
+const getUserIdFromRequest = async (request: Request) => {
+  if (!isProduction && developmentUserId) {
+    return developmentUserId;
+  }
+
+  const {
+    payload: { sub },
+  } = await jwtVerify(extractBearerTokenFromHeaders(request.headers), publicKey, {
+    issuer,
+    audience: adminResource,
+  });
+  assert(sub);
+  return sub;
+};
+
 export default function koaAuth<
   StateT,
   ContextT extends IRouterParamContext,
   ResponseBodyT
 >(): MiddlewareType<StateT, WithAuthContext<ContextT>, ResponseBodyT> {
   return async (ctx, next) => {
-    const { authorization } = ctx.request.headers;
-    assert(
-      authorization,
-      new RequestError({ code: 'auth.authorization_header_missing', status: 401 })
-    );
-    assert(
-      authorization.startsWith(bearerToken),
-      new RequestError(
-        { code: 'auth.authorization_type_not_supported', status: 401 },
-        { supportedTypes: [bearerToken] }
-      )
-    );
-    const jwt = authorization.slice(bearerToken.length + 1);
-
     try {
-      const {
-        payload: { sub },
-      } = await jwtVerify(jwt, publicKey, {
-        issuer,
-        audience: adminResource,
-      });
-      assert(sub);
-      const user = await findUserById(sub);
+      const userId = await getUserIdFromRequest(ctx.request);
+      const user = await findUserById(userId);
       ctx.user = pick(user, ...userInfoSelectFields);
     } catch {
       throw new RequestError({ code: 'auth.unauthorized', status: 401 });
diff --git a/packages/core/src/queries/application.ts b/packages/core/src/queries/application.ts
index 29ecdc95b..0a2e931ef 100644
--- a/packages/core/src/queries/application.ts
+++ b/packages/core/src/queries/application.ts
@@ -1,6 +1,7 @@
 import { buildInsertInto } from '@/database/insert';
 import pool from '@/database/pool';
 import { convertToIdentifiers } from '@/database/utils';
+import RequestError from '@/errors/RequestError';
 import { ApplicationDBEntry, Applications } from '@logto/schemas';
 import { sql } from 'slonik';
 
@@ -8,11 +9,21 @@ const { table, fields } = convertToIdentifiers(Applications);
 
 export const findApplicationById = async (id: string) =>
   pool.one<ApplicationDBEntry>(sql`
-  select ${sql.join(Object.values(fields), sql`, `)}
-  from ${table}
-  where ${fields.id}=${id}
-`);
+    select ${sql.join(Object.values(fields), sql`, `)}
+    from ${table}
+    where ${fields.id}=${id}
+  `);
 
 export const insertApplication = buildInsertInto<ApplicationDBEntry>(pool, Applications, {
   returning: true,
 });
+
+export const deleteApplicationById = async (id: string) => {
+  const { rowCount } = await pool.query(sql`
+    delete from ${table}
+    where id=${id}
+  `);
+  if (rowCount < 1) {
+    throw new RequestError({ code: 'entity.not_exists', name: Applications.tableSingular, id });
+  }
+};
diff --git a/packages/core/src/routes/application.ts b/packages/core/src/routes/application.ts
index 5c4a28d7f..ff8402207 100644
--- a/packages/core/src/routes/application.ts
+++ b/packages/core/src/routes/application.ts
@@ -2,7 +2,7 @@ import Router from 'koa-router';
 import { nativeEnum, object, string } from 'zod';
 import { ApplicationType } from '@logto/schemas';
 import koaGuard from '@/middleware/koa-guard';
-import { insertApplication } from '@/queries/application';
+import { deleteApplicationById, insertApplication } from '@/queries/application';
 import { buildIdGenerator } from '@/utils/id';
 import { generateOidcClientMetadata } from '@/oidc/utils';
 
@@ -29,4 +29,16 @@ export default function applicationRoutes<StateT, ContextT>(router: Router<State
       return next();
     }
   );
+
+  router.delete(
+    '/application/:id',
+    koaGuard({ params: object({ id: string().min(1) }) }),
+    async (ctx, next) => {
+      const { id } = ctx.guard.params;
+      // Note: will need delete cascade when application is joint with other tables
+      await deleteApplicationById(id);
+      ctx.status = 204;
+      return next();
+    }
+  );
 }
diff --git a/packages/phrases/src/locales/en.ts b/packages/phrases/src/locales/en.ts
index eb7872cb9..89c6b2f4d 100644
--- a/packages/phrases/src/locales/en.ts
+++ b/packages/phrases/src/locales/en.ts
@@ -39,6 +39,7 @@ const errors = {
   },
   entity: {
     create_failed: 'Failed to create {{name}}.',
+    not_exists: 'The {{name}} with ID `{{id}}` does not exist.',
   },
 };
 
diff --git a/packages/phrases/src/locales/zh-cn.ts b/packages/phrases/src/locales/zh-cn.ts
index 02520a113..08c52ba9e 100644
--- a/packages/phrases/src/locales/zh-cn.ts
+++ b/packages/phrases/src/locales/zh-cn.ts
@@ -40,7 +40,8 @@ const errors = {
     invalid_zod_type: '无效的 Zod 类型，请检查路由 guard 配置。',
   },
   entity: {
-    create_failed: '创建{{name}}失败。',
+    create_failed: '创建 {{name}} 失败。',
+    not_exists: 'ID 为 `{{id}}` 的 {{name}} 不存在。',
   },
 };