diff --git a/src/plugins/meta.ts b/src/plugins/meta.ts
index 7832a1986..6aabd29c1 100644
--- a/src/plugins/meta.ts
+++ b/src/plugins/meta.ts
@@ -6,8 +6,10 @@ import type { FastifyBaseLogger, FastifySchema } from 'fastify';
 
 import type { UnionOfConst } from '@graasp/sdk';
 
+import { bustFileCache } from '../bustCache';
 import { resolveDependency } from '../di/utils';
 import { db } from '../drizzle/db';
+import { authenticateAdminSharedSecret } from '../services/auth/plugins/passport/preHandlers';
 import { SearchService } from '../services/item/plugins/publication/published/plugins/search/search.service';
 import { assertIsError } from '../utils/assertions';
 import {
@@ -110,10 +112,12 @@ const plugin: FastifyPluginAsyncTypebox = async (fastify) => {
     };
   });
 
-  fastify.get('/api/version', async (_, reply) => {
-    // allow request cross origin
-    reply.header('Access-Control-Allow-Origin', '*');
-    return `${APP_VERSION} @ ${BUILD_TIMESTAMP}`;
+  fastify.get('/api/version', async () => {
+    return { version: APP_VERSION, buildTimestamp: BUILD_TIMESTAMP };
+  });
+
+  fastify.get('/api/bust-cache', { preHandler: authenticateAdminSharedSecret }, async () => {
+    await bustFileCache();
   });
 };
 
diff --git a/src/services/auth/plugins/passport/plugin.ts b/src/services/auth/plugins/passport/plugin.ts
index e12a21ce9..c83a79f14 100644
--- a/src/services/auth/plugins/passport/plugin.ts
+++ b/src/services/auth/plugins/passport/plugin.ts
@@ -19,6 +19,7 @@ import { MemberRepository } from '../../../member/member.repository';
 import { MemberPasswordService } from '../password/password.service';
 import { SHORT_TOKEN_PARAM } from './constants';
 import { PassportStrategy } from './strategies';
+import adminSharedSecretStrategy from './strategies/adminSharedSecret';
 import emailChangeStrategy from './strategies/emailChange';
 import jwtAppsStrategy from './strategies/jwtApps';
 import jwtChallengeVerifierStrategy from './strategies/jwtChallengeVerifier';
@@ -57,6 +58,9 @@ const plugin: FastifyPluginAsync = async (fastify: FastifyInstance) => {
   //-- Sessions Strategies --//
   strictSessionStrategy(fastifyPassport);
 
+  //-- Shared Secret Strategy (machine-to-machine) --//
+  adminSharedSecretStrategy(fastifyPassport);
+
   //-- Password Strategies --//
   passwordStrategy(fastifyPassport, memberPasswordService, {
     propagateError: true,
diff --git a/src/services/auth/plugins/passport/preHandlers.ts b/src/services/auth/plugins/passport/preHandlers.ts
index 6c0f9b97e..a14fe8f38 100644
--- a/src/services/auth/plugins/passport/preHandlers.ts
+++ b/src/services/auth/plugins/passport/preHandlers.ts
@@ -74,6 +74,15 @@ export const guestAuthenticateAppsJWT = fastifyPassport.authenticate(
   },
 ) as RouteShorthandHook<preHandlerHookHandler>;
 
+/**
+ * Shared secret authentication for machine-to-machine routes.
+ * Requires `Authorization: Bearer <ADMIN_SHARED_SECRET>` header.
+ */
+export const authenticateAdminSharedSecret = fastifyPassport.authenticate(
+  PassportStrategy.AdminSharedSecret,
+  { session: false },
+) as RouteShorthandHook<preHandlerHookHandler>;
+
 /**
  * Pre-handler function that checks if the user meets at least one of the specified access preconditions.
  * @param strategies The array of role strategies to check for access.
diff --git a/src/services/auth/plugins/passport/strategies.ts b/src/services/auth/plugins/passport/strategies.ts
index 32349ed35..155534eb3 100644
--- a/src/services/auth/plugins/passport/strategies.ts
+++ b/src/services/auth/plugins/passport/strategies.ts
@@ -17,4 +17,7 @@ export enum PassportStrategy {
 
   //-- From Password --//
   Password = 'password',
+
+  //-- Shared Secret (machine-to-machine) --//
+  AdminSharedSecret = 'admin-shared-secret',
 }
diff --git a/src/services/auth/plugins/passport/strategies/adminSharedSecret.ts b/src/services/auth/plugins/passport/strategies/adminSharedSecret.ts
new file mode 100644
index 000000000..22d447487
--- /dev/null
+++ b/src/services/auth/plugins/passport/strategies/adminSharedSecret.ts
@@ -0,0 +1,21 @@
+import { Strategy } from 'passport-custom';
+
+import { Authenticator } from '@fastify/passport';
+
+import { ADMIN_SHARED_SECRET } from '../../../../../utils/config';
+import { UnauthorizedMember } from '../../../../../utils/errors';
+import { PassportStrategy } from '../strategies';
+import type { StrictVerifiedCallback } from '../types';
+
+export default (passport: Authenticator) => {
+  passport.use(
+    PassportStrategy.AdminSharedSecret,
+    new Strategy((req, done: StrictVerifiedCallback) => {
+      const authHeader = req.headers.authorization;
+      if (ADMIN_SHARED_SECRET && authHeader === `Bearer ${ADMIN_SHARED_SECRET}`) {
+        return done(null, {});
+      }
+      return done(new UnauthorizedMember(), false);
+    }),
+  );
+};
diff --git a/src/utils/config.ts b/src/utils/config.ts
index 3fc9c5c63..2297644cf 100644
--- a/src/utils/config.ts
+++ b/src/utils/config.ts
@@ -17,6 +17,8 @@ export const LOG_LEVEL: string | undefined = process.env.LOG_LEVEL;
 export const APP_VERSION = process.env.APP_VERSION;
 export const BUILD_TIMESTAMP = process.env.BUILD_TIMESTAMP;
 
+export const ADMIN_SHARED_SECRET = process.env.ADMIN_SHARED_SECRET;
+
 export const CLIENT_HOST = process.env.CLIENT_HOST ?? 'http://localhost:3114';
 
 export const LIBRARY_HOST = process.env.LIBRARY_CLIENT_HOST ?? CLIENT_HOST;