diff --git a/services/mcp-server/src/lib/auth.test.ts b/services/mcp-server/src/lib/auth.test.ts
new file mode 100644
index 00000000..61e09bf6
--- /dev/null
+++ b/services/mcp-server/src/lib/auth.test.ts
@@ -0,0 +1,47 @@
+import { SignJWT } from 'jose';
+import { describe, expect, it } from 'vitest';
+import { ForbiddenError, UnauthorizedError } from '@bytelyst/errors';
+import { requireAuth, requireRole, verifyJwtToken } from './auth.js';
+
+describe('mcp auth helpers', () => {
+  const secret = new TextEncoder().encode('test-secret');
+
+  it('verifyJwtToken accepts tokens from the bytelyst-platform issuer', async () => {
+    const token = await new SignJWT({ sub: 'user_1', role: 'admin' })
+      .setProtectedHeader({ alg: 'HS256' })
+      .setIssuer('bytelyst-platform')
+      .setExpirationTime('1h')
+      .sign(secret);
+
+    await expect(verifyJwtToken(token, secret)).resolves.toMatchObject({
+      sub: 'user_1',
+      role: 'admin',
+    });
+  });
+
+  it('verifyJwtToken rejects tokens from the wrong issuer', async () => {
+    const token = await new SignJWT({ sub: 'user_1' })
+      .setProtectedHeader({ alg: 'HS256' })
+      .setIssuer('wrong-issuer')
+      .setExpirationTime('1h')
+      .sign(secret);
+
+    await expect(verifyJwtToken(token, secret)).rejects.toThrow();
+  });
+
+  it('requireAuth throws when jwtPayload is missing', () => {
+    expect(() => requireAuth({ headers: {} })).toThrow(UnauthorizedError);
+  });
+
+  it('requireRole throws when role is below the minimum required level', () => {
+    expect(() =>
+      requireRole(
+        {
+          headers: {},
+          jwtPayload: { sub: 'user_1', role: 'viewer' },
+        },
+        'admin'
+      )
+    ).toThrow(ForbiddenError);
+  });
+});
diff --git a/services/mcp-server/src/lib/auth.ts b/services/mcp-server/src/lib/auth.ts
index cfccfbb9..7056a686 100644
--- a/services/mcp-server/src/lib/auth.ts
+++ b/services/mcp-server/src/lib/auth.ts
@@ -1,7 +1,10 @@
+import { jwtVerify } from 'jose';
 import { UnauthorizedError, ForbiddenError } from '@bytelyst/errors';
 
 export type Role = 'viewer' | 'admin' | 'super_admin';
 
+const JWT_ISSUER = 'bytelyst-platform';
+
 export interface JwtPayload {
   sub: string;
   role?: Role;
@@ -22,6 +25,11 @@ declare module 'fastify' {
   }
 }
 
+export async function verifyJwtToken(token: string, secret: Uint8Array): Promise<JwtPayload> {
+  const { payload } = await jwtVerify(token, secret, { issuer: JWT_ISSUER });
+  return payload as JwtPayload;
+}
+
 export function requireAuth(req: AuthRequest): JwtPayload {
   if (!req.jwtPayload?.sub) throw new UnauthorizedError('Authentication required');
   return req.jwtPayload as JwtPayload;
diff --git a/services/mcp-server/src/server.ts b/services/mcp-server/src/server.ts
index 9b9074b1..99a9fdab 100644
--- a/services/mcp-server/src/server.ts
+++ b/services/mcp-server/src/server.ts
@@ -25,8 +25,7 @@
 
 import { createServiceApp, registerOptionalJwtContext, startService } from '@bytelyst/fastify-core';
 import { config } from './lib/config.js';
-import { JwtPayload } from './lib/auth.js';
-import { jwtVerify } from 'jose';
+import { JwtPayload, verifyJwtToken } from './lib/auth.js';
 import { toolRoutes } from './modules/tools/routes.js';
 
 // Register all tool namespaces (side-effect: populates the tool registry)
@@ -89,10 +88,7 @@ const app = await createServiceApp({
 const jwtSecret = new TextEncoder().encode(config.JWT_SECRET);
 
 await registerOptionalJwtContext(app, {
-  verifyToken: async (token: string) => {
-    const { payload } = await jwtVerify(token, jwtSecret);
-    return payload as JwtPayload;
-  },
+  verifyToken: async (token: string) => verifyJwtToken(token, jwtSecret) as Promise<JwtPayload>,
 });
 
 // Register tool routes
diff --git a/services/platform-service/src/server.test.ts b/services/platform-service/src/server.test.ts
index fc326760..c9c4e056 100644
--- a/services/platform-service/src/server.test.ts
+++ b/services/platform-service/src/server.test.ts
@@ -7,6 +7,10 @@ const startServiceMock = vi.fn(async () => undefined);
 const loadProductCacheMock = vi.fn(async () => undefined);
 const initCosmosIfNeededMock = vi.fn(async () => undefined);
 const verifyTokenMock = vi.fn(async () => ({ sub: 'user_1', productId: 'lysnrai' }));
+const seedDefaultFlagsMock = vi.fn(async () => undefined);
+const runPendingMigrationsMock = vi.fn(async () => undefined);
+const registerDiagnosticsSubscribersMock = vi.fn();
+const startTriggerEvaluationJobMock = vi.fn();
 
 const appMock = {
   register: vi.fn(async () => undefined),
@@ -62,6 +66,14 @@ vi.mock('./modules/themes/routes.js', () => ({ themeRoutes: vi.fn() }));
 vi.mock('./lib/cosmos-init.js', () => ({ initCosmosIfNeeded: initCosmosIfNeededMock }));
 vi.mock('./lib/config.js', () => ({ config: { CORS_ORIGIN: '*', PORT: 4003, HOST: '0.0.0.0' } }));
 vi.mock('./modules/auth/jwt.js', () => ({ verifyToken: verifyTokenMock }));
+vi.mock('./modules/flags/seed.js', () => ({ seedDefaultFlags: seedDefaultFlagsMock }));
+vi.mock('./migrations/runner.js', () => ({ runPendingMigrations: runPendingMigrationsMock }));
+vi.mock('./modules/diagnostics/subscribers.js', () => ({
+  registerDiagnosticsSubscribers: registerDiagnosticsSubscribersMock,
+}));
+vi.mock('./modules/diagnostics/trigger-job.js', () => ({
+  startTriggerEvaluationJob: startTriggerEvaluationJobMock,
+}));
 
 describe('server bootstrap', () => {
   beforeEach(() => {
@@ -80,6 +92,10 @@ describe('server bootstrap', () => {
     expect(loadProductCacheMock).toHaveBeenCalledOnce();
     expect(createServiceAppMock).toHaveBeenCalledOnce();
     expect(registerOptionalJwtContextMock).toHaveBeenCalledOnce();
+    expect(runPendingMigrationsMock).toHaveBeenCalledOnce();
+    expect(seedDefaultFlagsMock).toHaveBeenCalledOnce();
+    expect(registerDiagnosticsSubscribersMock).toHaveBeenCalledOnce();
+    expect(startTriggerEvaluationJobMock).toHaveBeenCalledOnce();
     expect(appMock.register).toHaveBeenCalled();
     expect(appMock.register.mock.calls.length).toBeGreaterThan(15);
     expect(startServiceMock).toHaveBeenCalledWith(appMock, { port: 4003, host: '0.0.0.0' });
diff --git a/services/platform-service/src/server.ts b/services/platform-service/src/server.ts
index 2e25dc85..5d896b42 100644
--- a/services/platform-service/src/server.ts
+++ b/services/platform-service/src/server.ts
@@ -73,9 +73,11 @@ import { marketplaceRoutes } from './modules/marketplace/routes.js';
 import { predictiveAnalyticsRoutes } from './modules/predictive-analytics/routes.js';
 import { initCosmosIfNeeded } from './lib/cosmos-init.js';
 import { config } from './lib/config.js';
+import type { JwtPayload } from './lib/request-context.js';
 import { seedDefaultFlags } from './modules/flags/seed.js';
 import { runPendingMigrations } from './migrations/runner.js';
 import { registerDiagnosticsSubscribers } from './modules/diagnostics/subscribers.js';
+import { verifyToken } from './modules/auth/jwt.js';
 
 await initCosmosIfNeeded();
 await loadProductCache();
@@ -103,9 +105,6 @@ const app = await createServiceApp({
   metrics: true,
 });
 
-import { verifyToken } from './modules/auth/jwt.js';
-import type { JwtPayload } from './lib/request-context.js';
-
 await registerOptionalJwtContext(app, {
   verifyToken: async token => (await verifyToken(token)) as JwtPayload,
 });