diff --git a/apps/sim/app/api/memory/[id]/route.test.ts b/apps/sim/app/api/memory/[id]/route.test.ts
new file mode 100644
index 00000000000..a5179c9a6e4
--- /dev/null
+++ b/apps/sim/app/api/memory/[id]/route.test.ts
@@ -0,0 +1,91 @@
+/**
+ * @vitest-environment node
+ */
+
+import { memory } from '@sim/db/schema'
+import {
+  createMockRequest,
+  hybridAuthMockFns,
+  queueTableRows,
+  resetDbChainMock,
+} from '@sim/testing'
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+import { AuthType } from '@/lib/auth/hybrid'
+import {
+  PRIVATE_TOOL_METADATA_REQUEST_HEADER,
+  PRIVATE_TOOL_METADATA_RESPONSE_HEADER,
+  RESOLVED_SECRET_PROVENANCE_FIELD,
+  RESOLVED_SECRET_PROVENANCE_METADATA_V1,
+} from '@/lib/execution/private-tool-metadata'
+
+const { mockCheckWorkspaceAccess } = vi.hoisted(() => ({
+  mockCheckWorkspaceAccess: vi.fn(),
+}))
+
+vi.mock('@/lib/workspaces/permissions/utils', () => ({
+  checkWorkspaceAccess: mockCheckWorkspaceAccess,
+}))
+
+import { GET } from '@/app/api/memory/[id]/route'
+
+const WORKSPACE_ID = '11111111-1111-4111-8111-111111111111'
+const CONTEXT = { params: Promise.resolve({ id: 'missing-conversation' }) }
+
+describe('GET /api/memory/[id]', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+    resetDbChainMock()
+    hybridAuthMockFns.mockCheckInternalAuth.mockResolvedValue({
+      success: true,
+      userId: 'user-1',
+      authType: AuthType.INTERNAL_JWT,
+    })
+    mockCheckWorkspaceAccess.mockResolvedValue({ exists: true, hasAccess: true })
+    queueTableRows(memory, [])
+  })
+
+  it('returns verified exact-empty metadata when a tool lookup has no matching memory', async () => {
+    const response = await GET(
+      createMockRequest(
+        'GET',
+        undefined,
+        {
+          [PRIVATE_TOOL_METADATA_REQUEST_HEADER]: RESOLVED_SECRET_PROVENANCE_METADATA_V1,
+        },
+        `http://localhost:3000/api/memory/missing-conversation?workspaceId=${WORKSPACE_ID}`
+      ),
+      CONTEXT
+    )
+
+    expect(response.status).toBe(200)
+    expect(response.headers.get(PRIVATE_TOOL_METADATA_RESPONSE_HEADER)).toBe(
+      RESOLVED_SECRET_PROVENANCE_METADATA_V1
+    )
+    expect(await response.json()).toEqual({
+      success: true,
+      data: null,
+      [RESOLVED_SECRET_PROVENANCE_FIELD]: {
+        version: 1,
+        complete: true,
+        entries: [],
+        scope: { userId: 'user-1', workspaceId: WORKSPACE_ID },
+      },
+    })
+  })
+
+  it('preserves the existing headerless empty response for ordinary API callers', async () => {
+    const response = await GET(
+      createMockRequest(
+        'GET',
+        undefined,
+        {},
+        `http://localhost:3000/api/memory/missing-conversation?workspaceId=${WORKSPACE_ID}`
+      ),
+      CONTEXT
+    )
+
+    expect(response.status).toBe(200)
+    expect(response.headers.get(PRIVATE_TOOL_METADATA_RESPONSE_HEADER)).toBeNull()
+    expect(await response.json()).toEqual({ success: true, data: null })
+  })
+})
diff --git a/apps/sim/app/api/memory/[id]/route.ts b/apps/sim/app/api/memory/[id]/route.ts
index abf574419b7..6178061ec94 100644
--- a/apps/sim/app/api/memory/[id]/route.ts
+++ b/apps/sim/app/api/memory/[id]/route.ts
@@ -91,7 +91,14 @@ export const GET = withRouteHandler(async (request: NextRequest, context: Memory
       .limit(1)
 
     if (memories.length === 0) {
-      return NextResponse.json({ success: true, data: null }, { status: 200 })
+      return createMemoryResponse({
+        request,
+        authType: accessCheck.authType,
+        userId: accessCheck.userId,
+        workspaceId: validatedWorkspaceId,
+        body: { success: true, data: null },
+        memories: [],
+      })
     }
 
     const mem = memories[0]
diff --git a/apps/sim/lib/api/contracts/memory.ts b/apps/sim/lib/api/contracts/memory.ts
index 34432af0e36..0551959bc59 100644
--- a/apps/sim/lib/api/contracts/memory.ts
+++ b/apps/sim/lib/api/contracts/memory.ts
@@ -116,7 +116,7 @@ export const getMemoryByIdContract = defineRouteContract({
   query: memoryWorkspaceQuerySchema,
   response: {
     mode: 'json',
-    schema: memorySuccessResponseSchema(memoryRecordSchema),
+    schema: memorySuccessResponseSchema(memoryRecordSchema.nullable()),
   },
 })