diff --git a/packages/outpost/queue/src/__tests__/scheduler.test.ts b/packages/outpost/queue/src/__tests__/scheduler.test.ts
index e6e8471..79574fc 100644
--- a/packages/outpost/queue/src/__tests__/scheduler.test.ts
+++ b/packages/outpost/queue/src/__tests__/scheduler.test.ts
@@ -1,7 +1,24 @@
-import { describe, it, expect } from 'vitest';
-import { DEFAULT_SCHEDULED_JOBS } from '../scheduler.js';
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+
+const { mockPrisma, mockCreateJob } = vi.hoisted(() => ({
+    mockPrisma: { job: { findFirst: vi.fn() } },
+    mockCreateJob: vi.fn(),
+}));
+
+vi.mock('@copilotkit/outpost/db', () => ({
+    prisma: mockPrisma,
+}));
+
+vi.mock('../create-job.js', () => ({
+    createJob: mockCreateJob,
+}));
+
+import { DEFAULT_SCHEDULED_JOBS, Scheduler, resolveScheduledJobs } from '../scheduler.js';
 import { JobType } from '../types.js';
 
+const HUBSPOT_SKIP_LINE =
+    '[Scheduler] Skipping HUBSPOT_SYNC: HUBSPOT_API_KEY is not set (set it to enable the HubSpot sync)';
+
 describe('DEFAULT_SCHEDULED_JOBS', () => {
     it('includes GITHUB_REACTION_POLL in the default scheduled jobs at a 24 hour interval', () => {
         const definition = DEFAULT_SCHEDULED_JOBS.find(
@@ -22,3 +39,87 @@ describe('DEFAULT_SCHEDULED_JOBS', () => {
         expect(definition!.intervalMs).toBe(5 * 60 * 1000);
     });
 });
+
+describe('resolveScheduledJobs', () => {
+    let logSpy: ReturnType<typeof vi.spyOn>;
+
+    beforeEach(() => {
+        logSpy = vi.spyOn(console, 'log').mockImplementation(() => {});
+    });
+
+    afterEach(() => {
+        logSpy.mockRestore();
+    });
+
+    it.each([
+        ['unset', {}],
+        ['empty', { HUBSPOT_API_KEY: '' }],
+        ['whitespace-only', { HUBSPOT_API_KEY: '   ' }],
+    ])('drops HUBSPOT_SYNC and logs one skip line when HUBSPOT_API_KEY is %s', (_label, env) => {
+        // Without a key every HUBSPOT_SYNC run fails at client construction and
+        // dead-letters, so the job is not scheduled at all.
+        const definitions = resolveScheduledJobs(DEFAULT_SCHEDULED_JOBS, env);
+
+        expect(definitions.map((d) => d.type)).not.toContain(JobType.HUBSPOT_SYNC);
+        expect(definitions).toHaveLength(DEFAULT_SCHEDULED_JOBS.length - 1);
+        expect(logSpy).toHaveBeenCalledTimes(1);
+        expect(logSpy).toHaveBeenCalledWith(HUBSPOT_SKIP_LINE);
+    });
+
+    it('keeps every default job, HUBSPOT_SYNC included, when HUBSPOT_API_KEY is set', () => {
+        const definitions = resolveScheduledJobs(DEFAULT_SCHEDULED_JOBS, {
+            HUBSPOT_API_KEY: 'dummy-key',
+        });
+
+        expect(definitions).toEqual(DEFAULT_SCHEDULED_JOBS);
+        expect(logSpy).not.toHaveBeenCalled();
+    });
+});
+
+describe('Scheduler default definitions', () => {
+    const savedKey = process.env.HUBSPOT_API_KEY;
+    let logSpy: ReturnType<typeof vi.spyOn>;
+
+    beforeEach(() => {
+        logSpy = vi.spyOn(console, 'log').mockImplementation(() => {});
+        mockPrisma.job.findFirst.mockReset().mockResolvedValue(null);
+        mockCreateJob.mockReset().mockResolvedValue('job-id');
+    });
+
+    afterEach(() => {
+        logSpy.mockRestore();
+        if (savedKey === undefined) delete process.env.HUBSPOT_API_KEY;
+        else process.env.HUBSPOT_API_KEY = savedKey;
+    });
+
+    async function startAndCollectCreatedTypes(): Promise<string[]> {
+        const scheduler = new Scheduler();
+        scheduler.start();
+        scheduler.stop();
+        // start() fires each tick without awaiting; let them settle.
+        await vi.waitFor(() =>
+            expect(mockCreateJob).toHaveBeenCalledTimes(mockPrisma.job.findFirst.mock.calls.length),
+        );
+        return mockCreateJob.mock.calls.map((call) => call[0] as string);
+    }
+
+    it('never creates a HUBSPOT_SYNC job when HUBSPOT_API_KEY is unset', async () => {
+        delete process.env.HUBSPOT_API_KEY;
+
+        const created = await startAndCollectCreatedTypes();
+
+        expect(created).not.toContain(JobType.HUBSPOT_SYNC);
+        expect(created).toHaveLength(DEFAULT_SCHEDULED_JOBS.length - 1);
+        expect(logSpy).toHaveBeenCalledWith(HUBSPOT_SKIP_LINE);
+    });
+
+    it('creates a HUBSPOT_SYNC job as before when HUBSPOT_API_KEY is set', async () => {
+        process.env.HUBSPOT_API_KEY = 'dummy-key';
+
+        const created = await startAndCollectCreatedTypes();
+
+        expect(created).toContain(JobType.HUBSPOT_SYNC);
+        expect(created).toHaveLength(DEFAULT_SCHEDULED_JOBS.length);
+        expect(logSpy).not.toHaveBeenCalledWith(HUBSPOT_SKIP_LINE);
+    });
+});
diff --git a/packages/outpost/queue/src/scheduler.ts b/packages/outpost/queue/src/scheduler.ts
index ca50116..06fee87 100644
--- a/packages/outpost/queue/src/scheduler.ts
+++ b/packages/outpost/queue/src/scheduler.ts
@@ -57,6 +57,26 @@ export const DEFAULT_SCHEDULED_JOBS: ScheduledJobDefinition[] = [
     },
 ];
 
+/**
+ * Drop scheduled jobs whose required configuration is missing.
+ *
+ * HUBSPOT_SYNC needs HUBSPOT_API_KEY: without it every run fails at client
+ * construction and dead-letters. It is left out of the schedule (so no job rows
+ * are created) and one startup line says so. Setting the key re-enables it on
+ * the next start.
+ */
+export function resolveScheduledJobs(
+    definitions: ScheduledJobDefinition[] = DEFAULT_SCHEDULED_JOBS,
+    env: NodeJS.ProcessEnv = process.env,
+): ScheduledJobDefinition[] {
+    if (env.HUBSPOT_API_KEY?.trim()) return definitions;
+
+    console.log(
+        '[Scheduler] Skipping HUBSPOT_SYNC: HUBSPOT_API_KEY is not set (set it to enable the HubSpot sync)',
+    );
+    return definitions.filter((d) => d.type !== JobType.HUBSPOT_SYNC);
+}
+
 /**
  * A simple interval-based scheduler that creates recurring jobs.
  *
@@ -70,7 +90,7 @@ export class Scheduler {
     private running = false;
 
     constructor(definitions?: ScheduledJobDefinition[]) {
-        this.definitions = definitions ?? DEFAULT_SCHEDULED_JOBS;
+        this.definitions = definitions ?? resolveScheduledJobs();
     }
 
     /**