diff --git a/src/modules/webhooks/webhook-event-filter.integration.test.ts b/src/modules/webhooks/webhook-event-filter.integration.test.ts
new file mode 100644
index 0000000..19d5c94
--- /dev/null
+++ b/src/modules/webhooks/webhook-event-filter.integration.test.ts
@@ -0,0 +1,178 @@
+// Integration test: webhook event type filter enforced at delivery time (#461)
+//
+// Verifies that:
+//   1. A buy-only webhook does NOT fire when a sell event occurs
+//   2. A buy-only webhook DOES fire when a buy event occurs
+//   3. A sell-only webhook does NOT fire when a buy event occurs
+//   4. A sell-only webhook DOES fire when a sell event occurs
+
+import { prisma } from '../../utils/prisma.utils';
+import { Keypair } from '@stellar/stellar-base';
+
+const keypair = Keypair.random();
+const walletAddress = keypair.publicKey();
+const testUserId = 'webhook-filter-test-user';
+const creatorId = 'webhook-filter-test-creator';
+
+const BASE_TRADE = {
+  creatorId,
+  buyerOrSellerAddress: 'GDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDH',
+  amount: '10',
+  price: '5.0',
+  feePaid: '0.25',
+  timestamp: new Date().toISOString(),
+};
+
+beforeAll(async () => {
+  await prisma.user.create({
+    data: {
+      id: testUserId,
+      email: 'webhook-filter-test@example.com',
+      passwordHash: 'dummy-hash',
+      firstName: 'Filter',
+      lastName: 'Test',
+    },
+  });
+  await prisma.stellarWallet.create({
+    data: { address: walletAddress, userId: testUserId },
+  });
+  await prisma.creatorProfile.create({
+    data: {
+      id: creatorId,
+      userId: testUserId,
+      handle: 'filter-test-creator',
+      displayName: 'Filter Test Creator',
+    },
+  });
+});
+
+afterAll(async () => {
+  await prisma.webhookEvent.deleteMany({ where: { webhook: { creatorId } } });
+  await prisma.webhook.deleteMany({ where: { creatorId } });
+  await prisma.creatorProfile.deleteMany({ where: { id: creatorId } });
+  await prisma.stellarWallet.deleteMany({ where: { userId: testUserId } });
+  await prisma.user.deleteMany({ where: { id: testUserId } });
+});
+
+describe('Webhook event type filter — buy-only webhook', () => {
+  let buyOnlyWebhookId: string;
+
+  beforeEach(async () => {
+    const wh = await prisma.webhook.create({
+      data: {
+        creatorId,
+        callbackUrl: 'https://example.com/callback',
+        events: { set: ['BUY'] },
+      },
+    });
+    buyOnlyWebhookId = wh.id;
+  });
+
+  afterEach(async () => {
+    await prisma.webhookEvent.deleteMany({ where: { webhookId: buyOnlyWebhookId } });
+    await prisma.webhook.delete({ where: { id: buyOnlyWebhookId } });
+  });
+
+  it('does NOT create a WebhookEvent record when a sell event occurs (buy-only filter)', async () => {
+    const { dispatchWebhookEvent } = await import('./webhook.service');
+
+    await dispatchWebhookEvent({ ...BASE_TRADE, type: 'sell' });
+
+    const events = await prisma.webhookEvent.findMany({
+      where: { webhookId: buyOnlyWebhookId, eventType: 'SELL' },
+    });
+    expect(events).toHaveLength(0);
+  });
+
+  it('DOES create a WebhookEvent record when a buy event occurs (buy-only filter)', async () => {
+    const { dispatchWebhookEvent } = await import('./webhook.service');
+
+    await dispatchWebhookEvent({ ...BASE_TRADE, type: 'buy' });
+
+    const events = await prisma.webhookEvent.findMany({
+      where: { webhookId: buyOnlyWebhookId, eventType: 'BUY' },
+    });
+    expect(events.length).toBeGreaterThan(0);
+    expect(events[0].eventType).toBe('BUY');
+  });
+});
+
+describe('Webhook event type filter — sell-only webhook', () => {
+  let sellOnlyWebhookId: string;
+
+  beforeEach(async () => {
+    const wh = await prisma.webhook.create({
+      data: {
+        creatorId,
+        callbackUrl: 'https://example.com/callback',
+        events: { set: ['SELL'] },
+      },
+    });
+    sellOnlyWebhookId = wh.id;
+  });
+
+  afterEach(async () => {
+    await prisma.webhookEvent.deleteMany({ where: { webhookId: sellOnlyWebhookId } });
+    await prisma.webhook.delete({ where: { id: sellOnlyWebhookId } });
+  });
+
+  it('does NOT create a WebhookEvent record when a buy event occurs (sell-only filter)', async () => {
+    const { dispatchWebhookEvent } = await import('./webhook.service');
+
+    await dispatchWebhookEvent({ ...BASE_TRADE, type: 'buy' });
+
+    const events = await prisma.webhookEvent.findMany({
+      where: { webhookId: sellOnlyWebhookId, eventType: 'BUY' },
+    });
+    expect(events).toHaveLength(0);
+  });
+
+  it('DOES create a WebhookEvent record when a sell event occurs (sell-only filter)', async () => {
+    const { dispatchWebhookEvent } = await import('./webhook.service');
+
+    await dispatchWebhookEvent({ ...BASE_TRADE, type: 'sell' });
+
+    const events = await prisma.webhookEvent.findMany({
+      where: { webhookId: sellOnlyWebhookId, eventType: 'SELL' },
+    });
+    expect(events.length).toBeGreaterThan(0);
+    expect(events[0].eventType).toBe('SELL');
+  });
+});
+
+describe('Webhook event type filter — cross-isolation', () => {
+  it('buy-only webhook and sell-only webhook co-exist — each receives only their event', async () => {
+    const buyWh = await prisma.webhook.create({
+      data: { creatorId, callbackUrl: 'https://example.com/buy', events: { set: ['BUY'] } },
+    });
+    const sellWh = await prisma.webhook.create({
+      data: { creatorId, callbackUrl: 'https://example.com/sell', events: { set: ['SELL'] } },
+    });
+
+    const { dispatchWebhookEvent } = await import('./webhook.service');
+
+    // Fire a buy
+    await dispatchWebhookEvent({ ...BASE_TRADE, type: 'buy' });
+
+    const buyEvents = await prisma.webhookEvent.findMany({ where: { webhookId: buyWh.id } });
+    const sellEventsOnBuyFire = await prisma.webhookEvent.findMany({ where: { webhookId: sellWh.id } });
+
+    expect(buyEvents.length).toBeGreaterThan(0);
+    expect(sellEventsOnBuyFire).toHaveLength(0);
+
+    // Fire a sell
+    await dispatchWebhookEvent({ ...BASE_TRADE, type: 'sell' });
+
+    const sellEvents = await prisma.webhookEvent.findMany({ where: { webhookId: sellWh.id } });
+    const buyEventsOnSellFire = await prisma.webhookEvent.findMany({
+      where: { webhookId: buyWh.id, eventType: 'SELL' },
+    });
+
+    expect(sellEvents.length).toBeGreaterThan(0);
+    expect(buyEventsOnSellFire).toHaveLength(0);
+
+    // cleanup
+    await prisma.webhookEvent.deleteMany({ where: { webhookId: { in: [buyWh.id, sellWh.id] } } });
+    await prisma.webhook.deleteMany({ where: { id: { in: [buyWh.id, sellWh.id] } } });
+  });
+});