diff --git a/src/events/ans-bridge.ts b/src/events/ans-bridge.ts
index c655cb0..c5fc96c 100644
--- a/src/events/ans-bridge.ts
+++ b/src/events/ans-bridge.ts
@@ -173,6 +173,10 @@ const EventPayloadSchemas: Readonly<Record<string, z.ZodType<NotificationPayload
   workers_observability_real_time_issue: IssueNotificationPayload
 }
 
+export function payloadSchemaFor(alertType: string): z.ZodType<NotificationPayload> {
+  return EventPayloadSchemas[alertType] ?? AlertPayload
+}
+
 /**
  * JSON Schema for an event descriptor, in the subset ChatGPT accepts for tool
  * parameters: a plain object schema with no `$schema` and no top-level
@@ -194,7 +198,7 @@ export function alertEventDefinitions(catalog: unknown) {
       description: `${alert.display_name}: ${alert.description}`,
       delivery: ['webhook'],
       inputSchema: descriptorSchema(AlertArguments),
-      payloadSchema: descriptorSchema(EventPayloadSchemas[alert.type])
+      payloadSchema: descriptorSchema(payloadSchemaFor(alert.type))
     }))
 }
 
@@ -495,7 +499,7 @@ export async function forwardAnsWebhook(
   } catch {
     return new Response(null, { status: 400 })
   }
-  const parsed = (EventPayloadSchemas[subscription.alertType] ?? AlertPayload).safeParse(raw)
+  const parsed = payloadSchemaFor(subscription.alertType).safeParse(raw)
   if (!parsed.success) {
     // Shape and failing paths only: alert values can hold customer data.
     console.log(
diff --git a/tests/ans-bridge.test.ts b/tests/ans-bridge.test.ts
index 36e0165..f35775d 100644
--- a/tests/ans-bridge.test.ts
+++ b/tests/ans-bridge.test.ts
@@ -1,7 +1,10 @@
+import { z } from 'zod'
 import { describe, expect, it, vi } from 'vitest'
 import {
   MAX_EVENT_BYTES,
   alertEventDefinitions,
+  AlertPayload,
+  payloadSchemaFor,
   SubscribeParams,
   UnsubscribeParams,
   forwardAnsWebhook,
@@ -233,6 +236,11 @@ describe('ANS synchronous delivery bridge', () => {
     ).toEqual([])
   })
 
+  it('falls back to the generic alert payload for types without their own schema', () => {
+    expect(payloadSchemaFor('universal_ssl_event_type')).toBe(AlertPayload)
+    expect(() => z.toJSONSchema(payloadSchemaFor('universal_ssl_event_type'))).not.toThrow()
+  })
+
   it('does not accept subscriptions to events without an implemented contract', async () => {
     const deps = dependencies()
     deps.loadSubscription = vi.fn(async () => ({