diff --git a/libs/shared-types/src/lib/WebhookDelivery.ts b/libs/shared-types/src/lib/WebhookDelivery.ts
new file mode 100644
index 0000000..b5191b1
--- /dev/null
+++ b/libs/shared-types/src/lib/WebhookDelivery.ts
@@ -0,0 +1,57 @@
+/** Status of a webhook delivery. Only `pending` and `retrying` can be claimed. */
+export type WebhookDeliveryStatus =
+  | 'pending'
+  | 'retrying'
+  | 'succeeded'
+  | 'failed';
+
+export type WebhookDeliveryAttemptResult =
+  | 'succeeded'
+  | 'http_error'
+  | 'timed_out'
+  | 'network_error';
+
+/** One attempt to deliver an Event to a webhook endpoint. @internal */
+export interface WebhookDeliveryAttempt {
+  /** 1-based position in the delivery's attempt history */
+  attempt_number: number;
+  /** Time the request was sent, in seconds since the Unix epoch */
+  attempted_at: number;
+  /** Time the request finished, in seconds since the Unix epoch */
+  completed_at: number;
+  result: WebhookDeliveryAttemptResult;
+  /** HTTP status, or null when no response was received */
+  http_status: number | null;
+  duration_ms: number;
+  error: string | null;
+  url: string;
+}
+
+/** Delivery of one Event to one webhook endpoint. @internal */
+export interface WebhookDelivery {
+  id: string;
+  object: 'webhook_delivery';
+  event_id: string;
+  webhook_endpoint_id: string;
+  /** Retries stop once the delivery is `succeeded` or `failed` */
+  status: WebhookDeliveryStatus;
+  /** Time the next attempt is due, or null once retries have stopped */
+  next_attempt_at: number | null;
+  delivered_at: number | null;
+  claim_until: number | null;
+  /** Set while a worker holds the claim; a stale token cannot settle the delivery */
+  claim_token: string | null;
+  attempts: WebhookDeliveryAttempt[];
+  /** The platform account that owns the Event. @zoneless_extension */
+  platform_account: string;
+}
+
+/** Result of one bounded retry run. @internal */
+export interface WebhookDeliveryBatch {
+  object: 'webhook_delivery.batch';
+  /** A claim lost to another worker counts here and in none of the outcomes below */
+  processed: number;
+  succeeded: number;
+  retrying: number;
+  failed: number;
+}
diff --git a/libs/shared-types/src/lib/index.ts b/libs/shared-types/src/lib/index.ts
index 2382798..53c402a 100644
--- a/libs/shared-types/src/lib/index.ts
+++ b/libs/shared-types/src/lib/index.ts
@@ -36,4 +36,5 @@ export * from './SubscriptionItem';
 export * from './Telemetry';
 export * from './TopUp';
 export * from './Transfer';
+export * from './WebhookDelivery';
 export * from './WebhookEndpoint';