diff --git a/README.md b/README.md
index 71054482..1662a0ca 100644
--- a/README.md
+++ b/README.md
@@ -227,7 +227,7 @@ The tray is currently in beta. Feedback is highly appreciated at [github.com/onl
 
 **Push notifications (Beta)** -- Receive browser push notifications when quotas cross thresholds. onWatch is a PWA (Progressive Web App) - install it from your browser for a native app experience. Uses Web Push protocol (VAPID) with zero external dependencies. Configure delivery channels (email, push, webhook, or any combination) per your preference.
 
-**Webhook notifications (Beta)** -- POST a JSON payload to any HTTP endpoint on warning, critical, reset, auth error, and Codex quota-starter events. Works with ntfy, Gotify, and custom services, with optional bearer-token auth and custom headers. Payloads never contain credentials. See [docs/WEBHOOK_SETUP.md](docs/WEBHOOK_SETUP.md).
+**Webhook notifications (Beta)** -- POST a JSON payload to any HTTP endpoint on warning, critical, reset, auth error, Codex quota-starter, and banked Codex reset expiry events. Works with ntfy, Gotify, and custom services, with optional bearer-token auth and custom headers. Payloads never contain credentials. See [docs/WEBHOOK_SETUP.md](docs/WEBHOOK_SETUP.md).
 
 **Dark/Light mode** -- Toggle via sun/moon icon in the header. Auto-detects system preference on first visit and persists your choice across sessions.
 
diff --git a/docs/WEBHOOK_SETUP.md b/docs/WEBHOOK_SETUP.md
index dc60c4f9..02a417ab 100644
--- a/docs/WEBHOOK_SETUP.md
+++ b/docs/WEBHOOK_SETUP.md
@@ -38,8 +38,13 @@ The test button uses the *saved* configuration, so save before testing.
 | `auth_error` | A provider token refresh or authentication fails |
 | `starter_success` | The Codex auto quota-starter successfully started a limit window |
 | `starter_failure` | The Codex auto quota-starter ping failed |
+| `reset_credit_expiry` | A banked Codex reset expires within 24 hours |
 | `test` | You press **Send Test Webhook** |
 
+A newly added event is off for webhooks that already exist: its stored value is
+absent, and only `warning` and `critical` default on. Tick it once under
+**Webhook Configuration** and save.
+
 ## Payload
 
 `POST` with `Content-Type: application/json`:
@@ -62,7 +67,9 @@ The test button uses the *saved* configuration, so save before testing.
 
 Optional fields are omitted rather than sent as zero. `reset_at` appears only
 when the provider reports a reset time. `quota_key`, `utilization`, `limit`, and
-`threshold` are absent on auth-error and starter events.
+`threshold` are absent on auth-error and starter events. On
+`reset_credit_expiry`, `quota_key` is the reset credit ID and `reset_at` is the
+expiry time.
 
 **The payload never contains credentials** - no OAuth tokens, API keys, or the
 webhook bearer token itself.