---
title: "customer.imported"
description: "QuotaStack sends this when an import makes a customer, and only when the import asks for events. Set `options.emit_webhooks: true` to get it."
---

# customer.imported

Customer imported via legacy cutover.

## When it fires

QuotaStack sends this when an import makes a customer, and only when the import asks for events. Set `options.emit_webhooks: true` to get it.

## When it does not fire

QuotaStack sends nothing when `emit_webhooks` is left out. That is how every import starts. An import is quiet by default, so moving 10,000 customers cannot flood your endpoint.

## Payload — `data`

| Field | Type | Required | Meaning |
|---|---|---|---|
| `id` | string (uuid) | required | QuotaStack-assigned customer UUID. |
| `tenant_id` | string (uuid) | required |  |
| `environment` | string | required | Which environment this resource lives in. Determined by the API key prefix used (`qs_live_…` → live, `qs_test_…` → sandbox). `live` `sandbox` |
| `external_id` | string | required | Your identifier for this customer. |
| `display_name` | string | optional | Optional human label shown in dashboards. |
| `overage_policy` | string | optional | Overrides the tenant default when set. `block` — refuse usage beyond spendable balance. `allow` — permit usage beyond balance; the spendable balance floors at zero and the excess is recorded as overage (see the consume `overage` field) for arrears billing. `notify` — currently identical to `allow`. No webhook is emitted yet; tracked as workspace#90. `block` `allow` `notify` `null` |
| `low_balance_threshold_mc` | integer (int64) | optional | Optional per-customer override for the `credit.low_balance` webhook threshold (millicredits). `null` inherits the tenant default (`tenant_configs.low_balance_threshold_mc`, default 0 = off). `0` disables low_balance for this customer only. `credit.exhausted` is always evaluated and ignores this field. Range: 0–∞. |
| `metadata` | object | required | Free-form key-value tags. |
| `created_at` | string (date-time) | required |  |
| `updated_at` | string (date-time) | required |  |

### Example payload

```json
{
  "event_id": "0192f5a4-7c31-7b8e-9a2d-4f6c8e1b3a51",
  "event_type": "customer.imported",
  "tenant_id": "0192f5a4-7c31-7b8e-9a2d-4f6c8e1b3a01",
  "environment": "live",
  "customer_id": "0192f5a4-7c31-7b8e-9a2d-4f6c8e1b3a05",
  "external_customer_id": "user_42",
  "created_at": "2026-07-28T09:00:00Z",
  "idempotency_key": "import:user_42",
  "data": {
    "id": "0192f5a4-7c31-7b8e-9a2d-4f6c8e1b3a05",
    "external_id": "user_42",
    "display_name": "Ada Lovelace",
    "environment": "live"
  }
}
```

## What to do

Match the customer to the record you hold, by `external_id`.

## Which calls fire this

- [`POST /v1/imports/customers`](/docs/api/imports#importCustomer)

## See also

- [Importing existing customers](/docs/cookbook/import-existing-customers)
- [Imports](/docs/api/imports)

## Delivery

QuotaStack guarantees **at-least-once** delivery. An event may be delivered more than once if your endpoint returns a non-2xx response, the connection fails, or the request exceeds the delivery timeout.

**Delivery timeout:** 5 seconds per attempt. If your endpoint does not return a 2xx within 5 seconds, the attempt is treated as a failure and retried. Not configurable today.

**One webhook URL per tenant.** Multiple URLs and per-event routing are not supported. Configure the URL via the tenant config endpoint.

### Retry schedule

If delivery fails (non-2xx response, timeout, or network error), QuotaStack retries with exponential backoff:

| Attempt | Delay after previous |
|---|---|
| 1 | Immediate |
| 2 | 30 seconds |
| 3 | 5 minutes |
| 4 | 30 minutes |
| 5 | 2 hours |
| 6 | 8 hours |
| 7 | 24 hours |

After 7 failed attempts, the event is moved to a dead letter queue. Dead-lettered events are not lost — you can requeue them yourself, from the dashboard (Activity → Webhooks → Redeliver) or the API:

```bash
curl -X POST https://api.quotastack.io/v1/webhooks/events/{event_id}/redeliver \
  -H "X-API-Key: $QS_KEY" \
  -H "Idempotency-Key: redeliver:{event_id}"
```

Redelivery resets the event to `pending` with a fresh retry schedule (7 new attempts). The next attempt signs with your **current** secret — useful when the event dead-lettered because of a secret rotation or an endpoint outage you have since fixed. Only `dead_letter` events can be redelivered; the call returns `409` for events in any other status.

### Handling duplicates

Because delivery is at-least-once, your webhook handler should be idempotent. Use the `webhook-id` header for deduplication — if you have already processed an event with that ID, return 200 and skip processing.