# WaitlistDestinationBackfillCount

> How many signups a destination backfill would push. Read access, waitlists toolset, MCP tool get_waitlist_destination_backfill_count.

**Access:** [Read](https://developer.missin.co.uk/get-started/authentication.md#access-levels)

## Variables

| Variable | Type | Required | Accepts | Description |
|---|---|---|---|---|
| `id` | `UUID!` | yes |  |  |

## Call it

```bash curl
curl https://api.missin.co.uk/graphql/v1 \
  -H "Authorization: Bearer $MISSIN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"operationName":"WaitlistDestinationBackfillCount","variables":{"id":"00000000-0000-0000-0000-000000000000"},"extensions":{"persistedQuery":{"version":1,"sha256Hash":"3ca7f3c11ee455404669ea2a5aa8995fb5d06d0d6091fb9d1ff45fbd1bd905e0"}}}'
```

## Document

```graphql
query WaitlistDestinationBackfillCount($id: UUID!) { __typename waitlistDestinationBackfillCount(id: $id) { __typename count userErrors { __typename code field message } } }
```

Source: https://developer.missin.co.uk/reference/waitlists/waitlist-destination-backfill-count