import { createAdminClient } from '@spree/admin-sdk'

const client = createAdminClient({
  baseUrl: 'https://your-store.com',
  secretKey: 'sk_xxx',
})

// `members` replaces the zone's full member set.
const deliveryZone = await client.deliveryZones.update('dz_UkLWZg9DAJ', {
  name: 'US East Coast',
  members: [
    {
      member_type: 'postal_code',
      country_code: 'US',
      postal_code_from: '10000',
      postal_code_to: '14999',
    },
  ],
})

spree api patch /delivery_zones/{id} -d '{"name":"US East Coast","members":[{"member_type":"postal_code","country_code":"US","postal_code_from":"10000","postal_code_to":"14999"}]}'

{
  "id": "dz_UkLWZg9DAJ",
  "name": "US East Coast",
  "description": "Omnis ipsam provident laboriosam est.",
  "members": [
    {
      "id": "dzm_UkLWZg9DAJ",
      "member_type": "postal_code",
      "country_code": "US",
      "state_code": null,
      "postal_code_prefix": null,
      "postal_code_from": "10000",
      "postal_code_to": "14999",
      "country_name": "United States",
      "state_name": null,
      "created_at": "2026-01-15T12:00:00.000Z",
      "updated_at": "2026-01-15T12:00:00.000Z"
    }
  ],
  "created_at": "2026-01-15T12:00:00.000Z",
  "updated_at": "2026-01-15T12:00:00.000Z",
  "delivery_profile_id": "fp_UkLWZg9DAJ",
  "delivery_origin_group_id": "og_UkLWZg9DAJ",
  "delivery_method_ids": []
}