Get a customer group

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

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

// Pass `expand: ['customers']` to embed the group's customers in the response
// — omit it for the much smaller index-payload shape.
const group = await client.customerGroups.get('cg_UkLWZg9DAJ', { expand: ['customers'] })

spree api get /customer_groups/{id} -d '{"expand":["customers"]}'

{
  "id": "cg_UkLWZg9DAJ",
  "name": "VIPs",
  "description": "Top spenders",
  "customers_count": 1,
  "created_at": "2026-07-26T14:24:21.966Z",
  "updated_at": "2026-07-26T14:24:21.966Z",
  "customers": [
    {
      "id": "cus_UkLWZg9DAJ",
      "email": "terese@feest.info",
      "first_name": "Dyan",
      "last_name": "Hansen",
      "phone": null,
      "accepts_email_marketing": false,
      "full_name": "Dyan Hansen",
      "available_store_credit_total": "0",
      "display_available_store_credit_total": "$0.00",
      "login": "terese@feest.info",
      "metadata": {},
      "last_sign_in_at": null,
      "current_sign_in_at": null,
      "created_at": "2026-07-26T14:24:22.227Z",
      "updated_at": "2026-07-26T14:24:22.227Z",
      "sign_in_count": 0,
      "failed_attempts": 0,
      "last_sign_in_ip": null,
      "current_sign_in_ip": null,
      "tags": [],
      "internal_note_html": null,
      "default_billing_address_id": null,
      "default_shipping_address_id": null,
      "orders_count": 0,
      "total_spent": "0.0",
      "display_total_spent": "$0.00",
      "last_order_completed_at": null,
      "customer_group_ids": [
        "cg_UkLWZg9DAJ"
      ]
    }
  ]
}

{
  "error": {
    "code": "record_not_found",
    "message": "Customer group not found"
  }
}