Create an option type

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

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

const optionType = await client.optionTypes.create({
  name: 'color',
  label: 'Color',
  option_values: [
    { name: 'red', label: 'Red' },
    { name: 'navy', label: 'Navy' },
  ],
})

{
  "id": "opt_gbHJdmfrXB",
  "name": "material",
  "label": "Material",
  "position": 2,
  "kind": "dropdown",
  "metadata": {},
  "filterable": true,
  "created_at": "2026-06-17T13:37:02.704Z",
  "updated_at": "2026-06-17T13:37:02.704Z"
}