Update a market

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

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

// `country_isos` is a full-set update — the market is reconciled to match
// the array (adds new countries, removes ones not present). Setting
// `default: true` demotes the previous default market in the store.
const market = await client.markets.update('market_UkLWZg9DAJ', {
  name: 'European Union',
  tax_inclusive: true,
  country_isos: ['DE', 'FR'],
})

spree api patch /markets/{id} -d '{"name":"European Union","tax_inclusive":true,"country_isos":["DE","FR"]}'

{
  "id": "mkt_UkLWZg9DAJ",
  "name": "European Union",
  "currency": "USD",
  "default_locale": "en",
  "tax_inclusive": true,
  "default": false,
  "country_isos": [
    "DE"
  ],
  "supported_locales": [
    "en"
  ],
  "created_at": "2026-07-24T18:11:09.540Z",
  "updated_at": "2026-07-24T18:11:09.849Z"
}

{
  "error": {
    "code": "validation_error",
    "message": "Name can't be blank",
    "details": {
      "name": [
        "can't be blank"
      ]
    }
  }
}