curl --request GET \
  --url https://api.cdp.coinbase.com/platform/v2/accounts/linkable \
  --header 'Authorization: Bearer <token>'

{
  "accounts": [
    {
      "accountId": "account_af2937b0-9846-4fe7-bfe9-ccc22d935114",
      "type": "business"
    }
  ]
}