curl --request GET \
  --url https://api.exchange.coinbase.com/currencies/{currency_id} \
  --header 'cb-access-key: <api-key>' \
  --header 'cb-access-passphrase: <api-key>' \
  --header 'cb-access-sign: <api-key>' \
  --header 'cb-access-timestamp: <api-key>'

{
  "id": "USD",
  "name": "United States Dollar",
  "min_size": "0.01",
  "max_precision": "0.01",
  "status": "online",
  "details": {
    "type": "fiat",
    "symbol": "$",
    "sort_order": 1,
    "push_payment_methods": [
      "bank_wire",
      "fedwire",
      "swift_bank_account",
      "intra_bank_account"
    ],
    "display_name": "US Dollar",
    "group_types": [
      "fiat",
      "usd"
    ]
  }
}