request(
    "GET",
    "/v1/custody/mpc/list_spendable/",
    {
        "coin": "BTC",
        "address": ""
    },
    api_key, api_secret, host
)

coboFetch('GET', '/v1/custody/mpc/list_spendable/', {
    "coin": "BTC",
    "address": ""
}, api_key, api_secret, host)
    .then(res => {
        res.json().then((data)=>{
            console.log(JSON.stringify(data, null, 4));
        })
    }).catch(err => {
        console.log(err)
    });

Request("GET", "/v1/custody/mpc/list_spendable/", map[string]string{
    "coin": "BTC",
    "address": ""
})

{
  "success": true,
  "result": {
    'utxos': [{
      'tx_hash': 'dd7e1cecf6bbde1844ee1815b780711a1e306a718bcd23cd64401b48ef88eb83',
      'vout_n': 0,
      'address': '2N2xFZtbCFB6Nb3Pj9Sxsx5mX2fxX3yEgkE',
      'amount': 100000,
      'is_coinbase': False,
      'confirmed_number': 66716
    }, {
      'tx_hash': 'dd7e1cecf6bbde1844ee1815b780711a1e306a718bcd23cd64401b48ef88eb83',
      'vout_n': 1,
      'address': '2N2xFZtbCFB6Nb3Pj9Sxsx5mX2fxX3yEgkE',
      'amount': 99270,
      'is_coinbase': False,
      'confirmed_number': 66716
    }]
  }
}