curl --request GET \
  --url https://nexus.gerowallet.io/api/btc/addresses/{address} \
  --header 'Authorization: Bearer <token>'

{
  "address": "<string>",
  "chainStats": {
    "txCount": 123,
    "fundedTxoCount": 123,
    "fundedTxoSum": 123,
    "spentTxoCount": 123,
    "spentTxoSum": 123
  },
  "mempoolStats": {
    "txCount": 123,
    "fundedTxoCount": 123,
    "fundedTxoSum": 123,
    "spentTxoCount": 123,
    "spentTxoSum": 123
  }
}