curl --request GET \
  --url https://api.messari.io/metrics/v1/networks/{networkIdentifier} \
  --header 'X-Messari-API-Key: <api-key>'

{
  "data": {
    "id": "<string>",
    "metrics": {
      "addresses": {
        "activeAddresses": 123,
        "newAddresses": 123,
        "returningAddresses": 123
      },
      "blockProduction": {
        "circulatingMarketcap": 123,
        "estimatedNakamotoCoefficient": 123
      },
      "blocks": {
        "maxBlockNumber": 123,
        "minBlockNumber": 123,
        "totalBlocks": 123
      },
      "contracts": {
        "activeContracts": 123,
        "contractCallGasPayers": 123,
        "contractDeployers": 123,
        "gasSpenders": 123,
        "newContractDeployers": 123,
        "newContractsCalled": 123,
        "newContractsDeployed": 123,
        "returningContractsCalled": 123,
        "totalContractsCalled": 123,
        "uniqueContractCallers": 123
      },
      "fees": {
        "avgFeePerTransaction": 123,
        "feeMedian": 123,
        "feeRevenue": 123,
        "rolling90DAvgTransactionFee": 123
      },
      "options": {
        "volume": 123
      },
      "transactions": {
        "successfulTransactions": 123,
        "totalTransactions": 123,
        "unsuccessfulTransactions": 123
      }
    },
    "name": "<string>",
    "slug": "<string>"
  },
  "error": "<string>"
}