curl --request GET \
  --url https://api.messari.io/metrics/v2/protocols/metrics \
  --header 'X-Messari-API-Key: <api-key>'

{
  "error": null,
  "data": {
    "datasets": [
      {
        "slug": "core",
        "granularities": [
          "1d"
        ],
        "metrics": [
          {
            "name": "Timestamp",
            "slug": "time",
            "description": "Timestamp of the data point.",
            "is_timestamp": true
          },
          {
            "name": "TVL 24 Hour USD",
            "slug": "tvl24HourUsd",
            "description": "Total Value Locked in USD.",
            "is_timestamp": false
          },
          {
            "name": "Active Addresses 24 Hour",
            "slug": "activeAddresses24Hour",
            "description": "Number of unique addresses interacting with the protocol.",
            "is_timestamp": false
          },
          {
            "name": "Fees 24 Hour USD",
            "slug": "fees24HourUsd",
            "description": "Total fees generated by the protocol in USD.",
            "is_timestamp": false
          }
        ]
      }
    ]
  }
}