curl --request GET \
  --url https://tonapi.io/v2/blockchain/masterchain/{masterchain_seqno}/shards

{
  "shards": [
    {
      "last_known_block_id": "(0,8000000000000000,4234234)",
      "last_known_block": {
        "tx_quantity": 130,
        "value_flow": {
          "from_prev_blk": {
            "grams": 10000000000,
            "other": [
              {
                "id": 13,
                "value": "10000000000"
              }
            ]
          },
          "to_next_blk": {
            "grams": 10000000000,
            "other": [
              {
                "id": 13,
                "value": "10000000000"
              }
            ]
          },
          "imported": {
            "grams": 10000000000,
            "other": [
              {
                "id": 13,
                "value": "10000000000"
              }
            ]
          },
          "exported": {
            "grams": 10000000000,
            "other": [
              {
                "id": 13,
                "value": "10000000000"
              }
            ]
          },
          "fees_collected": {
            "grams": 10000000000,
            "other": [
              {
                "id": 13,
                "value": "10000000000"
              }
            ]
          },
          "fees_imported": {
            "grams": 10000000000,
            "other": [
              {
                "id": 13,
                "value": "10000000000"
              }
            ]
          },
          "recovered": {
            "grams": 10000000000,
            "other": [
              {
                "id": 13,
                "value": "10000000000"
              }
            ]
          },
          "created": {
            "grams": 10000000000,
            "other": [
              {
                "id": 13,
                "value": "10000000000"
              }
            ]
          },
          "minted": {
            "grams": 10000000000,
            "other": [
              {
                "id": 13,
                "value": "10000000000"
              }
            ]
          }
        },
        "workchain_id": 0,
        "shard": "8000000000000000",
        "seqno": 21734019,
        "root_hash": "131D0C65055F04E9C19D687B51BC70F952FD9CA6F02C2801D3B89964A779DF85",
        "file_hash": "A6A0BD6608672B11B79538A50B2204E748305C12AA0DED9C16CF0006CE3AF8DB",
        "global_id": -239,
        "version": 0,
        "after_merge": true,
        "before_split": true,
        "after_split": true,
        "want_split": true,
        "want_merge": true,
        "key_block": true,
        "gen_utime": 1674826775,
        "start_lt": 23814011000000,
        "end_lt": 23814011000001,
        "vert_seqno": 0,
        "gen_catchain_seqno": 0,
        "min_ref_mc_seqno": 0,
        "prev_key_block_seqno": 0,
        "prev_refs": [
          [
            "(-1",
            4234235,
            "8000000000000000)"
          ]
        ],
        "in_msg_descr_length": 0,
        "out_msg_descr_length": 0,
        "rand_seed": "131D0C65055F04E9C19D687B51BC70F952FD9CA6F02C2801D3B89964A779DF85",
        "created_by": "A6A0BD6608672B11B79538A50B2204E748305C12AA0DED9C16CF0006CE3AF8DB",
        "gen_software_version": 0,
        "gen_software_capabilities": 0,
        "master_ref": "(-1,4234234,8000000000000000)"
      }
    }
  ]
}