curl --request GET \
  --url https://toncenter.com/api/v3/blocks

{
  "blocks": [
    {
      "after_merge": true,
      "after_split": true,
      "before_split": true,
      "created_by": "<string>",
      "end_lt": "0",
      "file_hash": "<string>",
      "flags": 123,
      "gen_catchain_seqno": 123,
      "gen_utime": "0",
      "global_id": 123,
      "key_block": true,
      "master_ref_seqno": 123,
      "masterchain_block_ref": {
        "seqno": 123,
        "shard": "0",
        "workchain": 123
      },
      "min_ref_mc_seqno": 123,
      "prev_blocks": [
        {
          "seqno": 123,
          "shard": "0",
          "workchain": 123
        }
      ],
      "prev_key_block_seqno": 123,
      "rand_seed": "<string>",
      "root_hash": "<string>",
      "seqno": 123,
      "shard": "0",
      "start_lt": "0",
      "tx_count": 123,
      "validator_list_hash_short": 123,
      "version": 123,
      "vert_seqno": 123,
      "vert_seqno_incr": true,
      "want_merge": true,
      "want_split": true,
      "workchain": 123
    }
  ]
}

{
  "code": 123,
  "error": "<string>"
}