# get_tip_header example for Nervos Network (CKB)

POST get_tip_header

Returns the header with the highest block number in the canonical chain. Because of chain reorganization, the block number returned can be less than previous invocations and different invocations may return different block headers with the same block number.

Parameters

verbosity - integer

result format which allows 0 and 2. (Optional, the default is 2.)

Request

curl --location --request POST 'https://ckb.getblock.io/mainnet/' \
--header 'x-api-key: YOUR-API-KEY' \
--header 'Content-Type: application/json' \
--data-raw '{"jsonrpc": "2.0",
"method": "get_tip_header",
"params": [null],
"id": "getblock.io"}'

Response

{
    "id": "getblock.io",
    "jsonrpc": "2.0",
    "result": {
        "compact_target": "0x19129384",
        "dao": "0x95eb79d5c3f54043f727961f62d32600377eb9543dcffa0300a5e4f46a612107",
        "epoch": "0x4c302cc0016ee",
        "extra_hash": "0x0000000000000000000000000000000000000000000000000000000000000000",
        "hash": "0x67ab2bc9a47ac2b5868b17f249e4e079b7594e02b93bd687ab71779a88dee26c",
        "nonce": "0xa33e07be3012000000000005732b0c80",
        "number": "0x75aa23",
        "parent_hash": "0x31e7497acccdd8db33f7f4782c08b51b0c22e52df93d09bfd2de725cae883701",
        "proposals_hash": "0x908e87eb82b75fde5b31ddb4a2448d403bed14b1cf5b80adabc586a9ef867973",
        "timestamp": "0x18234d62d87",
        "transactions_root": "0x0c373a4db26cd0c28bdf64df103821b9ff2e91704385a71e2b05d9a4364124b1",
        "version": "0x0"
    }
}