---
name: submitheader
btcversion: 0.18.0
btcgroup: mining
permalink: en/doc/0.18.0/rpc/mining/submitheader/
---

submitheader "hexdata"

Decode the given hexdata as a header and submit it as a candidate chain tip if valid.
Throws when the header is invalid.

Arguments:
1. hexdata    (string, required) the hex-encoded block header data

Result:
None
Examples:
> bitcoin-cli submitheader "aabbcc"
> curl --user myusername --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "submitheader", "params": ["