> For the complete documentation index, see [llms.txt](https://docs.titanrelay.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.titanrelay.xyz/proposers/get-header.md).

# Get Header

We support the following http headers for `get_header` calls:

* `X-MEVBoost-StartTimeUnixMS` / `Date-Milliseconds` : optional, should be set to the local unix timestamp in milliseconds just before the `get_header` call is started
* `x-timeout-ms` : optional, should be set to the timeout in millisecond that the client has set for the call