> For the complete documentation index, see [llms.txt](https://docs.halosecurity.com/api/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.halosecurity.com/api/appendix.md).

# Filter Reference

Reference for the filter syntax used by the API, including target filters, date matching, and IP range formats.