> For the complete documentation index, see [llms.txt](https://resources.atriptech.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://resources.atriptech.com/help-center/popular-topics/post-booking/ancillary.md).

# Ancillary

- [Atlas Ancillary Services Scope](https://resources.atriptech.com/help-center/popular-topics/post-booking/ancillary/atlas-ancillary-services-scope.md)
- [Post-Booking Baggage via ATRIP](https://resources.atriptech.com/help-center/popular-topics/post-booking/ancillary/post-booking-baggage-via-atrip.md)
- [Post Booking Baggage via API](https://resources.atriptech.com/help-center/popular-topics/post-booking/ancillary/post-booking-baggage-via-api.md)