A system for querying the brazilian post office tracking system.
For now, clone the repository on ~/quicklisp/local-projects/ and then load it by
(quicklisp:quickload :carteiro).
(For quicklisp, check https://www.quicklisp.org/beta/.)
(carteiro:rastreio "[tracking code]") will hopefully spit all that happened to you parcel so far.
Try cu276167862IN for instance.