Below is the API for the OCaml standard library. It's directly copied over from the OCaml Manual, formatted to the Reason syntax and styled accordingly. The API docs are work-in-progress; we'll be polishing these gradually!
If you're targeting JavaScript, the API docs for BuckleScript includes all of below, plus JS-specific APIs.
sig type t = Printexc.backtrace_slot val is_raise : Printexc.Slot.t -> bool val location : Printexc.Slot.t -> Printexc.location option val format : int -> Printexc.Slot.t -> string option end