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.
module Syntaxerr: sig .. endtype error = | | | Unclosed of Location.t * string * Location.t * string | 
| | | Expecting of Location.t * string | 
| | | Not_expecting of Location.t * string | 
| | | Applicative_path of Location.t | 
| | | Variable_in_scope of Location.t * string | 
| | | Other of Location.t | 
| | | Ill_formed_ast of Location.t * string | 
exception Error of error
exception Escape_error
val report_error : Format.formatter -> error -> unit
val location_of_error : error -> Location.t
val ill_formed_ast : Location.t -> string -> 'a