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 Ast_helper: sig .. endtype lid = Longident.t Asttypes.loc 
type str = string Asttypes.loc 
type loc = Location.t 
type attrs = Parsetree.attribute list 
val default_loc : loc Pervasives.ref
val with_default_loc : loc -> (unit -> 'a) -> 'a
default_loc within the scope of the execution
        of the provided function.module Typ: sig .. endmodule Pat: sig .. endmodule Exp: sig .. endmodule Val: sig .. endmodule Type: sig .. endmodule Te: sig .. endmodule Mty: sig .. endmodule Mod: sig .. endmodule Sig: sig .. endmodule Str: sig .. endmodule Md: sig .. endmodule Mtd: sig .. endmodule Mb: sig .. endmodule Opn: sig .. end
module Incl: sig .. endmodule Vb: sig .. endmodule Cty: sig .. endmodule Ctf: sig .. endmodule Cl: sig .. endmodule Cf: sig .. endmodule Ci: sig .. endmodule Csig: sig .. endmodule Cstr: sig .. end