The aim of the RInChI project, in the same vein as InChI, is to create a unique data string to describe a reaction. Reaction InChIs, or RInChIs, are such data strings. They use the InChI software and from an rxn input file a RInChI can be created. The tools for doing this are below, and some helpful information is given in the help pages.
Please note that the RInChI code now runs on Python 3.