Moodle Plugins directory: REST protocol (with JSON/XML payload support): Versions | Moodle.org
REST protocol (with JSON/XML payload support)
Web service protocols ::: webservice_restjson
Maintained by 
Owen Barritt
Owen BarrittREST webservice protocol based on the standard core REST webservice, but with added support for JSON & XML payloads
and supports using HTTP ACCEPTS headers for determining response format.
Current version
0.4 for Moodle 2.9+ (2016021900)
Moodle 2.9Released: tallimanngorneq den 19. februaarip 2016, 18:26