API Version Description Updated
Changes 1.0 RPI & RPIX changes since 1949 26/06/2019 XML JSON Embeddable HTML HTML
RPI Group Changes 1.0 RPI group changes since Q4 2004 26/06/2019 XML JSON Embeddable HTML HTML
RPIX Group Changes 1.0 RPIX group changes since Q4 2014 26/06/2019 XML JSON Embeddable HTML HTML

Source: http://www.gov.gg/rpi