This website previously hosted a reference implementation for the International Patient Summary (IPS) using the open-source HAPI FHIR server
HL7 now hosts a reference server available at hl7-ips-server.hl7.org/fhir
Since HAPI 7.2 IPS has been integrated into the standard HAPI release. So you can also use the $summary operation at https://hapi.fhir.org/
There is currently work underway for the 2.0 release of the standard. The current build of the standard is available at: build.fhir.org/ig/HL7/fhir-ips/
Check out the following files for more information on the original 2022 project to develop Reference Implementation Server for the IPS: