The SecSIPIDx project released v1.3.1. It offers Go and C API libraries as well as a CLI tool (with the option to run as a REST API server) to facilitate the implementation of STIR/SHAKEN extensions in SIP applications. See more about at:

The release page offers downloads of binaries for Linux, MacOS and Windows:

Kamailio’s secsipid module, which offers STIR/SHAKEN (RFC8224, RFC 8588) capabilities starting from v5.4.0, is leveraging the library from that project.

Thanks for flying Kamailio!