STIR/SHAKEN are extensions from IETF for Session Initiation Protocol (SIP) to secure caller identity and combat origin number spoofing for telephony services. SecSIPIdX is an open source project implementing STIR/SHAKEN that offers Go and C libraries, a CLI tool and a HTTP RESTApi server. The presentation goes through the C API that can be used to add STIR/SHAKEN capabilities to exiting applications, exemplifying with how it was done for Kamailio SIP Server. Several use cases for the CLI tool will show how it can be used to test other STIR/SHAKEN implementations or validate related values, plugging in the mix examples with the HTTP RESTApi server that could facilitate rapid addition of STIR/SHAKEN to existing VoIP systems without needing to write code.