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Hi <@1233640756548206643> <@1217074286553206885> 
I've set up between Genesys Cloud and VAPI using a SIP trunk.
In our Genesys call flow, I am setting UUI (User-to-User Information) data before transferring the call to VAPI. I’ve confirmed that this data is being correctly transmitted in the SIP INVITE, specifically in the User-to-User header. For example: `User-to-User: 00736168696c2e647574746120736168696c2e647574746140616363656c6e6f6d6963732e636f6d202b3931373439383932353130372065336639336432362d643231322d346361382d626538392d386633306666376635373864;encoding=hex;purpose=isdn-uui`

However, I’m unable to find this UUI data anywhere in the webhook payload VAPI sends to our assistant-selector endpoint to the server url configured. I've inspected the assistantOverrides.variableValues, call object, and other parts of the payload, but the User-to-User header does not appear to be exposed.

Could you please help me with this - my goal is to  capture this uui data in my server which are needed to make the assistant config . I am sharing the req body i get for the server url i configured
https://cdn.discordapp.com/attachments/1386972708029599764/1386972708612472952/message.txt?ex=68852dbe&is=6883dc3e&hm=5d9940203caa5c2a0fded88e68349000c230f1e622c2e84e57c84ef2d48d1ed0&

hello <@1233640756548206643> <@865531204849500190> <@1006897684965244938> @sahilsuman
could someone pls help me out here ?

hey team its around one day since i raised the request, can i expect some response on this pls?

sry but i am really in bit of urgency here

Hey Sahil! You are sending the SIP headers correctly. It's just that we expect 'X' to be prepended before each header, and if not, we drop it. Or it doesn't consider it. So just prepend 'X' before your SIP header, and it will be visible in your payload.   
  
`example`  
X-User-to-User
https://cdn.discordapp.com/attachments/1386972708029599764/1387342157953896500/Screenshot_2025-06-25_at_1.32.07_PM.png?ex=685cfe92&is=685bad12&hm=482f86ac5bea62e1699acd40178a8b5bc9c329f45d2072d92c0bdae016f76238&

Hey Sahil, let me know how it goes for you.

Hi <@865531204849500190> 
apologies for the late reply, yes i am now able to receive the details in the payload
Thanks for your assistance.