CallLens + Side Quest Hotline
About this project
In one sentence, what are you building?
CallLens shows which turn of a Vapi voice call broke and why (latency by stage, mishearing, dead air), judged by TypeSafe Jev in ~120 ms, and self-heals the live agent in one click. Demo agent: Side Quest Hotline (Vapi + Deepgram + Exa + Jev).
What problem are you solving?
Voice agents fail silently: a failed call has no error, the caller just hangs up. Latency is the #1 complaint in Vapi's forums and speech-to-text slips on accents, but logs only say "customer ended call". In our real test call Deepgram heard "Embarcadero" as Aero/Arrow/Amir, the transcriber took 1.5s per turn (LLM only 334ms), and 10 of 22 turns broke. Vapi Composer blamed the prompt; CallLens found the speech-layer root cause and fixed it live.