The challenge
Scripted NPC dialogue felt flat and repetitive, and writing branching lines for every interaction was endless.
Real-time voice interaction was the dream but felt unreachable.
The solution
The team embedded voice into their own app via the MyChatBot Web Voice SDK:
- Voice inside the app, the MyChatBot Web Voice SDK adds inbound (WebRTC) and outbound (Twilio/SIP) calls with a few lines of JS.
- Own voice and instructions, each AI voice agent gets its own voice, language and prompt, fully under the team's control.
- Client-side tools, the agent calls the app's own functions mid-call, navigating the UI, searching, booking, updating records.
- Persistent callers, defaultCallerId keeps a stable identity across sessions, so context follows the user.
- Scales with usage, minute bundles and per-minute overage mean the same SDK serves a prototype and a production app.
A voice-driven NPC prototype shipped in a week and average session length rose 33%.
What was deployed
Agents used
Voice Agent (SDK)Client Tools
Channels connected
Web Voice SDKWebRTCTwilio/SIP
"Players talk to characters and the characters talk back, live."
Maksym Dorosh
Game Director
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