intelli-verse-x Fonoster — AI voice calls
What it is
Fonoster (https://fonoster.intelli-verse-x.ai) is the self-hosted VoIP
stack: outbound calls (including AI-agent-driven calls via Autopilot),
inbound IVRs, numbers, trunks, and recordings.
- Tile id:
fonoster(group "Talk to people") - MCP endpoint:
https://fonoster-mcp.intelli-verse-x.ai/ - Auth:
Authorization: Bearer <accessKeyId:apiKey:apiSecret>— the three values colon-joined, from Workspace → API Keys. Gateway default is wired —admin_call_mcp { tileId: "fonoster" }needs no token.
There is also a deeper local skill pair (fonoster-voice,
fonoster-ops) for SDK-level call placement and cluster ops — prefer
those if they're installed and the task is complex.
Key tools
The registry doesn't enumerate tools — discover them:
admin_call_mcp { tileId: "fonoster", method: "tools/list" }
Expect application/number/trunk listing and call-creation tools ("List our Fonoster voice applications" is the canonical smoke test).
Worked example — "call +1555… with the sales agent and tell me how it went"
tools/list→ find the application-list and call-create tools.- List applications → pick the requested voice agent, note its ref.
- Stop and confirm: destination number, caller id, and which app will speak — an outbound call to a real phone is a write action.
- Create the call
{ from: <our number>, to: <destination>, appRef: ... }. - Poll/fetch the call status tool until terminal (answered / no-answer / busy / failed); report duration and, if available, the recording ref.
Common failure modes
- 401 Unauthorized — malformed Bearer: it must be all three parts
accessKeyId:apiKey:apiSecret, not the apiKey alone. Or use the gateway. - Call created but never rings — trunk/number misconfig or SIP routing;
that's ops territory (
fonoster-opsskill / the aicart cluster), not a retry-until-it-works situation. Don't re-dial more than once. - App not found — voice applications are workspace-scoped; list apps first and use the exact ref instead of guessing names.
- Long silences on the call — Autopilot LLM latency; check the app's configured model before blaming the trunk.
Cautions
Outbound calls ring real phones and cost money — always confirm the number and agent before dialing, never call lists of people without explicit approval, and never paste the API key triplet into chat.