Wixzel Voice

Build AI voice agents that call real phone numbers over your own SIP trunks. No ElevenLabs key, no Deepgram key, no OpenRouter key — one Wixzel Voice key and a prepaid balance, billed per second of what a call actually consumes.

Quickstart

Four requests from nothing to a ringing phone.

API reference

Every endpoint, with a playground you can fire real requests from.

Voice engines

Compose a pipeline, or hand the whole turn to one realtime model.

Billing

How credit is reserved, spent and itemised.

What it replaces

A voice agent normally means separate contracts, keys and invoices for speech-to-text, the model, and speech synthesis — each with its own failure mode and its own bill to reconcile.

curl https://api.voice.wixzel.com/v1/calls \
  -H "Authorization: Bearer $WIXZEL_API_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{
    "to": "+14155550100",
    "agent_id": "ag_01HXYZ"
  }'

{
  "object": "call",
  "status": "queued",
  "session_id": "sip-4f2a…",
  "cost_micros": null
}

Telephony stays yours

Calls run over a SIP trunk you already have. We do not resell minutes, so your carrier rates and carrier relationship are unchanged — and there is no telephony markup on your bill.

⌘I

Getting started

Concepts

API reference

Quickstart

API reference

Voice engines

Billing

What it replaces

Telephony stays yours

Quickstart

API reference

Voice engines

Billing

​What it replaces

​Telephony stays yours

What it replaces

Telephony stays yours