Give your product a voice
Build voice agents for phone calls and apps, with one API key.
From $5 · Billed per second · Bring your own SIP trunk
gemini-live- Hi, thanks for calling. How can I help?
- Can I come in tomorrow morning?
- There’s a slot at 10:30. Shall I book it?
- Yes, please.
Works with
- ModelsGeminiDeepgramElevenLabsSarvamOpenRouter
- CarriersVonageBandwidthExotel
- ClientsClaude CodeCursor
One agent, on a phone line or in your app
Answer calls on your own number, or talk to people inside your product.
Set up your first agent in four steps
Make the agent and talk to it in your browser. Then pick where it answers.
- 1Describe your agent
- 2Pick a voice
- 3Talk to it in your browser
- 4Put it live
Put it live: a phone number
Paste your carrier keys, pick or buy a number, and call it.
// in the browser
await RealtimeSession.connect(session);Put it live: your website or app
Your server makes a session and your page talks to the agent.
$ claude mcp add --transport http \
wixzel-voice \
https://mcp.voice.wixzel.com/mcpPut it live: your coding agent
Add the MCP server in one click and ask for the agent.
Talk to an agent now
Pick an engine and start talking. It uses your microphone, lasts a minute, and nothing is recorded.
The demo speaks the languages it has an opening line written for. Your own agents can use every language and voice an engine supports: see the full list.
Google’s native-audio model, in any of two dozen languages. The quickest replies at the lowest price.
Uses your microphone · 60 seconds · nothing is recorded
Your agent can use the apps you already use
Connect an app that hosts an MCP server. The agent calls its tools while the caller is on the line.
33 apps with one-click setup, or any MCP server of your own. Tool calls are free; only the extra model tokens are metered.
Search contacts, companies and deals, for example by phone number.
Add Wixzel Voice to your AI assistant
Connect Claude, ChatGPT, Cursor or any MCP client. Every API endpoint becomes a tool.
Or call the API yourself
REST, plus SDKs for TypeScript and Dart.
What people build
Each page shows the API calls it uses and what a month of calls costs.

Offers your open slots on a call and saves each booking.
AI receptionist API for appointment booking

Calls every lead on a list and keeps each transcript.
Outbound AI calling campaigns

Answers from your knowledge base, and hands off to a person.
Inbound support line from your knowledge base

Hindi, Tamil, Telugu, Malayalam and more, on the Sarvam engine.
Hindi and Indian-language voice AI API

A voice agent in your web or Flutter app.
Voice agents in web and mobile apps (no phone line)

Claude Code, Codex or Cursor builds the agent and places calls.
MCP server that lets Claude make phone calls
One key, your own carrier, and a bill you can read
Every engine on one API key. Calls run on your carrier. Costs are itemised per second.
classic$0.0867/minsarvam$0.0623/mingemini-live$0.0491/mindeepgram-agent$0.1851/min
One key, every engine
Switch engines by changing one field. No provider accounts.
Keep your carrier
Use your numbers, or buy one on your carrier account. No markup.
- stt180 s$0.0323
- llm7.2k tok in$0.0015
- llm1.4k tok out$0.0012
- tts2.7k chars$0.1890
- platform3 min$0.0360
See what each call cost
Billed per second, with every stage itemized.
What to know first
Wixzel Voice is in alpha. This is what that means for you.
Frequently asked questions
How do I get started?
Do I need a SIP trunk?
Can I buy a phone number through Wixzel Voice?
POST /v1/phone-numbers/purchase and in the MCP server. Numbers that need regulatory approval, like Indian ones, use the approved documents already on your carrier account. Buying a numberCan I put an agent in my website or mobile app?
POST /v1/realtime/sessions and gets a one-minute, single-use client secret; your page or app opens wss://api.voice.wixzel.com/v1/realtime with it and streams audio. The TypeScript SDK has a drop-in browser client (wixzel-voice/realtime) and the Dart SDK a protocol client for Flutter. Your API key never reaches the client. Realtime: web and mobileHow are web and app sessions billed?
channel: "web" and ends with the same callCompleted webhook. There is no telephony cost, because there is no phone line. Billing and recordsDo I need accounts with Deepgram, ElevenLabs or OpenRouter?
wv_live_… key and a credit balance cover every engine, and there is nothing to bring. API keysHow am I billed?
What happens when credit runs out?
Can I retry a request safely?
Idempotency-Key. It is required on POST /v1/calls, POST /v1/agents/{id}/test-call and POST /v1/billing/topups, and a replay with the same key and body returns the original response instead of dialling twice. Keys are kept for 24 hours. POST /v1/campaigns/{id}/start takes no key, and starting a stopped campaign dials every lead on it again. IdempotencyWhich engines are available?
classic, sarvam, gemini-live, deepgram-agent. GET /v1/engines is the source of truth: an engine whose provider is degraded disappears from that list before your calls start failing. Voice enginesIs there an SDK?
What stage is the product at?
Wixzel-Version header, and an existing key keeps the behaviour it was created with until you pin a newer date. VersioningBuild your first voice agent
Add $5 of credit to start. No subscription, billed per second.



