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Wixzel Voice guides: build AI phone agents step by step

Six builds, each from an empty account to a working agent: the code, what it costs at the published prices, and the limits worth knowing before you start.

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Wixzel Voice is a voice AI API for building AI agents that place and answer real phone calls over your own SIP trunk, or talk to people in your web and mobile apps. One API key and one prepaid balance cover every voice engine, billed per second of actual usage.

Every request, field, tool name and model id in these guides is taken from the API reference and the official SDKs, and every price is computed from the price book the meter bills against. They are written by Aqeel Shamsudheen, who builds and runs Wixzel Voice.

  1. 01

    Give Claude a real phone line with the Wixzel Voice MCP server

    You end with: Claude, in Claude Code or claude.ai, placing a real call over your SIP trunk and reading back the transcript, with a confirmation before anything dials.

    About 15 minutes · classic engine, $0.0867 per minute

  2. 02

    Build a Twilio AI receptionist in Node.js with Wixzel Voice

    You end with: Your existing Twilio number answered by an AI receptionist that books appointments into the API, built in Node.js.

    About 30 minutes · classic engine, $0.0867 per minute

  3. 03

    A Hindi and Malayalam phone agent on Wixzel Voice's sarvam engine

    You end with: Two phone agents, one speaking Hindi and one Malayalam, on Sarvam's Indian-language models, answering or placing calls over your SIP trunk.

    About 20 minutes once a trunk is connected · sarvam engine, $0.0623 per minute

  4. 04

    Add a Flutter voice agent over WebSocket with Wixzel Voice

    You end with: A Flutter app where users talk to your voice agent over a WebSocket, with the API key kept on your server and no phone number involved.

    About an hour · gemini-live engine, $0.0466 per minute

  5. 05

    Gemini Live on a real phone call with the Wixzel Voice API

    You end with: A Gemini Live agent ringing a real phone over your SIP trunk from four cURL requests, and the call record with its transcript and cost.

    About 10 minutes with your carrier set up · gemini-live engine, $0.0466 per minute

  6. 06

    Run an AI lead-qualification campaign with Wixzel Voice

    You end with: A list of leads called by your agent over your SIP trunk, in batches sized to your concurrency limit, with every call's status and transcript read back.

    About 30 minutes, plus the calls · classic engine, $0.0867 per minute

Plan the budget and the pilot

Calculate call costs, choose an architecture and evaluate outcomes before increasing traffic.