Outbound lead qualification

Outbound AI calling API for lead qualification

Calling a long list of leads by hand takes days, and most calls end in voicemail or a quick no. For sales teams with a list and a script: leads go in by bulk upload, a campaign dials them over your own trunk, the agent asks the qualifying questions, and every call is a record with its status and transcript, linked to the lead by lead_id. Prepaid, per second. Today a campaign does not queue behind the concurrent-call limit, so large lists run in batches sized to it.

Last updated 21 October 2026

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An outbound calling campaign working through a list of leads, one call record per lead

How do you build an outbound lead-qualification agent with Wixzel Voice?

01
POST /v1/leads/bulk
Upload the list with the fields the script needs.
02
POST /v1/agents
Create the caller: the script, the qualifying questions, and the voice.
03
POST /v1/campaigns
Attach the agent and the leads, then start it, or pause it to stop the batch and hang up calls in flight.
04
Concurrency
A campaign places its calls in quick succession and does not queue them: each counts toward the account's concurrent-call limit, 5 by default, and a lead beyond it is recorded as a failed call. Run lists in batches no larger than the limit, or ask to raise it.
05
GET /v1/calls
Every call with its status and transcript, filterable by campaign, and deletable when the data is no longer needed.

Which voice engine fits outbound lead qualification?

Use the classic engine on Wixzel Voice, at $0.0865 per connected minute. Short, scripted outbound calls are the cheapest workload; the classic engine keeps the per-minute cost lowest for English. Use sarvam for Indian-language lists.

What does outbound lead qualification cost on Wixzel Voice?

Wixzel Voice engine time for 2-minute calls on the classic engine, at typical speech rates, billed per second of actual usage. Telephony is your own trunk at your carrier’s rate and is not included, and shorter calls cost proportionally less.

Calls per month	Connected minutes	Engine cost per month
1,000	2,000	$173
5,000	10,000	$865
20,000	40,000	$3,460

Prepaid: add credit from $5 and the calls spend it. Estimate your own mix.

Which guides show how to build an outbound lead-qualification agent on Wixzel Voice?

Run an AI lead-qualification campaign with Wixzel Voice

Upload leads, run campaigns with an agent you wrote over your own SIP trunk, and read every call's status and transcript, with the Wixzel Voice API in Node.js.

AI phone call API

Four requests to a ringing phone, what a call record returns, and what a call costs.

Bring your own SIP trunk

Twilio, Telnyx, Plivo, Vonage, Bandwidth, Exotel, Vobiz, Mobily or any SIP provider: what to set at the carrier.

Frequently asked questions

Can Wixzel Voice run outbound calling campaigns?

Yes. Leads are uploaded in bulk, a campaign is created with an agent and a lead set, and starting it dials every lead in quick succession over your SIP trunk. Today a campaign does not queue behind the account's concurrent-call limit, five by default: a lead beyond it is recorded as a failed call, so run large lists in batches sized to the limit. Pausing a campaign stops it and hangs up its calls in flight; starting a stopped campaign again dials every lead on it again, so continue with a new campaign made of the leads not yet reached.

Is an outbound campaign compliant with calling regulations?

That is your responsibility as the caller. The Acceptable Use Policy requires consent where the law requires it, honouring do-not-call rules, and disclosing that the caller is automated where required. Wixzel Voice provides the tooling, not the legal basis.

How many calls can run at once?

Five per account by default. The cap is raised on request; email the address on the contact page with the volume you expect.

What does a campaign of 5,000 two-minute calls cost?

About 865 dollars on the classic engine for the connected minutes, plus your carrier's rate for the trunk. Unanswered calls are not charged for engine time because the engine never starts.

What else do agencies and developers build on Wixzel Voice?

Appointment booking

Build an agent that answers the phone, checks availability and books an appointment, over your own SIP trunk, with the booking written back through the API.

Inbound support line

Answer a support number with an agent that reads from a knowledge base you upload, handles the common questions, and leaves a transcript of every call.

Indian languages

Run phone agents in Indian languages on models built for them, with the sarvam engine covering speech-to-text, the language model and text-to-speech end to end.

Web and mobile apps

Put an agent in a browser page, a Flutter app or a kiosk with no SIP trunk and no phone number: your server mints a one-minute session, the app streams audio over a WebSocket, and the session is billed like a call.

Website voice assistant

Put a talking AI assistant on your website with one script tag: an agent made from your site, with an animated mascot visitors call from the browser, caller details, who-can-call settings and daily caps.

Phone calls from AI agents

Connect Claude Code, Codex, Cursor or any MCP client to your account, and let an AI agent connect a carrier, build a voice agent, place calls, run campaigns and read transcripts, with every tool that spends money asking first.

Low-cost AI calling

Run AI phone calls for a few cents a minute: per-second billing from prepaid credit, no subscription or minimum, your own SIP trunk with no telephony markup, and every charge itemised.

Talking AI avatar

Give a voice agent a face: an animated avatar that lip-syncs to the agent, for a website, a share link, a web app or a Flutter app, with no fee for the avatar.

For agencies

Build a phone agent for each client on their own account and carrier, in their language, and charge a retainer on a cost billed per second.

All Wixzel Voice facts

Operator, prices, limits, refunds and data location, on one page.

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