Can a Wixzel Phone agent answer questions from my own documents?

Yes. A knowledge base is uploaded through the API and attached to the agent, which answers from it during the call.

Can callers interrupt the agent?

Yes. interrupt_sensitivity on the agent governs how readily it stops talking when the caller speaks. Short acknowledgements like "yes" never interrupt at any setting; they are queued and answered when the agent finishes.

What if the agent does not know the answer?

Give it an escalation rule in the prompt: take a message, promise a callback, or end the call with an outcome your system routes to a person. The transcript shows you which questions to add to the knowledge base.

What does a four-minute support call cost?

About 0.186 dollars on the gemini-live engine, or 0.347 on classic, plus your carrier's rate.

Inbound support line

An AI voice agent for an inbound support line, grounded in your knowledge base

For product and service teams with a support number and a set of answers that repeat: upload the answers as a knowledge base, attach it to an agent, and route the number to it. The agent answers from what you gave it, every call is transcribed, and you pay per second of talk time from a prepaid balance.

Last updated 8 September 2026

Create an account Quickstart

How it is built

01
POST /v1/knowledge-bases
Upload the documents or answers the agent may draw on.
02
POST /v1/agents
Create the agent with the knowledge base attached, a tone, and the escalation rule.
03
POST /v1/sip-trunks
Route the support number's trunk to the platform for inbound calls.
04
Turn taking
Tune interrupt_sensitivity and silence_wait_ms so callers can cut in without the agent talking over them.
05
GET /v1/calls
Review transcripts, find the questions the knowledge base did not cover, and improve it.

The engine to use

gemini-live, $0.0466 per connected minute. Support calls are conversational and interruption-heavy; a realtime engine keeps the turn latency lowest. The classic engine is the cheaper choice if cost matters more than snappiness.

What it costs

Engine time for 4-minute calls on the gemini-live engine, at typical speech rates. Telephony is your own trunk at your carrier’s rate and is not included; the meter charges per second, so shorter calls cost proportionally less.

Calls per month	Connected minutes	Engine cost per month
300	1,200	$55.92
1,500	6,000	$280
6,000	24,000	$1,118

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

Frequently asked questions

Can a Wixzel Phone agent answer questions from my own documents?: Yes. A knowledge base is uploaded through the API and attached to the agent, which answers from it during the call.
Can callers interrupt the agent?: Yes. interrupt_sensitivity on the agent governs how readily it stops talking when the caller speaks. Short acknowledgements like "yes" never interrupt at any setting; they are queued and answered when the agent finishes.
What if the agent does not know the answer?: Give it an escalation rule in the prompt: take a message, promise a callback, or end the call with an outcome your system routes to a person. The transcript shows you which questions to add to the knowledge base.
What does a four-minute support call cost?: About 0.186 dollars on the gemini-live engine, or 0.347 on classic, plus your carrier's rate.

Other uses

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.

Outbound lead qualification

Upload leads, start a campaign, and have an agent call each one over your own SIP trunk, ask your qualifying questions, and record the outcome per lead.

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.

All Wixzel Phone facts

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