Developers · VoiceML

Move programmable voice workloads without rewriting call logic.

VoiceML is VoiceTel's XML-based voice runtime for teams that already use voice markup, callbacks, recordings, conferences, queues, and API-driven call flows. Preserve the interaction model you built while moving the economics, support path, and carrier layer to VoiceTel.

Start building VoiceML overview

inbound.xmlVoiceML · 200 OK

<?xml version="1.0" encoding="UTF-8"?>
<Response>
  <Gather numDigits="1" action="/route" method="POST" timeout="6">
    <Say>Press 1 for sales or 2 for support.</Say>
  </Gather>
  <Dial timeout="20">
    <Queue>support</Queue>
  </Dial>
  <Record maxLength="120" transcribe="true" action="/voicemail" />
</Response>

Call control

Answer, route, record, gather, dial, queue, conference, redirect, stream, and transcribe.

Signed webhooks help your application verify callbacks, and existing handlers can be pointed toward VoiceTel when they stay within the supported VoiceML-compatible surface.

Compatibility matrix

Signed webhooksverify every callback Signed
Existing handlerspoint them at VoiceTel Unchanged
English speech-to-textfree default from day one Included
Production STT, TTS, and storageyour preferred vendor, billed directly No markup

What developers can build

Inbound IVRs and call routing

Create phone menus, route callers by input, forward to queues, record voicemails, and send callbacks into your application.
Outbound calling workflows

Trigger calls from your product, control call behavior with markup, and connect users, agents, customers, or automated systems.
Call recording and transcription

Free defaults get you transcribing English calls on day one. Swap in your preferred STT, TTS, or recording-storage vendor when you're ready to tune for production — billed directly, no VoiceTel markup.
Queues, conferences, live call control

Build support, sales, dispatch, appointment, and contact-center workflows without starting from scratch.

Validator

Verify your markup before you ship.

Paste any VoiceML response into the validator and confirm every element is well-formed XML and matches the verb / noun schema. Pure client-side; nothing uploaded.

Open the validator