wixzel_voice 0.4.0

Official Dart SDK for the Wixzel Voice API. Build AI agents that place and answer real phone calls over your own SIP trunk, from Dart and Flutter.

0.4.0 - 2026-09-29

Renamed from wixzel_phone to wixzel_voice, because the product is called Wixzel Voice again. The API surface is unchanged.

• Depend on wixzel_voice and import package:wixzel_voice/wixzel_voice.dart.
• The client class is WixzelVoice. The old name, WixzelPhone, is kept as a deprecated typedef of the same class, so existing code only has to change its import.
• The default base URL (defaultBaseUrl) is now https://api.voice.wixzel.com. https://api.phone.wixzel.com keeps serving, so wixzel_phone 0.3.0 and earlier keep working without a change.
• Requests send User-Agent: wixzel-voice/0.4.0 and X-Wixzel-Client: wixzel-voice-dart/0.4.0, and error messages the SDK raises itself begin wixzel_voice:.

0.3.0

Realtime: talk to an agent from a Flutter or Dart app, with no SIP trunk.

• client.realtime.createSession() with CreateRealtimeSession and RealtimeSession — server-side. Mints a one-minute, single-use client secret for wss /v1/realtime.
• RealtimeConnection — the protocol client, over web_socket_channel: sendAudio, a typed events stream (RealtimeStarted, RealtimeAudio, RealtimeAudioClear, RealtimeTranscript, RealtimeWarning, RealtimeError, RealtimeEnded), end() and the close code. Microphone and speaker stay with the app; pcm16ToMulaw and mulawToPcm16 convert.
• Call.channel (phone or web).
• New dependency: web_socket_channel.

0.2.0

Eight operations the published 0.1.0 did not have, which is the whole reason for a minor rather than a patch: 0.1.0 claimed to cover every /v1 operation and, as the API grew, stopped doing so.

• client.webhooks — retrieve, update, rotateSecret, test and deliveries, with WebhookEvent, Webhook, UpdateWebhook, WebhookSecret and WebhookDelivery. A singleton, so there is no list.
• client.engines.languages() and client.engines.voices().
• client.agents.testCall().

0.1.0

First release. Every /v1 operation as a typed method, cursor pagination with autoPaging(), automatic idempotency keys on the money paths, retries on rate limits and transient failures, and a WixzelException carrying the API's code, requestId and docUrl.