Cartesia (Line)
Real-time voice-AI platform (Sonic TTS / Ink STT) whose 'Line' product is a full voice-…
Real-time voice-AI platform (Sonic TTS / Ink STT) whose 'Line' product is a full voice-agent dev platform with CLI, local dev, GitHub integration and one-command deploy. $64M Series A led by Kleiner Perkins; SOC-2/HIPAA; sub-90ms latency; Line launched as a dedicated voice-agent build platform with CLI + GitHub integration, maki
Beta
Status
SDK / Library
Pattern
Python
Runtime
Not yet published
SDK version
Readiness
What “Beta” means for Cartesia (Line)
The integration path is built and tested. Real customers can attach now, but expect minor breaking changes until the 1.0 contract freeze.
How it attaches
SDK / Library.
Install the trustvice-actor-cartesia package and call witness.attach() once during agent initialisation.
Install the Trustvice adapter package from npm, PyPI, or cargo and call witness.attach(agent) in your application.
pip install trustvice-actor-cartesia
- 1
Install the adapter
Add trustvice-actor-cartesia to your project from PyPI.
- 2
Issue a workspace API key
Generate a twk_-prefixed key in the dashboard under Settings → API Keys, scoped to the workspace and environment this agent's data should land in.
- 3
Attach the witness
Call witness.attach(agent) once when you initialise your Cartesia (Line) agent. The adapter registers the framework callbacks, handles retries, and performs the workspace handshake.
- 4
Verify
Trigger one agent run. The dashboard's Witness page shows the canonical record within ~1 second of the agent emitting it.
pip install trustvice-actor-cartesia
Coverage
3 event types captured.
agent.invocationEvery top-level agent run — the input, the resolved output, timing, and token usage.
tool.callEach tool / function the agent invokes, with arguments and the returned result.
channel.messageMessages sent and received over the agent's channels (Telegram, Slack, Discord, …).
The full pattern guide
SDK / Library — end to end.
Every framework on this pattern shares the same platform-side spine, endpoints, and gotchas. The pattern guide covers them in full.
Read the SDK / Library guideNeed help landing Cartesia (Line)?
Talk to the integration team.
We help you land the integration end to end — including the parts that live in your environment.
Request integration help
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