cartesia-line 0.2.0.dev2

Cartesia Voice Agents SDK

Cartesia Line SDK

Build intelligent, low-latency voice agents with background reasoning.

With Line you can,

• Create your first voice agent from scratch, deploy, and talk to it in under 5 minutes.
• Turn any existing chatbot or text agent you've already built into a low-latency voice agent.
• Spin up common use cases for support or scheduling from ready-made templates.
• Deploy production-ready systems with auto-scaling, telephony integration, metrics, and call analytics.

Why Line?

• 🔗 Event-driven design to easily define multi-agent architectures with powerful background reasoning.
• ⚡ State-of-the-art voice models using Sonic TTS and Ink STT deliver the lowest latency voice experience.
• 📋 Pre-built templates for common use cases like customer support, sales agents, form filling, and more.
• 🔌 Easy integrations with tools, MCPs, and other frameworks out of the box.
• 🤝 Support for handoffs between agents and humans.
• 🧠 Reasoning agnostic works with any LLM, text agent, or chatbot code.
• 🚀 Instant deployment so you can build, deploy, and start talking in minutes with no infrastructure setup.

Quickstart (< 5 minutes)

The Line SDK is designed to be used with the Cartesia's voice agent platform Line.

• Create a Cartesia account.
• Follow the quickstart guide.

And you'll be able to make your first voice call in a few minutes.

Install the SDK

pip install cartesia-line

Common Use Cases

Use Case	Example
Basic chat	examples/basic_chat/
Form filling	examples/form-filling/
Background reasoning	examples/sales_with_leads/
Support	examples/personal_banking_handoffs/

Going Deeper

• More examples: examples/ - See all available examples and patterns

• 3rd party integrations: example_integrations/ - See example integrations for external services

  [!NOTE] While Cartesia approves each example, they are implemented and maintained by our partners.

• Full API reference: docs.cartesia.ai/line

• Get help: Discord community