Voice AI templates
and example apps
Start from working code
11 templates in Next.js, Python, Hono and Expo.
Voice chat you can interrupt
Talk to a Managed Agent in the browser. Interrupt it like a person.
Answers the phone, books the slot, logs the call.
Role plays in five languages, with corrections after every line.
One script tag. Answers from your docs, with the source on screen.
One MCP tool for Claude Code, Cursor and Codex. No push-to-talk key.
Paste a link, get a two-host episode with a transcript.
One MP3 per chapter, a voice per speaker, word timings for read-along.
A voice per character, word-by-word highlight, spoken choices.
Record a meeting. Get decisions and action items.
Two languages on one phone, spoken back as each turn ends.
Record entries on your phone. Hear a recap of your week.
Use it today, no code required
A Mac app you can install now, and a phone agent you set up in the Playground.
Join the teams making the switch to Cartesia
Questions
What is the Cartesia cookbook?
A set of open-source apps and templates built on Cartesia Sonic for text to speech, Ink for speech to text and Managed Agents for voice agents.
Do I need to pay to use the templates?
The templates are free and open source. You pay for the Cartesia API usage on your own key, and for your LLM provider in the templates that call one. New Cartesia accounts start on the free plan.
Which language model do the templates use?
Templates that call an LLM directly use the AI SDK and read the model from LLM_MODEL, written as provider/model, so you can use OpenAI, Anthropic or any model on the Vercel AI Gateway. Templates built on Managed Agents set the agent's LLM with AGENT_MODEL_ID.
Can I use these with Python?
Yes. Ebook to audiobook, Front desk and Coding voice mode are Python templates. The TypeScript templates use @cartesia/cartesia-js, and the cartesia Python package has the same calls.
Can a coding agent build these for me?
Yes. Every page has a prompt you can copy or open in Claude Code, Cursor or Codex. It points the agent at the template and its AGENTS.md, which lists the commands, the files and the rules for that template.
Get started today
Talk to an expert.
Connect with a member of our team and learn how Cartesia can help you build world-class voice experiences.
Start building.
Access our models via API and bring a voice agent into production in minutes.