> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://dev.hume.ai/expression-measurement/docs/quickstart/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://dev.hume.ai/_mcp/server.

# Get started

## Docs

- [Expression Measurement API](https://dev.hume.ai/expression-measurement/docs/overview.md): Measure emotional expression in voices and faces, from uploaded audio and images or live audio and video streams.
- [Authentication](https://dev.hume.ai/expression-measurement/docs/authentication.md): Authenticate requests with an API key or an access token.
- [Python quickstart](https://dev.hume.ai/expression-measurement/docs/quickstart/python.md): Install the Python SDK, upload audio and an image, and stream audio and video to the realtime endpoints.
- [Node.js quickstart](https://dev.hume.ai/expression-measurement/docs/quickstart/nodejs.md): Install the Node.js SDK, upload audio and an image, and stream audio and video to the realtime endpoints.