# Helix Docs

Integrate Helix voice authentication: quickstart, SDK reference, and security guidance.

- [Overview](https://docs.helix.id/index.md): Server-side setup, callback verification, and SDK reference for @helix-id/node — everything your engineers need to go live.
- [Installation](https://docs.helix.id/installation.md): The prerequisites, the package, and the two environment variables every integration needs.
- [Quickstart](https://docs.helix.id/quickstart.md): Signed redirects, verified callbacks, Enrollment IDs, and Reference List management using the server SDK.
- [Prompt mode](https://docs.helix.id/prompt-mode.md): An alternative to wiring the Quickstart by hand. Paste one prompt into a coding agent and it builds the same redirect flow in one shot.
- [Browser SDK](https://docs.helix.id/browser-sdk.md): Optional — the Quickstart is complete on its own. This widget wires the same flow to a button and holds no secret; HMAC verification stays on your server.
- [API reference](https://docs.helix.id/api.md): Server SDK functions and the Reference List endpoint, with options, results, HTTP statuses and errors.
- [Status codes](https://docs.helix.id/status-codes.md): The seven verdicts a callback can carry, and what each one means for your user.
- [Error handling](https://docs.helix.id/errors.md): The errors the SDK throws while verifying, and the HTTP response each one deserves.
- [Testing & credentials](https://docs.helix.id/testing.md): Built-in sandbox credentials for local development, importable from the SDK itself.
- [Security](https://docs.helix.id/security.md): The rules that keep the shared secret, the nonce and the signed URL doing their job.