npm package: @soniox/vercel-ai-sdk-provider
Description: Soniox transcription provider for the Vercel AI SDK.
Author: Soniox Inc.
Latest version: 0.1.3

# Vercel AI SDK

[Vercel AI SDK](https://sdk.vercel.ai/) is a library for building AI applications. This provider integrates Soniox
transcription models with the Vercel AI SDK.

## Installation

```bash
npm install @soniox/vercel-ai-sdk-provider
```

## Authentication

Set `SONIOX_API_KEY` in your environment or pass `apiKey` when creating the provider.
Get your API key from the [Soniox Console](https://console.soniox.com).

## Example

```ts
import { soniox } from '@soniox/vercel-ai-sdk-provider';
import { experimental_transcribe as transcribe } from 'ai';

const { text } = await transcribe({
  model: soniox.transcription('stt-async-v4'),
  audio: new URL(
    'https://soniox.com/media/examples/coffee_shop.mp3',
  ),
});
```

## Provider options

Use `createSoniox` to customize the provider instance:

```ts
import { createSoniox } from '@soniox/vercel-ai-sdk-provider';

const soniox = createSoniox({
  apiKey: process.env.SONIOX_API_KEY,
  apiBaseUrl: 'https://api.soniox.com',
});
```

Options:
- `apiKey`: override `SONIOX_API_KEY`.
- `apiBaseUrl`: custom API base URL. See list of regional API endpoints [here](https://soniox.com/docs/stt/data-residency#regional-endpoints).
- `headers`: additional request headers.
- `fetch`: custom fetch implementation.
- `pollingIntervalMs`: transcription polling interval in milliseconds. Default is 1000ms.

## Transcription options

Per-request options are passed via `providerOptions`:

```ts
const { text } = await transcribe({
  model: soniox.transcription('stt-async-v4'),
  audio,
  providerOptions: {
    soniox: {
      languageHints: ['en', 'es'],
      enableLanguageIdentification: true,
      enableSpeakerDiarization: true,
      context: {
        terms: ["Soniox", "Vercel"]
      },
    },
  },
});
```

Available options:
- `languageHints`
- `languageHintsStrict`
- `enableLanguageIdentification`
- `enableSpeakerDiarization`
- `context`
- `clientReferenceId`
- `webhookUrl`
- `webhookAuthHeaderName`
- `webhookAuthHeaderValue`
- `translation`

Check the [Soniox API reference](https://soniox.com/docs/stt/api-reference/transcriptions/create_transcription) for more details.

## Language hints

Soniox automatically detects and transcribes speech in [**60+ languages**](https://soniox.com/docs/stt/concepts/supported-languages). When you know which languages are likely to appear in your audio, provide `languageHints` to improve accuracy by biasing recognition toward those languages.

Language hints **do not restrict** recognition — they only **bias** the model toward the specified languages, while still allowing other languages to be detected if present.

```ts
const { text } = await transcribe({
  model: soniox.transcription('stt-async-v4'),
  audio,
  providerOptions: {
    soniox: {
      languageHints: ['en', 'es'], // ISO language codes
    },
  },
});
```

For more details, see the [Soniox language hints documentation](https://soniox.com/docs/stt/concepts/language-hints).

## Context

Provide custom context to improve transcription and translation accuracy. Context helps the model understand your domain, recognize important terms, and apply custom vocabulary.

The `context` object supports four optional sections:

```ts
const { text } = await transcribe({
  model: soniox.transcription('stt-async-v4'),
  audio,
  providerOptions: {
    soniox: {
      context: {
        // Structured key-value information (domain, topic, intent, etc.)
        general: [
          { key: 'domain', value: 'Healthcare' },
          { key: 'topic', value: 'Diabetes management consultation' },
          { key: 'doctor', value: 'Dr. Martha Smith' },
        ],
        // Longer free-form background text or related documents
        text: 'The patient has a history of...',
        // Domain-specific or uncommon words
        terms: ['Celebrex', 'Zyrtec', 'Xanax'],
        // Custom translations for ambiguous terms
        translationTerms: [
          { source: 'Mr. Smith', target: 'Sr. Smith' },
          { source: 'MRI', target: 'RM' },
        ],
      },
    },
  },
});
```

For more details, see the [Soniox context documentation](https://soniox.com/docs/stt/concepts/context).

## Documentation

- Soniox API docs: https://soniox.com/docs
- AI SDK docs: https://ai-sdk.dev/docs