curl --location 'https://api.inworld.ai/tts/v1/voice:synthesizeBatch' \
--header "Authorization: Basic $INWORLD_API_KEY" \
--header 'Content-Type: application/json' \
--data '{
  "items": [
    {
      "customId": "chapter-01",
      "request": {
        "text": "The first chapter begins on a quiet morning.",
        "voiceId": "Ashley",
        "modelId": "inworld-tts-2",
        "audioConfig": { "audioEncoding": "MP3" },
        "timestampType": "WORD"
      }
    },
    {
      "customId": "chapter-02",
      "request": {
        "text": "The second chapter opens with a storm at sea.",
        "voiceId": "Dennis",
        "modelId": "inworld-tts-2",
        "audioConfig": { "audioEncoding": "MP3" }
      }
    }
  ]
}'

import requests

url = "https://api.inworld.ai/tts/v1/voice:synthesizeBatch"
headers = {"Authorization": "Basic <api-key>", "Content-Type": "application/json"}


def item(custom_id, text, voice_id):
    return {
        "customId": custom_id,
        "request": {
            "text": text,
            "voiceId": voice_id,
            "modelId": "inworld-tts-2",
            "audioConfig": {"audioEncoding": "MP3"},
        },
    }


payload = {"items": [
    item("chapter-01", "The first chapter begins on a quiet morning.", "Ashley"),
    item("chapter-02", "The second chapter opens with a storm at sea.", "Dennis"),
]}

operation = requests.post(url, json=payload, headers=headers).json()
print(operation["name"])  # poll this via GET /lro/v1alpha/{name}

const url = 'https://api.inworld.ai/tts/v1/voice:synthesizeBatch';

const item = (customId, text, voiceId) => ({
  customId,
  request: {
    text,
    voiceId,
    modelId: 'inworld-tts-2',
    audioConfig: { audioEncoding: 'MP3' },
  },
});

const response = await fetch(url, {
  method: 'POST',
  headers: {
    'Authorization': 'Basic <api-key>',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    items: [
      item('chapter-01', 'The first chapter begins on a quiet morning.', 'Ashley'),
      item('chapter-02', 'The second chapter opens with a storm at sea.', 'Dennis'),
    ],
  }),
});

const operation = await response.json();
console.log(operation.name); // poll this via GET /lro/v1alpha/{name}

{
  "name": "workspaces/{workspace}/ttsBatchJobs/9e03dcb0-2ad5-483b-9e61-962f3a9bb430/operations/1786040024834-Wpj18s",
  "metadata": null,
  "done": false
}

{
  "code": 5,
  "message": "Unknown voice: John not found!",
  "details": []
}