curl --location 'https://api.inworld.ai/voices/v1/voices:design' \
--header "Authorization: Basic $INWORLD_API_KEY" \
--header 'Content-Type: application/json' \
--data '{
  "languageCode": "en-US",
  "designPrompt": "Warm, friendly, conversational voice with a subtle smile; natural pacing; clear articulation.",
  "previewText": "Hey! I am here. What can I help you with today?",
  "voiceDesignConfig": {
    "numberOfSamples": 1
  }
}'

import requests

url = "https://api.inworld.ai/voices/v1/voices:design"
headers = {
    "Authorization": "Basic <api-key>",
    "Content-Type": "application/json"
}
payload = {
    "languageCode": "en-US",
    "designPrompt": "Warm, friendly, conversational voice with a subtle smile; natural pacing; clear articulation.",
    "previewText": "Hey! I am here. What can I help you with today?",
    "voiceDesignConfig": {
        "numberOfSamples": 1
    }
}

response = requests.post(url, json=payload, headers=headers)
print(response.json())

const url = 'https://api.inworld.ai/voices/v1/voices:design';

const response = await fetch(url, {
  method: 'POST',
  headers: {
    'Authorization': 'Basic <api-key>',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    langCode: 'EN_US',
    designPrompt: 'Warm, friendly, conversational voice with a subtle smile; natural pacing; clear articulation.',
    previewText: 'Hey! I am here. What can I help you with today?',
    voiceDesignConfig: {
      numberOfSamples: 1,
    },
  }),
});

const data = await response.json();
console.log(data);

{
  "langCode": "EN_US",
  "previewVoices": [
    {
      "voiceId": "your_workspace_id__design-voice-38b05df9",
      "previewText": "Hey! I am here. What can I help you with today? I would be happy to assist you with whatever you need. Just let me know how I can be of service.",
      "previewAudio": "<base64-audio>"
    }
  ]
}

{
  "code": 123,
  "message": "<string>",
  "details": [
    {
      "@type": "<string>"
    }
  ]
}