curl --request POST 'https://api.voicecheap.ai/v1/actions/voices_upload_initialize' \
  --header "x-api-key: $VOICECHEAP_API_KEY" \
  --header 'Content-Type: application/json' \
  --data '{"filename":"voice-sample.wav","contentType":"audio/wav","fileSize":1048576,"kind":"voice_sample","requestId":"13579bdf-2468-4ace-8bdf-0123456789ab"}'

const input = {
  filename: 'voice-sample.wav',
  contentType: 'audio/wav',
  fileSize: 1048576,
  kind: 'voice_sample',
  requestId: '13579bdf-2468-4ace-8bdf-0123456789ab',
};
const response = await fetch('https://api.voicecheap.ai/v1/actions/voices_upload_initialize', {
  method: 'POST',
  headers: {
    'x-api-key': process.env.VOICECHEAP_API_KEY,
    'Content-Type': 'application/json',
  },
  body: JSON.stringify(input),
});
const body = await response.json();
if (!response.ok) throw new Error(body.code + ': ' + body.message);
console.log(body);

import os
import requests

response = requests.post(
    "https://api.voicecheap.ai/v1/actions/voices_upload_initialize",
    headers={"x-api-key": os.environ["VOICECHEAP_API_KEY"]},
    json={"filename": "voice-sample.wav", "contentType": "audio/wav", "fileSize": 1048576, "kind": "voice_sample", "requestId": "13579bdf-2468-4ace-8bdf-0123456789ab"},
    timeout=120,
)
body = response.json()
if not response.ok:
    raise RuntimeError(f"{body.get('code')}: {body.get('message')}")
print(body)

{
  "data": {
    "uploadId": "a1b2c3d4-e5f6-4789-8abc-def012345678",
    "key": "uploads/account-user/a1b2c3d4-e5f6-4789-8abc-def012345678-voice-sample.wav",
    "partSize": 5242880,
    "maxConcurrency": 4
  },
  "requestId": "13579bdf-2468-4ace-8bdf-0123456789ab"
}

{
  "data": {
    "requestId": "13579bdf-2468-4ace-8bdf-0123456789ab",
    "operation": "voices_upload_initialize",
    "createdAt": 1792144800000,
    "updatedAt": 1792144820000,
    "status": "running",
    "pollAfterSeconds": 5
  },
  "requestId": "13579bdf-2468-4ace-8bdf-0123456789ab"
}

{
  "data": {
    "requestId": "13579bdf-2468-4ace-8bdf-0123456789ab",
    "operation": "voices_upload_initialize",
    "createdAt": 1792144800000,
    "updatedAt": 1792144820000,
    "status": "completed",
    "resultStored": false,
    "message": "The action completed. Retrieve its output from the corresponding history or resource action."
  },
  "requestId": "13579bdf-2468-4ace-8bdf-0123456789ab"
}