curl --request POST 'https://api.voicecheap.ai/v1/actions/tts_continue' \
  --header "x-api-key: $VOICECHEAP_API_KEY" \
  --header 'Content-Type: application/json' \
  --data '{"requestId":"284a861a-4da8-4d67-ad48-8123e76c8e91","historyId":"free-ebdb6d6f77433edf7c0169994cdce394f1c9c366e4d98cd4762a037cadea0ae4"}'

const input = {
  requestId: '284a861a-4da8-4d67-ad48-8123e76c8e91',
  historyId: 'free-ebdb6d6f77433edf7c0169994cdce394f1c9c366e4d98cd4762a037cadea0ae4',
};
const response = await fetch('https://api.voicecheap.ai/v1/actions/tts_continue', {
  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/tts_continue",
    headers={"x-api-key": os.environ["VOICECHEAP_API_KEY"]},
    json={"requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91", "historyId": "free-ebdb6d6f77433edf7c0169994cdce394f1c9c366e4d98cd4762a037cadea0ae4"},
    timeout=120,
)
body = response.json()
if not response.ok:
    raise RuntimeError(f"{body.get('code')}: {body.get('message')}")
print(body)

{
  "data": {
    "requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91",
    "status": "running",
    "pollAction": "action_request_get",
    "pollAfterSeconds": 5
  },
  "requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91"
}

{
  "data": {
    "requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91",
    "historyId": "free-ebdb6d6f77433edf7c0169994cdce394f1c9c366e4d98cd4762a037cadea0ae4",
    "status": "completed",
    "characterCount": 12,
    "previewEndIndex": null,
    "downloadUrl": "https://files.example.com/completed-preview-speech.mp3"
  },
  "requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91"
}

{
  "data": {
    "requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91",
    "operation": "tts_continue",
    "createdAt": 1792144800000,
    "updatedAt": 1792144820000,
    "status": "running",
    "pollAfterSeconds": 5
  },
  "requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91"
}

{
  "data": {
    "requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91",
    "operation": "tts_continue",
    "createdAt": 1792144800000,
    "updatedAt": 1792144820000,
    "status": "completed",
    "resultStored": false,
    "message": "The action completed. Retrieve its output from the corresponding history or resource action."
  },
  "requestId": "284a861a-4da8-4d67-ad48-8123e76c8e91"
}