curl --request POST 'https://api.voicecheap.ai/v1/actions/projects_update' \
  --header "x-api-key: $VOICECHEAP_API_KEY" \
  --header 'Content-Type: application/json' \
  --data '{"projectId":"project_launch_2026","requestId":"41321bda-e243-4b6f-96a4-622cd047c991","changes":{"projectName":"Product launch — English","translationInstructions":"Keep product names unchanged.","keepBackgroundMusic":true,"subtitles":{"isEnable":true,"source":"translated"}}}'

const input = {
  projectId: 'project_launch_2026',
  requestId: '41321bda-e243-4b6f-96a4-622cd047c991',
  changes: {
    projectName: 'Product launch — English',
    translationInstructions: 'Keep product names unchanged.',
    keepBackgroundMusic: true,
    subtitles: {
      isEnable: true,
      source: 'translated',
    },
  },
};
const response = await fetch('https://api.voicecheap.ai/v1/actions/projects_update', {
  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/projects_update",
    headers={"x-api-key": os.environ["VOICECHEAP_API_KEY"]},
    json={"projectId": "project_launch_2026", "requestId": "41321bda-e243-4b6f-96a4-622cd047c991", "changes": {"projectName": "Product launch — English", "translationInstructions": "Keep product names unchanged.", "keepBackgroundMusic": True, "subtitles": {"isEnable": True, "source": "translated"}}},
    timeout=120,
)
body = response.json()
if not response.ok:
    raise RuntimeError(f"{body.get('code')}: {body.get('message')}")
print(body)

{
  "data": {
    "projectId": "project_launch_2026",
    "projectName": "Product launch — English",
    "status": "success",
    "workflow": "translation",
    "originalVideoUrl": "https://media.example.com/launch/original.mp4",
    "originalLanguage": "fr",
    "targetLanguages": [
      "english"
    ],
    "duration": 75,
    "createdAt": 1792152000000,
    "progress": {
      "step": "done",
      "transcriptionProgress": 100,
      "transcriptionStatus": "success"
    },
    "translations": [
      {
        "workId": "5f8423d1-e4c0-4f80-9e3f-eed959389e24",
        "translatedVersionId": "0fa684f3-4997-4d7a-9424-16d1f9ac849c",
        "targetLanguage": "english",
        "status": "completed",
        "currentStep": "done",
        "progress": 100,
        "createdAt": 1792152060000,
        "completedAt": 1792152300000,
        "translatedVideoUrl": "https://media.example.com/launch/english.mp4",
        "translatedAudioUrl": "https://media.example.com/launch/english.mp3",
        "settings": {
          "voiceCloning": true,
          "uploadType": "video",
          "keepBackgroundMusic": true,
          "keepOriginalVoice": false,
          "originalVoiceVolume": 30,
          "subtitles": {
            "isEnable": false,
            "source": "translated"
          },
          "smartSync": true,
          "dubbingMode": "translate",
          "voiceIsolatorOption": "studio"
        }
      }
    ],
    "segmentStructureRevision": 3,
    "numberOfSpeakers": 1,
    "translationInstructions": "Keep product names unchanged.",
    "isReadyForDubbing": true,
    "settings": {
      "voiceCloning": true,
      "customVoice": false,
      "customVoiceId": "",
      "keepBackgroundMusic": true,
      "keepOriginalVoice": false,
      "originalVoiceVolume": 30,
      "activeSpeakerDetectionEnabled": false,
      "subtitles": {
        "isEnable": true,
        "source": "translated"
      },
      "smartSync": true,
      "voiceIsolatorOption": "studio",
      "voiceCloningSettings": {
        "stability": 0.5,
        "similarity": 0.75
      }
    }
  },
  "requestId": "41321bda-e243-4b6f-96a4-622cd047c991"
}

{
  "data": {
    "requestId": "41321bda-e243-4b6f-96a4-622cd047c991",
    "operation": "projects_update",
    "createdAt": 1792144800000,
    "updatedAt": 1792144820000,
    "status": "running",
    "pollAfterSeconds": 5
  },
  "requestId": "41321bda-e243-4b6f-96a4-622cd047c991"
}

{
  "data": {
    "requestId": "41321bda-e243-4b6f-96a4-622cd047c991",
    "operation": "projects_update",
    "createdAt": 1792144800000,
    "updatedAt": 1792144820000,
    "status": "completed",
    "resultStored": false,
    "message": "The action completed. Retrieve its output from the corresponding history or resource action."
  },
  "requestId": "41321bda-e243-4b6f-96a4-622cd047c991"
}