Google AppScript调用ElevenLabs API遇422错误的解决求助

问题场景 #

在Google AppScript中集成ElevenLabs文本转语音API，期望获取返回的音频文件进行后续操作，但始终收到422状态码的错误响应。

初始错误代码 #

apiUrlEndPoint = "https://api.elevenlabs.io/v1/text-to-speech/Xb7hH8MSUJpSbSDYk0k2"

const options = {
  method: 'POST',
  headers: {
    'xi-api-key': xiApiKey
    'Content-Type': 'application/json',
  },
  body: '{"text":"This is the text to convert","model_id":"eleven_multilingual_v2","voice_settings":{"stability":1,"similarity_boost":1}}',
  muteHttpExceptions: true
};

const response = UrlFetchApp.fetch(apiUrlEndPoint, options);

错误响应信息 #

Response Code: 422
Response Body: {"detail":[{"loc":["body","text"],"msg":"field required","type":"value_error.missing"}]}
Request failed with status code 422

最终可行代码（2024年8月12日更新） #

var apiUrlEndPoint = "https://api.elevenlabs.io/v1/text-to-speech/"+voiceId;
var options = {
  method: 'POST',
  headers: {
    'xi-api-key':apiKey,
    'Content-Type': 'application/json',
  },
  payload: JSON.stringify({
    "text": inputText,
    "model_id": modelId,
    "voice_settings": {
      "stability": stability,
      "similarity_boost": similarity,
      "use_speaker_boost": speakerBoost,
      "style": style
    }
  }),
  muteHttpExceptions: true
};

response = UrlFetchApp.fetch(apiUrlEndPoint, options);

关键修复说明 #

• Google AppScript的UrlFetchApp.fetch()方法中，POST请求的请求体需使用payload字段，而非普通JavaScript中的body字段
• 初始代码的请求头中，xi-api-key与Content-Type之间缺少逗号，导致格式错误
• 通过JSON.stringify()将请求参数对象转为标准JSON字符串，确保请求体格式符合API要求

内容的提问来源于stack exchange，提问作者kenitech