提取API调用未设置标头

Question

Using the native fetch API, I have this code:

fetch('https://api.surveymonkey.net/v3/surveys/' + surveyId + '/responses/bulk?api_key=' + keySurveyMonkey + '&email=' + customerEmail, {
    method: 'GET',
    credentials: "include",
    headers: {
      "authorization": "Bearer xxxxxxxxxxxxxxxxxxxx"
    }
})
.then((response) => {
    return response.json();
})

For some reason the headers are not set, so the API is throwing 401.

Answer 1

It turned out that SurveyMonkey recently made some infrastructure changes, that have caused CORS headers not be be sent. I believe this is a temporary situation.

Answer 2

I have the same problem since friday 4. It works fine from Postman, does not work from my web application.

I tried to use Fiddler to see the difference and... magic... using Fiddler 4: it works fine! No change, just use Fiddler and it works...

What does that mean? Does Fiddler does something we need to do too?

Thanks for any advice.