GET works but POST does not for 'Access-Control-Allow-Origin'

[richarddavenport]

The API I'm calling allows all origins. When I do a GET request it works, but when I do a POST, my browser reports a 'Access-Control-Allow-Origin' not set, but I know that's not the case.

GET:

reqwest({
  url: base,
  crossOrigin: true,
  success: function (trackers) {
    callback(trackers)
  }
})

POST:

reqwest({
  url: base,
  method: 'post',
  contentType: 'application/json',
  data: '"' + title + '"',
  crossOrigin: true,
  error: function (res) {
    console.log(res)
  },
  success: function (res) {
    callback(res)
  }
})

[richarddavenport]

API issue, the API didn't allow headers.