Request all things about a specified channel

API
11

https://api.twitch.tv/helix/streams?user_login=easywithaces

This API endpoint does not require authentication.

As the response says you must provide a valid ClientID header.

As per the docs

The example request is

curl -H 'Client-ID: uo6dggojyb8d6soh92zknwmi5ej1q2' \
-X GET 'https://api.twitch.tv/helix/streams?first=20'

This is not a Flutter support forum.

Client ID should be sent as a Client-ID: whatever header

ClientID and Secret allows you to generate an App Access Token, which can be sent as an Authorization header Authorization: Bearer GeneratedToken But you still should send the ClientID header with it.

ClientID and Secret can be uses to generate a User Access Token, and that token can be sent as a Authorization header.

Currently you can’t get non authenticated requests working.

From my reading it should be (I can’t test this I don’t know flutter or have a suitable environment setup)

import 'dart:html';
import 'dart:convert';
void main() {
  HttpRequest.request(
    'https://api.twitch.tv/helix/streams?user_login=easywithaces',
    method: 'GET',
    requestHeaders: {
      'Client-ID': 'YourClientID'
    }
  )
  .then((resp) {
    print(resp.responseUrl);
    print(resp.responseText);           
  });
}

As I covered here