Tieket # 92 asked QUERY_PARAMS_ALLOWED to add 'access_token' speech-javascript-sdk / text-to-speech / synthesize.js Because it has not been added to QUERY_PARAMS_ALLOWED, this is a state that does not work. Also, when adding 'access_token' to QUERY_PARAMS_ALLOWED https://github.com/watson-developer-cloud/speech-javascript-sdk/commit/3042c9adfc71f4b5e89a34908a6ce9400c64f324#diff-117eb642eb2c4d69902800c2880fc9cd `|| key === 'access_token'` has been deleted, you should add this. I'd appreciate your correspondence - [x] Steps to reproduce - Same as # 92 - [x] Expected behavior - Same as # 92 - [x] Actual behavior - Same as # 92 - [x] Browser version (s) - Firefox 63.0.1 (64 bit) - [x] SDK version - v 0.35.2