414 Guzzle Http Client中的URI太大了

Question

I use Guzzle Client Http to send base64 encoded image to api, unfortunately that response 414 URI too large exception. When I do the same action with direct Curl , it works. My Api server receives only json type data. I don't want to change any setting of PHP and Server. Pls advice what setting should I change to use with Guzzle.