Swimlanes.io is a free webapp for making sequence diagrams. You simply edit the text on the left and the diagram is updated in real time. You can download your sequence diagrams as images or distribute with a link.
Title: Computer Vision Vietnam: Face Search Client -> Computer Vision Vietnam API: Face search note _:``` POST https://cloud.computervision.com.vn/api/v2/face_search/images image: the input image used to search ``` Client <-- Computer Vision Vietnam API: Return result