Api Search is a free Chrome add-on developed by FSDT that aims to enhance the efficiency of searching for specific content within a webpage. When dealing with webpages that contain a vast amount of information, such as developers or testers trying to identify which API interface returns a particular piece of content, the usual approach is to repeatedly search through the Network module in Chrome's developer tools. However, this process can be time-consuming and inefficient, especially when dealing with a large number of API interfaces.

Api Search offers a global search functionality that allows users to search for keywords or URL links within the current webpage. The search can be further refined by adding filtering options such as js, css, img, html, or json. This allows users to narrow down their search scope. If no filtering options are set, Api Search will list all the content found based on the filtering options mentioned earlier, making it easy for users to review the results.