API Spyder is a SaaS-based attack surface discovery tool that provides an attacker’s view of your public-facing resources. It discovers API hosts, unauthorized hosting providers, and API-specific security issues.
You do not need to install or deploy any software on your premises for API Spyder to work, nor do you need to make any network changes. You simply enter the top-level domain you wish to crawl and it will then discover the API hosts and endpoints under that domain.