bobadilla-tech/requiems-api ? reverse-engineered prompt

Build me a Go backend for a SaaS API that gives one API key for things like signup protection, validation, fraud checks, payments intelligence, and global data lookups.

I want it to feel like a real product, with clear REST endpoints, auth, structured JSON responses, and good error handling. It should have a simple way to combine checks into one request, like protecting a signup by analyzing email, phone, and IP address together, and returning a risk score with flags and signals. Please include solid docs, example requests, and a nice developer experience so it is easy to test and understand.

If there are any tricky external data sources or current best practices you need, look up the latest docs online and use them. Also add tests and whatever setup is needed so the project can run cleanly from the repo.