Most legitimate API services have a public face: a company website, documentation, a support contact, and ideally a history of operation. api.fdbcloudconnector.com has none of that. The domain is locked behind privacy protections, the homepage returns a generic 'Unauthorized' message, and there is no record of the site in the Wayback Machine. That doesn't automatically mean it's a scam, but it does mean you are integrating with a black box.
If you are a developer considering using this API, the first question should be: who owns it? Without a company name, a privacy policy, or any way to reach a human, you have no recourse if something goes wrong. The hosting on Amazon and the valid TLS certificate are positive signals, but they are easy to obtain. The missing security headers and the lack of DNSSEC are minor issues compared to the fundamental identity gap.
Before you send any data or payment through this endpoint, ask for documentation. A real API provider will have a separate website for developer resources. If none exists, you are better off looking for a more transparent alternative. In short, api.fdbcloudconnector.com reviews are nonexistent, and the is api.fdbcloudconnector.com a scam question cannot be answered with confidence because the evidence is too thin. Until more information surfaces, treat this API with serious caution.