If the ODataQueryBuilder site keeps redirecting to HTTPS, even when you type HTTP, you likely had HSTS enabled. HSTS is a browser setting. Basically it forces a known page to use the HTTPS if it has seen that URL work with HTTPS before. If you remove the (s) and try HTTP, it will keep changing.
This is because the main NFA website may be setup to use HTTPS but the ODataQueryBuilder does not yet support it.
You can add the NFA site as an exception in your browsers HSTS setting by following these steps if your group policies permit:
You can also turn on HTTPS for OData. Please contact support for assistance.