Yes, it is working. First of all, thank you. I wasn't aware of that RapidAPI blog post :-) I am not a PHP programmer, so I can't help you in deep detail, but you may experience a 404 because you're not providing all the requested headers (eg. "content-type": "application/json"). You can test the endpoint quite easily here: https://rapidapi.com/lordkada1/api/kvstore?endpoint=55852764e4b095ed24aeb034 Let me know if it works. My best, CA