I’m working with a RapidAPI endpoint and keep getting an error message even though I’m including my API key. When I make a POST request through Postman, I receive this response:
{
"error": "RapidAPI application key missing. Visit the documentation to obtain your API key."
}
Here’s the thing - I am actually sending the API key in my request. My endpoint URL looks like this:
I already tried creating a fresh API key from my RapidAPI dashboard but the same error keeps happening. Has anyone encountered this issue before? What could be causing the API to not recognize my key even though it’s clearly present in the request?
Same thing happened to me last month - took forever to figure out. It’s definitely the header placement like everyone said, but double-check your x-rapidapi-host value too. It needs to match exactly what’s in the RapidAPI docs for that endpoint. Sometimes there’s a subtle difference between what you think it should be and what it actually is. Some RapidAPI endpoints are case-sensitive with headers, so use lowercase x-rapidapi-key and x-rapidapi-host. Once I moved everything to proper headers and fixed the host value, my requests worked immediately.
You’re likely placing the RapidAPI headers in the URL rather than the intended headers section. RapidAPI requires that x-rapidapi-key and x-rapidapi-host be sent as HTTP headers, not as URL parameters. In Postman, navigate to the Headers tab and enter those values accordingly. Your URL should simply be https://weatherapiv2.p.rapidapi.com/forecast. Additionally, if content-type is necessary, it should also be included in the headers. I encountered a similar confusing error when I first tried to use RapidAPI.
i had the same error, it can be realy tricky! make sure to send x-rapidapi-key and x-rapidapi-host in the headers not the query string. if changes r made right, it’ll work. trust me, its a common mistake.