RapidAPI key error despite providing valid application key

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1

I’m working with a RapidAPI endpoint and getting a frustrating error message. When I send my POST request through Postman, the response says:

{
    "error": "RapidAPI application key is missing. Visit https://docs.rapidapi.com/docs/keys for instructions on obtaining your API key."
}

The weird thing is that I’m definitely including my RapidAPI key in the request. Here’s how I’m structuring my API call:

https://eventfinderapiv1.p.rapidapi.com/searchEvents?x-rapidapi-host=YYYYYYYYYYYYYYYY&x-rapidapi-key=YYYYYYYYYYYYYYYY&content-type=application/json&authToken=YYYYYYYYYYYYYYYY

I’ve already tried creating a brand new API key from my RapidAPI dashboard, but I’m still getting the same error. Has anyone else run into this issue where the API claims the key is missing even though it’s clearly there in the request?

2

Same issue here! RapidAPI docs aren’t great at explaining this, but you need to keep headers and query params separate. Also double-check your API key is still working—mine got deactivated after hitting the rate limit.

3

You’re sending the API key and host as query parameters instead of headers - that’s the issue. RapidAPI needs both x-rapidapi-key and x-rapidapi-host in the request headers, not the URL. In Postman, go to the Headers tab and add them there as separate entries. Your request URL should just be https://eventfinderapiv1.p.rapidapi.com/searchEvents. This trips up a lot of people new to RapidAPI since other APIs let you put keys in the URL.

4

Had this exact issue a few months ago and wasted hours debugging it. Yes, header placement matters, but here’s what tripped me up - check for hidden spaces in your API key when you copy it from RapidAPI. I had a trailing space that wasn’t visible and kept getting the “missing key” error even with the header in the right place. Additionally, some RapidAPI endpoints are finicky about Content-Type formatting, so make sure to double-check that in your headers as well.

5

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