Encountering 'Invalid API Key' Issue in Postman with RapidAPI

Other Questions RapidAPI
1

When using RapidAPI via Postman, I receive a 404 ‘Invalid API Key’ error despite configuring my key in a separate module. See sample code below:

const myToken = "abcXYZ987";
export { myToken };

import { myToken } from './settings';

fetch("https://api.alternativeweather.com/info?city=Paris", {
  method: "GET",
  headers: {
    "api-key": myToken,
    "api-host": "api.alternativeweather.com"
  }
})
.then(res => res.json())
.then(data => console.log(data))
.catch(err => console.error(err));

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>API Test</title>
  </head>
  <body>
    Check console for API response.
    <script type="module" src="scripts/app.js"></script>
  </body>
</html>
2

I encountered a similar issue previously, and after some troubleshooting I discovered that the problem was not merely with the export/import mechanism, but rather with the API request headers and endpoint configuration. My API required the header key to be named differently. I replaced ‘api-key’ with the documented header name and adjusted the host header accordingly. It also helped to confirm that the URL you are targeting is the RapidAPI endpoint and not a direct API endpoint. Ensuring these details lined up with the API documentation resolved the error in my case.

3

hey, i fixed it by double-checking my env var and the exact header casing. seems postman sometimes messes with minor typos in headers. Try using the documented header names and ensure no extra spaces in your token. hope this helps!

4

Based on my experience with similar issues, I found that the problem might not be with Postman or RapidAPI at all but rather with the way the key is being exported and imported in JavaScript modules. It is crucial to verify that the token is correctly passed through your module imports, as even a slight mismatch or initialization issue could trigger a 404 response. In one instance, adjusting the placement of the module import resolved the issue immediately. Checking the API documentation for any required header format changes also helped me troubleshoot.