405 Method Not Allowed

What This Error Means

This error is returned by your application when you attempt to make a POST request to your application, but the request is redirected to a GET request.

Depending on the application, this may result in your application returning either a 405 Method Not Allowed or a 404 Not Found status code.

Seemingly POST requests are being turned into GET requests.

Why This Error Can Occur

This occurs because your request was made using HTTP. Railway will attempt to redirect your insecure request with a 301 Moved Permanently status code.

When an HTTP client encounters a 301 Moved Permanently redirect, the client will follow the redirect. However, according to the HTTP/1.1 specifications, the client will typically change the request method from POST to GET when it follows the redirect to the new URL.

Solution

Ensure you are explicitly using https:// when calling your Railway-hosted services.

For example, if you are using curl to test your application, you should use the following command:

curl -X POST https://your-app.railway.app/api

Notice the https:// prefix.

This ensures that the request is made using HTTPS, avoiding the 405 Method Not Allowed error that your application would otherwise return.