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Editorial Team
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Asked: 2026-06-13T00:38:36+00:00

I’m having the famous error : Server returned HTTP response code: 403 for URL.

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I’m having the “famous” error : Server returned HTTP response code: 403 for URL.
I have to send a lot’s of queries (+-2000) to fill my database. However, the 50-100 first work, then all the following trigger error 403. I can’t figure out why …

Here is my code :

public static ArrayList<String> querying(String name){
    URL url = null;
    String inputLine;
    ArrayList<String> resultArray = new ArrayList<String>();
    BufferedReader in;
    try {
        url = new URL(s);
    } catch (MalformedURLException e) {
        e.printStackTrace();
    }    
    try {
        HttpURLConnection con = (HttpURLConnection) url.openConnection();
        con.addRequestProperty("User-Agent", "Mozilla/4.0");
        in = new BufferedReader(new InputStreamReader(con.getInputStream()));
        while ((inputLine = in.readLine()) != null) {
            ...
        }
        in.close();
        con.disconnect();

    } catch (IOException e) {
        e.printStackTrace();
    }
    return resultArray;
}

where s is :

"https://www.googleapis.com/freebase/v1/mqlread?query={\"id\":\"/en/"+name+"\", \"name\": null, \"type\":\"/base/popstra/celebrity\",\"/base/popstra/celebrity/friendship\": [{\"participant\": [] }] }".replace(" ", "")

I tried to find some information about this error on the web, but despite what I found (for example “addRequestProperty) it’s still not working.

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1 Answer

  1. Editorial Team

    The URL in your question suggests you’re not using an API key.

    • With an API key, you should be able to do 100k/10k reads/writes per day (according to Freebase documentation)

    • Without an API key your quota is limited to a much smaller number and you’ll receive a 403 response when you go over. This is to prevent abuse of the API infrastructure so everyone can get a fair share of API requests.

    Please follow the instruction on Getting Started in the Freebase documentation to get an API key.

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