I am trying to checkin to Foursquare using the API, I have obtained the oauth_token and am doing a POST request with the oauth_token. According to the documentation the endpoint I'm hitting is https://api.foursquare.com/v2/checkins/add. This however returns a 400 Bad Request message. This is my code in C#
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://api.foursquare.com/v2/checkins/add?oauth_token"+ oauth_token + "&venueId=" + venueId);
request.Method = "POST";
HttpWebResponse webResponse = (HttpWebResponse)request.GetResponse();
Stream responseStream = webResponse.GetResponseStream();
When I do the same in curl however, it posts a checkin and I get a json response back
curl --data "oauth_token=[oaut_token]&venueId=[venueId]" https://api.foursquare.com/v2/checkins/add