I am trying to use the Magento REST API for a client to get details of customers, and orders, etc. I have setup a REST Consumer and I am trying to obtain an oauth access token and having issues. I have found a API call http://clients_magento_shop/api/rest/integration/access/token in the documentation, passing the username and password in the body, however I am getting the following error "Request does not match any route" - its like the API resource doesn't exist.
The application I am building will be a background task, so having the user login to Magento to authorize the request token isn't an option. So I have tried to fake a login and authorization by GET and POST operations through C#. This works great on a standard Magento setup but because the client is using a hosting single signon provider, I cant get to the login page to obtain the Form-Key, which is part of the login POST. Therefore I am stuck.