The WePlann API is organized around REST. Our API has predictable, resource-oriented URLs, and uses HTTP response codes to indicate API errors. We use built-in HTTP features, like HTTP authentication and HTTP verbs, which are understood by off-the-shelf HTTP clients. We support cross-origin resource sharing, allowing you to interact securely with our API from a client-side web application (though you should never expose your API keys in any public website's client-side code). JSON or XML is returned by all API responses, including errors.
You can set the language you want to use in the request through the Content-type and Accept HTTP headers. You can use all possible combinations: