(require-extension http-client)

(use intarweb uri-common)
(client-software #f)

(let* ((uri (uri-reference "http://swapi.co/api/planets"))
       (req (make-request
             method: 'GET
             uri: uri
             headers: (headers '(user-agent (("scheme-swapi" #f #f)))))))

  (with-input-from-request req #f read-string))