This page tests rest querying using digest authentication,

To change the endpoint of the rest query, set the GET variable 'endpoint' to an endpoint such as QA http://data.qa2.import.io:8888

EndpointTestResult
https://api.import.ioSigned: Simple POST 401 2004
https://api.import.ioSigned: Simple POST with missing Content-Type: application/json 401 2004
https://api.import.ioSigned: Simple GET 401 2004