How to access RHMAP a cloud app's endpoints?

Issue

• We have many cloud API created under https://example.us.feedhenry.com but for access I have to use FH sdk. I want to use a common class to connect server and endpoint and want to access data. kindly please guide me URL where I can access it.
• Access to endpoints refused with this message:

{
    "code": 401,
    "message": "Missing App API key(s)"
}