expected behavior of an API key manager would be:

• a new page with "create new key"
• select the endpoints you want to give that key access to
• for each selected endpoint, assign default parameters
• save to db, return the API key, prompt user to save it
• when editing, you can change the default parameters for the endpoints, add/remove endpoints
• when querying the endpoint with API key, default params are applied, etc.
• On the query page, it might be simpler to say "Create a new scoped API key [here](link to create an api key for that query)"
• let the user user their existing api key for that destination, and tell them they can create more keys on this new page.