the current steem appbase apis require the object name (e.g., as above, they require knowing "start" as well as the value associated). Including it in the request clarifies the mapping.
This is how restful implementations work typically. You have parameters to format the specific data you are interested in.
Some do work as plain URIs, like https://anyx.io/v1/database_api/get_dynamic_global_properties, as this has no parameters.
consider something like https://developers.steem.io/apidefinitions/#database_api.list_accounts
The mapping is intuitive, instead of POSTing
'{"jsonrpc":"2.0", "method":"database_api.list_accounts", "params": {"start":"steemit", "limit":10, "order":"by_name"}, "id":1}'
you can instead do
http://anyx.io/v1/database_api/list_accounts?start=steemit&limit=10&order=by_name
This is how restful implementations work typically. You have parameters to format the specific data you are interested in.