Macro Assistance for OGL Sheet

Hello wonderful peoples! I am trying to set up a macro with the OGL sheet and having a time and a half with it. My inquiry to the group is can a macro be set for spell attacks that will query the targets AC or instruct a saving throw without the need of an API? My GM doesnt have AP's installed in his game. This would also tie in to a selection I found roaming the forums that shows a visual effect during spell casting. I got the simplified idea down, as I can get the spell cast, and display the visual effect. It is the displaying if it is a hit or not/making the saving throw I am not sure if it can be done without some sort of API scripting.

You can technically get the armor class by using @{target|npc_ac} and do respective saving throws by calling the attributes. However, I know that as a DM I would not want my players having access to this information. As for the visual effects, doesn't that require  api?

It does not appear to. I found a line "/fx beam-fire @{selected|toekn_ID} @{target|Target 1|token_ID}" and used that in a one shot I had created without any API installed and it seemed to work fine. As for the DM's opinion, I am seeking to test the function in the one shot and then create the macro with his blessing only. I am thinking the AC one will get shot down, as I partially agree with your thought, but having the target make a saving throw I personally would allow at my table as it saves me having to do it.  Thank you for the insight as well Kyle!