The Add-in provides spreadsheet functions and a VBA interface to query Alpha Vantage data. It can be downloaded here.
API References can be found here
Additional information on the output_arguments spreadsheet function argument can be found here.
A quick introduction to the Alpha Vantage Excel Ribbon interface can be found here.
The API references from above can also be accessed from the Alpha Vantage Ribbon Tab help menu
There is also support for Intellisense in the spreadsheets. All Add-in functions begin with AVGet…
The Intellisense also provides help on function arguments
Help is also available in the Insert Function dialog
When you click on one of the selections you get the argument helper window
Clicking on "Help on this function" brings up the API reference described above.
For support please contact firstname.lastname@example.org