Excel Add-in to call REST API

Job ID: 36473038

Budget: €750 – €1,500 EUR

I want to make an Excel Add-In developed with the newest Office.js framework from Microsoft. The plugin will be distributed both on Excel for desktop and on Office 365.

The purpose of the plugin is filling some cells with the response of a REST API call. I will provide the spec of the API myself. The API is asynchronous (ie the code must poll) and the plugin must account for a MASSIVE number of input rows (think in the order of thousands).

The API is authenticated and paid, so the user must input the credentials via a dedicated UI and should also be able to know in advance how much is going to spend (let's say each call is priced at 0.99$). Failing calls must be retried.

The plugin must have a dedicated ribbon and the desktop version must be packaged in a MSI, EXE or other format easy to be installed by non-tech users (also Excel marketplace).
Related categories: JavaScript Excel Office Add-ins