The cloudXLS API accepts a CSV file and converts into an XLS or XLSX spreadsheet. It can also receive an XLS or XLSX file to be reformatted into an existing spreadsheet. Templates exist for creating more sophisticated spreadsheets that generate graphical components. Default responses come in JSON with a URL for direct download.
The following is a list of SDKs from our SDK directory that matched your search term. Though your definition of an SDK may differ, in our world, we define SDKs as platform- specific tools for consuming existing APIs of the sort we list in our API directory. For example, the Ruby SDK for consuming the Twitter Ads API. If you think an SDK, API, or other asset is missing from our directory, be sure to check our guidelines for making contributions to ProgrammableWeb.