PSPDFKit API - Simplify how you process documents with a powerful and secure PDF API.
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
RapidAPI - API marketplace for finding and connecting to the world's top APIs.
Sheety - Turn any Google sheet into an API instantly, for free. Power websites, apps, or whatever you like, all from a spreadsheet. Changes to your spreadsheet update your API in realtime. Neat
Smallpdf - PDF document management and conversion suite
Sheetsu - Turn Google Spreadsheet into API