Do you prefer to take a data-centric approach to trading or investing? The following APIs provide stock price, fundamentals and/or other financial data.
Best API for accessing SEC filings and metadata:
SEC API - SEC API allows you to query the SEC filings corpus in real-time, download filings, access historical metadata etc. EDGAR is no longer very “scrapable” so you can’t replicate the SEC API on your own. SEC API is not affiliated with the Securities Exchange Commission.
Best all-purpose API for alternative data:
Nasdaq Data Link (formerly Quandl) - Quandl provides great APIs for a wide variety of data products, including traditional and alternative data sources.
Best XBRL creation and processing developer tools:
Aspose - Aspose provides .NET, Java, C++ and Python APIs for XBRL processing/creation as well as PDF processing and table extraction.