The Deep Audit API makes calls over HTTPS with returns in JSON or XML. There is a rate limit of 500 requests per hour. An application key is required and available by request from Deep Audit. Use the Deep Audit API to access publicly available financial data from over 20,000 companies for free. All data comes from the Securities and Exchange Commission and is extracted using XBRL. See the API home page for detailed information on implementing Deep Audit as well as some code examples.