Markit is a pricing and valuation service focused on providing end-of-day services that aggregate valuation information on credit default swaps. The Markit Data APIs give developers access to the data collected by Markit. Currently, there are APIs available for Company Lookup, Stock Quotes, and Timeseries data. The APIs are available in REST and SOAP protocols and will return XML, JSON, or JSONP. Full documentation, code samples, and demos are available on the site's GitHub page.