SIX Web API
Single API onto the SIX financial data universe - real-time, intraday, end-of-day, and historical pricing across asset classes, reference data, corporate actions, tax, and ESG datasets from 900+ price sources - using REST/JSON, GraphQL, and WebSocket streaming with MTLS certificate authentication. Documentation, sample code, and a Swagger test interface live behind the SIX API Portal; access is sales-gated with demo access by request.