Yes Energy DataSignals API
DataSignals is Yes Energy's REST API for automated access to its North American wholesale power market data — nodal prices, transmission, generation, outages, constraints, weather, and fuels — covering real-time and 15+ years of history, with time-series and object endpoints intended for Excel, Python, R, and system integration. The service host is live and confirmed at https://services.yesenergy.com/PS/rest/, which returns HTTP 401 with `WWW-Authenticate: Basic realm="Realm"` to anonymous callers; HTTP Basic credentials are issued only to paying subscribers. The endpoint reference and code examples live in the customer knowledge base at help.yesenergy.com, which 302-redirects to the services.yesenergy.com customer login, so no endpoint list, no scopes, and no machine-readable specification could be verified anonymously. Nothing beyond the base path and auth scheme is recorded here because nothing beyond that is publicly observable.