Sheffield Solar API
The University of Sheffield's own research API, built and run by the Sheffield Solar group in the Department of Physics and Astronomy. It publishes PV_Live — near-real-time and historical estimates of solar photovoltaic generation on the GB transmission network, by Grid Supply Point and Public Electricity Supplier region — plus PV_Live_EU over European NUTS regions and PV_Forecast day-ahead forecasts. PV_Live read endpoints are keyless and answered 200 on probe; PV_Forecast returns 401 without a registered X-User-Id header. The institution publishes its own OpenAPI 3.1 document, a Swagger UI and a Redoc rendering. This is the one contract in this repository that Sheffield actually wrote.