Corrently IO

# Corrently IO > Public developer and integrator documentation for Corrently/STROMDAO energy APIs, GrünstromIndex, market data, Energy Application Framework, and selected Cernion Energy Tools references. Corrently IO is the public BookStack documentation surface for developer-facing STROMDAO/Corrently resources. Use the links below as canonical entry points. API keys, rate limits, commercial terms, and legal or tariff interpretations are not defined in this file; follow the linked public documentation and policy pages. ## Developer entry points - [Corrently Energy APIs](https://corrently.io/books/corrently-energy-apis): canonical BookStack index for public Corrently energy API documentation. - [Public Corrently APIs](https://corrently.io/books/corrently-energy-apis/page/offentliche-corrently-apis): overview of public API families and links to the technical console documentation. - [Corrently APIs shelf](https://corrently.io/shelves/corrently-apis): thematic collection for API-related books and implementation resources. - [Fair Use Policy](https://corrently.io/books/stromdao-gmbh/page/fair-use-policy): usage policy and rate-limit guidance for public API access. ## API reference pages - [CO2 Advisor API](https://console.corrently.io/co2advisor.html): CO2-intensity forecast and load-shifting guidance by location. - [CO2 Meter API](https://console.corrently.io/co2meter.html): CO2-emission tracking for energy use. - [Energy Schedule API](https://console.corrently.io/schedule.html): schedule-oriented energy application support. - [GrünstromIndex API](https://console.corrently.io/gsi.html): regional green-electricity forecast data. - [Marketdata API](https://console.corrently.io/marketdata.html): electricity market data and forecasts. - [PHEV Charge Or Fuel API](https://console.corrently.io/phevChargeOrFuel.html): decision support for plug-in hybrid charging versus fuel use. - [Photovoltaic Generation Forecast API](https://console.corrently.io/pvgeneration.html): p