The API reference of the Sustainable Web Analyzer. One request, GET /api/?url=…, analyzes a web page and returns JSON: page weight, file types, semantic HTML, green hosting, server locations, cookies and CO2 per visit with a grade from A+ to F. Below are every request parameter and the full response schema, generated from the OpenAPI spec. Use Try it out to run a real analysis from this page — it counts against the same budget as any other caller, ten checks a day.