API ReferencePlatformSearchAir QualityGlobal air quality measurements from OpenAQ and UK DEFRA AURN monitoring network. 2 endpointsSearch OpenaqPOST/api/v1/search/openaqQuery OpenAQ for global air quality measurements from government monitoring stations. Actions: 'locations' (find monitoring stations by country, city, or coordinates), 'measurements' (get pollutant readings for a location), 'countries' (list available countries), 'parameters' (list measured pollutants). Requires free API key.Search Defra AirPOST/api/v1/search/defra-airQuery DEFRA UK Air Quality data from the Automatic Urban and Rural Network (AURN). Actions: 'stations' (list monitoring stations, optionally near a location), 'timeseries' (list available time series for a station), 'data' (get measurement data for a time series), 'phenomena' (list measured pollutants).Transport & MobilityTransport for London real-time data, UK bus open data, OpenStreetMap Overpass queries, and EV charging station locations.Geospatial SearchGeocoding and reverse geocoding (Nominatim), Overture Maps places and buildings, and what3words address conversion.