Categories › Web & Browser › Web search engines & search APIs
Earth curvature, horizon, flight, Sun and daylight calculators plus tested flat-earth claims.
Remote server: your requests and data go to flatearthscience.org. Claude Code: claude mcp add --transport http flat-earth-science https://flatearthscience.org/api/mcp · Claude app: Settings → Connectors → Add custom connector.
The tools this server listed when we connected to it, in its own words.
calculate_curvature — Calculates how much of a distant target the Earth's curvature hides, from the surface distance, the observer's eye height, the target's heigget_horizon_distance — Gives the distance to the horizon from an eye height above a smooth sphere, and how far a taller object such as a mast stays in straight sigcompare_flat_map_distance — Compares the distance between two cities on a north-polar flat-Earth map with their great-circle distance over a sphere. Returns both distanget_flight_distance — Calculates the great-circle distance between two places in kilometres, miles and nautical miles, with the initial and final compass bearingsget_sun_position — Calculates the Sun's altitude and compass bearing at a place, date and UTC time, with the shadow of a 1 m upright and the day's sunrise and get_daylight_hours — Calculates the length of daylight at a place on a date, with sunrise and sunset in UTC, for the UTC day from midnight to midnight. A place icompare_true_size — Shows how much a Mercator map distorts a country's area, from its real area and the latitude it is drawn at. Returns the real area, the areafind_claims — Searches the website's tested claims and flat-earth investigations, or returns one by id. Each result gives the claim, the verdict, the key Not tested by KitScout yet. When our harness runs it, pros, cons and the tasks we tried appear here, with the date and evidence.