A
licenseA
qualityB
maintenanceCalculate the altitude, rise, and set times of celestial objects (Sun, Moon, planets, stars, and deep-space objects) for any location on Earth.
21
531 PyPI
MIT
Flat Earth Science
Server Details
Earth curvature, horizon, flight, Sun and daylight calculators plus tested flat-earth claims.
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- Status
- Healthy
- Uptime
- 100.0% over the last 24 hours
- Last Tested
- Transport
- Streamable HTTP · MCP 2025-11-25
- URL
- Repository
- pyxlino/flatearthscience-mcp
- GitHub Stars
- 0
- Server Listing
- Flat Earth Science MCP
- ChatGPT
- –
- Claude
- –
TDQS
A3.9/5.0
Scored across 8 tools
Disambiguation3/5
The tools are mostly distinct, but three pairs overlap: calculate_curvature and get_horizon_distance both return horizon and shared sightline values; compare_flat_map_distance and get_flight_distance both compute inter-city distances; get_daylight_hours and get_sun_position both return sunrise/sunset. Descriptions help, but an agent could still misselect for a simple distance or sunrise query.
Naming Consistency5/5
All names use snake_case and begin with a verb (calculate_, compare_, find_, get_), forming a predictable verb_noun pattern. The verbs vary appropriately by action, with no camelCase or vague names.
Tool Count5/5
With 8 tools, the set is well within the typical 3-15 range for a calculator/reference server. Each tool maps to a distinct calculation or search task, even if some overlap in outputs.
Completeness4/5
The surface covers the core flat-earth science checks: curvature, horizon, distances, map distortion, daylight, sun position, and claim lookup. A minor gap is the lack of a tool to list the 20 cities or their coordinates, which the other tools assume as input.
Available Tools
8 toolscalculate_curvatureEarth curvature calculatorARead-onlyIdempotentInspect
Calculates how much of a distant target the Earth's curvature hides, from the surface distance, the observer's eye height, the target's height and an assumed refraction coefficient. Returns the hidden and visible height, the tangent-plane drop, the horizon distance and dip, the maximum mutual sight-line range and the midpoint bulge on a smooth sphere of radius 6,371.0084 km.
Inputs: distance (required), units, eyeHeight, refraction, +1 more. Returns: item, view, request
compare_flat_map_distanceFlat map against the sphereARead-onlyIdempotentInspect
Compares the distance between two cities on a north-polar flat-Earth map with their great-circle distance over a sphere. Returns both distances and the factor by which the map stretches or shrinks the pair.
Inputs: to (required), from (required). Returns: item, view, request
compare_true_sizeTrue size on a Mercator mapARead-onlyIdempotentInspect
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 area multiplier at the country's own latitude and at a chosen latitude, and the size it appears at each. Covers the nine countries and regions in the website's size table.
Inputs: country (required), latitude. Returns: item, view, request
find_claimsTested claimsARead-onlyIdempotentInspect
Searches the website's tested claims and flat-earth investigations, or returns one by id. Each result gives the claim, the verdict, the key evidence and the link to its page; an empty query lists all of them.
Inputs: id, query. Returns: item, view, items, query, +4 more
get_daylight_hoursDaylight hoursARead-onlyIdempotentInspect
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 is one of the website's 20 cities or a latitude with an optional longitude.
Inputs: date, place, latitude, longitude. Returns: item, view, request
get_flight_distanceFlight distanceARead-onlyIdempotentInspect
Calculates the great-circle distance between two places in kilometres, miles and nautical miles, with the initial and final compass bearings. Each end is one of the website's 20 cities or a latitude and longitude.
Inputs: to, from, toLatitude, toLongitude, +2 more. Returns: item, view, request
get_horizon_distanceHorizon distanceARead-onlyIdempotentInspect
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 sight. Returns the observer's horizon distance, the range added by the target height and the maximum shared sightline.
Inputs: eyeHeight (required), units, targetHeight. Returns: item, view, request
get_sun_positionSun positionARead-onlyIdempotentInspect
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 sunset in UTC. A place is one of the website's 20 cities or a latitude and longitude; without a date and time the result is for the current moment.
Inputs: date, time, place, latitude, +1 more. Returns: item, view, request
Tool Schema Changelog
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
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