Perigee

Connect it to your AI

Claude Code

claude mcp add --transport http perigee https://perigee-mcp.perigeeinfo.workers.dev/mcp

Claude, ChatGPT, Cursor and other apps

Add it as a custom connector with this URL (Streamable HTTP):

https://perigee-mcp.perigeeinfo.workers.dev/mcp

claude mcp add perigee -- npx -y perigee-mcp@1.9.5

Cursor, VS Code and other apps (mcp.json)

{
  "mcpServers": {
    "perigee": {
      "url": "https://perigee-mcp.perigeeinfo.workers.dev/mcp"
    }
  }
}

Tools it offers

19 tools, as the server itself reported during our check on Oct 31, 2026.

• perigee_findLooks up objects by name or identifier (English or French, accents optional): planets, moons, missions beyond Earth orbit, featured science satellites, any active Earth satellite (by name, NORAD or COSPAR id), landing an
• perigee_objectFacts about an object: name, agency, country, launch date, status, mission goals and notes, identifiers (NORAD, COSPAR, Horizons), official website, sources and verification date, a catalogue image with credit and licenc
• perigee_statePosition (km, ICRF/J2000 equatorial axes) and velocity (km/s) of an object at a date, relative to a centre (default: the body it orbits or stands on), with distance, altitude above the centre, speed, light time, whether
• perigee_orbitOrbit of an object: perigee and apogee altitudes (periapsis/apoapsis), period, inclination, eccentricity, semi-major axis. Earth satellites: the mean elements of their published element set, with the orbit regime (LEO, M
• perigee_passesWhen an Earth satellite (ISS = 25544, Tiangong = 48274, Hubble = 20580, or any NORAD number) passes over a place: rise, highest point and set times with direction (azimuth, compass point) and elevation, and whether it ca
• perigee_skyWhat is in the sky from a place at a date (default: now): day, twilight or night; the Sun with its next rise, set and twilights; the Moon with its phase, illuminated share, rise and set; each planet with its altitude, di
• perigee_eventsEvents over a period (default: the next 30 days, at most 31): Moon phases (super and micro full Moons), lunar perigee and apogee, lunar and solar eclipses (with a place: how they look from there), equinoxes and solstices
• perigee_tonightWhat there is to see tonight from a place (the coming night, or the current one): the night's start and end, the Moon (phase, illuminated share, rise and set), the planets visible to the naked eye, the visible passes of
• perigee_sky_conjunctionsApparent close pairings seen from a place over a period (default 7 days, at most 7): the Moon and the planets with each other and with the bright stars near the ecliptic (Regulus, Spica, Antares, Aldebaran, Pollux…), at
• perigee_shadowWhether an object is in sunlight, in the penumbra or in the umbra of the body it orbits (Earth satellites: the Earth's shadow; lunar and Martian orbiters: the Moon's or Mars'), and when it next enters and leaves the shad
• perigee_ground_trackThe path on the ground below an Earth satellite over one or two orbits: a list of points (time, latitude, longitude, height) and a GeoJSON MultiLineString split at the antimeridian, ready for a map. Up to 360 points.
• perigee_close_approachThe closest distance between two objects in space over a period (default 1 day, at most 1): when, how close (timed to a fraction of a second) and, for two Earth satellites, how fast they pass each other. For education on
• perigee_statsCounts of the active satellites: total, by owner (country or organisation, e.g. US, PRC, CIS, ESA), by operator (SpaceX, OneWeb, Amazon Kuiper…), by CelesTrak group (constellations, navigation, weather…), by orbit regime
• perigee_distanceCentre-to-centre distance between two objects at a date (km and astronomical units) and the light travel time, with the provenance of both positions. Example: from "earth" to "mars".
• perigee_distance_seriesDistances between two objects sampled evenly over a period (for a table or a chart), with the closest and farthest samples. The step limits their precision: use more steps for a precise closest approach.
• perigee_viewLink to Perigee showing an object (optionally at a date, paused or accelerated, followed), and an iframe snippet for a lesson page: the live 3D view without bars or panels. The embedding page can then drive the view and
• perigee_describe_viewTurns a Perigee link or embed URL (from perigee_view or a shared link) into words: a one-sentence alternative text for the image or iframe, and a description for lesson notes (which view, the selected object, where it is
• perigee_defineStudent-level definitions (secondary school) of the terms shown in Perigee: NORAD number, COSPAR id, apogee and perigee, inclination, orbital period, element epoch, ephemeris window, phase… Without a term, lists them all
• perigee_aboutWhat every answer rests on: data sources and when they were fetched, the models and their typical accuracy, catalogue sizes, frame, attribution and the educational-use disclaimer.

Questions