An agent can connect on its own if it already holds THIRDTRAIL_TOKEN.Remote endpoint behind a static API key or header. The registry never sees the value; the agent fills the placeholder.
Per day: high and low waters together with sunrise, sunset, golden hour, twilight and moon phase in a single call. The planning tool for coastal photography, fishing and shore work. Pass elevation when you know it: it shifts the sun and moon times — roughly three minutes at clifftop height — but never the tide heights, which do not depend on where the observer stands.
after · 69% of words in common
Per day: high and low waters together with sunrise, sunset, golden and blue hour, twilight and moon phase in a single call. The planning tool for coastal photography, fishing and shore work; use it instead of calling get_tide_extremes and get_sun_moon_times separately. Pass elevation when you know it: it shifts the sun and moon times — roughly three minutes at clifftop height — but never the tide heights, which do not depend on where the observer stands. Defaults: from today, 2 days or the plan's limit if lower. Requires an API key on a paid Tides plan.
Water-height time series at any coastal point, sampled at a fixed step. Metres relative to mean sea level, not chart datum.
after · 30% of words in common
Water height at a coastal point at a fixed step: a list of time and height_m pairs. Use it to plot a tide curve or read the height at a particular time; for just the highs and lows use get_tide_extremes. Metres relative to mean sea level, not chart datum. Defaults: from today, 2 days, and the finest step the plan allows, but no finer than 10m. Requires an API key on a paid Tides plan.
High and low water times and heights at any coastal point, from the FES2022 global tide atlas. Heights are metres relative to MEAN SEA LEVEL, not chart datum — never use for navigation.
after · 43% of words in common
High and low water times and heights at any coastal point, from the FES2022 global tide atlas: a list of events, each with type (high or low), time and height_m. Use it for when high or low tide is; for a continuous curve use get_tide_heights, and for tides together with sunrise, golden hour and moon phase use get_tide_window. Heights are metres relative to MEAN SEA LEVEL, not chart datum — never use for navigation. Defaults: from today, 2 days or the plan's limit if lower. Requires an API key on a paid Tides plan.
Daily Light Integral — integrated photosynthetically active radiation per day, the horticultural measure used for growth and supplemental-lighting planning.
after · 24% of words in common
Clear-sky Daily Light Integral in mol/m²/day for each day in a range: photosynthetically active radiation integrated from sunrise to sunset. Use it to plan crop growth or supplemental greenhouse lighting; it assumes cloudless skies, so treat it as the ceiling for the site. Pass from and to together for a range of UTC days, or neither for today. Requires an API key on a paid Solar plan.
The sun's track across a single day, sampled at a fixed interval. Used for shading studies, PV siting and panel-angle planning.
after · 34% of words in common
The sun's azimuth and altitude through one UTC day, sampled every interval: a list of timestamped positions. Use it for shading studies, PV siting and panel-angle planning; for a single instant use get_solar_position. date defaults to today and interval to 15m. Requires an API key on a paid Solar plan.
Solar azimuth, altitude and zenith plus clear-sky irradiance (direct, diffuse and global horizontal, W/m²) at an instant. NREL SPA-equivalent on JPL DE421; irradiance from the Bird model.
after · 31% of words in common
The sun's position at one instant: azimuth, altitude, zenith, declination, hour angle and equation of time, plus clear-sky irradiance (GHI, DNI and DHI in W/m²) when include asks for it and the plan covers it. Use it for where the sun is at a given moment; for its track through a whole day use get_solar_path, and for rise and set times use get_sun_moon_times. timestamp defaults to now. Positions are NREL SPA-equivalent on JPL DE421; irradiance comes from the Bird clear-sky model. Requires an API key on a paid Solar plan.
The five daily Islamic prayer times for a location, elevation-corrected. Supports every major calculation school and both Asr shadow rules.
after · 25% of words in common
Fajr, sunrise, dhuhr, asr, maghrib and isha for one date at a location, elevation-corrected. Use it for Islamic prayer schedules; for general sunrise, sunset and twilight use get_sun_moon_times. school is required and sets the fajr and isha rules; asr_method picks the shadow rule and defaults to shafi. date defaults to today. Requires an API key on a paid Ephemerides plan.
Sunrise, sunset, solar noon, twilight phases, moonrise, moonset and moon phase for any point on Earth, on any date. Accepts elevation, which shifts sunrise and sunset at altitude — pass it whenever you know it.
after · 29% of words in common
Sunrise, sunset, solar noon, civil, nautical and astronomical twilight, golden and blue hour, moonrise, moonset and moon phase for a location, one entry per day. Use it for any question about when the sun or moon rises, sets or gets dark; for the sun's angle at a given moment use get_solar_position, and for tides alongside the sun use get_tide_window. Pass elevation whenever you know it: it shifts sunrise and sunset at altitude. Defaults: from today, 7 days or the plan's limit if lower. Requires an API key on a paid Ephemerides plan.
Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.
Endpoints
remote
auth
reachable
uptime 30d
p50
protocol
last ok
https://thirdtrail.life/mcpstreamable-http
api_key ${THIRDTRAIL_TOKEN}
yes
91%
506 ms
2026-07-28, 2025-11-25, 2025-06-18, 2025-03-26
2026-10-19
Tools (8)
get_daily_light_integralread-only
Clear-sky Daily Light Integral in mol/m²/day for each day in a range: photosynthetically active radiation integrated from sunrise to sunset. Use it to plan crop growth or supplemental greenhouse lighting; it assumes cloudless skies, so treat it as the ceiling for the site. Pass from and to together for a range of UTC days, or neither for today. Requires an API key on a paid Solar plan.
get_prayer_timesread-only
Fajr, sunrise, dhuhr, asr, maghrib and isha for one date at a location, elevation-corrected. Use it for Islamic prayer schedules; for general sunrise, sunset and twilight use get_sun_moon_times. school is required and sets the fajr and isha rules; asr_method picks the shadow rule and defaults to shafi. date defaults to today. Requires an API key on a paid Ephemerides plan.
get_solar_pathread-only
The sun's azimuth and altitude through one UTC day, sampled every interval: a list of timestamped positions. Use it for shading studies, PV siting and panel-angle planning; for a single instant use get_solar_position. date defaults to today and interval to 15m. Requires an API key on a paid Solar plan.
get_solar_positionread-only
The sun's position at one instant: azimuth, altitude, zenith, declination, hour angle and equation of time, plus clear-sky irradiance (GHI, DNI and DHI in W/m²) when include asks for it and the plan covers it. Use it for where the sun is at a given moment; for its track through a whole day use get_solar_path, and for rise and set times use get_sun_moon_times. timestamp defaults to now. Positions are NREL SPA-equivalent on JPL DE421; irradiance comes from the Bird clear-sky model. Requires an API key on a paid Solar plan.
get_sun_moon_timesread-only
Sunrise, sunset, solar noon, civil, nautical and astronomical twilight, golden and blue hour, moonrise, moonset and moon phase for a location, one entry per day. Use it for any question about when the sun or moon rises, sets or gets dark; for the sun's angle at a given moment use get_solar_position, and for tides alongside the sun use get_tide_window. Pass elevation whenever you know it: it shifts sunrise and sunset at altitude. Defaults: from today, 7 days or the plan's limit if lower. Requires an API key on a paid Ephemerides plan.
get_tide_extremesread-only
High and low water times and heights at any coastal point, from the FES2022 global tide atlas: a list of events, each with type (high or low), time and height_m. Use it for when high or low tide is; for a continuous curve use get_tide_heights, and for tides together with sunrise, golden hour and moon phase use get_tide_window. Heights are metres relative to MEAN SEA LEVEL, not chart datum — never use for navigation. Defaults: from today, 2 days or the plan's limit if lower. Requires an API key on a paid Tides plan.
get_tide_heightsread-only
Water height at a coastal point at a fixed step: a list of time and height_m pairs. Use it to plot a tide curve or read the height at a particular time; for just the highs and lows use get_tide_extremes. Metres relative to mean sea level, not chart datum. Defaults: from today, 2 days, and the finest step the plan allows, but no finer than 10m. Requires an API key on a paid Tides plan.
get_tide_windowread-only
Per day: high and low waters together with sunrise, sunset, golden and blue hour, twilight and moon phase in a single call. The planning tool for coastal photography, fishing and shore work; use it instead of calling get_tide_extremes and get_sun_moon_times separately. Pass elevation when you know it: it shifts the sun and moon times — roughly three minutes at clifftop height — but never the tide heights, which do not depend on where the observer stands. Defaults: from today, 2 days or the plan's limit if lower. Requires an API key on a paid Tides plan.
Read-only astronomy calculations: sun, moon, planets, eclipses, twilight and star positions.
Official server.json
{
"name": "io.github.thirdtrail/thirdtrail",
"$schema": "https://static.modelcontextprotocol.io/schemas/2025-09-29/server.schema.json",
"remotes": [
{
"url": "https://thirdtrail.life/mcp",
"type": "streamable-http",
"headers": [
{
"name": "Authorization",
"isSecret": true,
"isRequired": true,
"description": "Your thirdtrail API key as 'Bearer tt_live_…'. Mint one at https://thirdtrail.life/apis/keys/. The MCP server requires a paid plan; the REST API has a free tier."
}
]
}
],
"version": "1.0.0",
"repository": {
"url": "https://github.com/thirdtrail/thirdtrail-python",
"source": "github"
},
"websiteUrl": "https://thirdtrail.life/docs/mcp/",
"description": "Elevation-corrected sun, moon, twilight, solar and tide data for any point on Earth"
}