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Thirdtrail MCP server

online · 100% uptime
by thirdtrail·io.github.thirdtrail/thirdtrail·v1.0.0
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Elevation-corrected sun, moon, twilight, solar and tide data for any point on Earth

A85/100grade A
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A85/100

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Thirdtrail tools (8)

write = sends, deletes, buys or posts
  • get_daily_light_integralFree

    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_timesFree

    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_pathFree

    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_positionFree

    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_timesFree

    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_extremesFree

    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_heightsFree

    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_windowFree

    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.

Public scan report

scanner v0.1.10 · 2026-11-03 · same rubric, same numbers if you re-run it

no findings
  • –Code scanremote-only server, no package to scann/a
  • Live reliabilityremote reachable in 1695ms20/20
  • Tool poisoning8 tool descriptions checked15/15
  • Auth qualityAPI key sent as a header8/15
  • Maintenancelast push 16 days ago15/15
  • Maintainer identityregistry namespace matches repository owner6/10
Overall 85/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Thirdtrail compares

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
85/100
higher than 70% of 48,255 servers
Tools
8
the typical server has 7
Tools that change things
0%
typical: 0%. Fewer write tools means less an agent can break
Uptime
100%
of our recent checks; the typical remote server answers 100%
Response time
76 ms
faster than 88% of 30,031 servers

What its tools let an agent do: 8 read

Install Thirdtrail in Claude Code, Cursor or VS Code

claude mcp add --transport http thirdtrail https://thirdtrail.life/mcp
Add to Cursor

What the publisher says

From the Thirdtrail repository's README, as published. We do not edit it. Read it on GitHub

thirdtrail

Python client for the thirdtrail APIs — sun, moon, twilight, solar irradiance and tides for any point on Earth, with elevation as a first-class input.

pip install thirdtrail
from thirdtrail import Client

tt = Client(api_key="tt_live_…")

for day in tt.ephemerides(lat=53.3498, lon=-6.2603, elevation=20):
    print(day.date, day.sun.rise, day.sun.set)

Why elevation

Most sunrise APIs answer for an observer standing at sea level. The higher you are, the further you see, and the earlier the sun clears the horizon.

At the Cliffs of Moher (214 m) the difference is about three minutes — on sunrise, sunset, and every golden- and blue-hour boundary with them:

Golden hour lasts 20–40 minutes, so three minutes is a real slice of it. Pass elevation whenever you know it.

What you get

day.sun.rise                        # datetime, with its timezone offset intact
day.sun.golden_hour.morning.start
day.moon.phase.name                 # "Waxing Gibbous"
day.moon.phase.illumination         # 0.7376

Timestamps arrive as aware datetime objects, not strings. Anything the client does not model is still there on day.raw and day.response, so a new server-side field never has to wait for a client release.

Endpoints

tt.ephemerides(lat=…, lon=…, elevation=…, days=7)     # sun + moon + twilight
tt.prayer_times(lat=…, lon=…, school="mwl")           # five daily prayers
tt.solar(lat=…, lon=…, timestamp=…)                   # position + irradiance
tt.solar_path(lat=…, lon=…, interval="5m")            # the sun's arc, sampled
tt.solar_dli(lat=…, lon=…, from_date=…, to_date=…)    # Daily Light Integral
tt.tide_heights(lat=…, lon=…, step="10m")             # water height series
tt.tide_extremes(lat=…, lon=…)                        # high and low waters
tt.tide_window(lat=…, lon=…, elevation=…)             # tides + sun + moon
tt.tide_constituents(lat=…, lon=…)                    # harmonic constants

Tides take no elevation — except one

tideheights and tideextremes have no elevation parameter, and that is deliberate: how high you stand does not change the ocean surface. Passing it raises TypeError rather than being silently ignored.

tide_window is the exception, because half of what it returns is sun and moon data:

for day in tt.tide_window(lat=52.9715, lon=-9.4309, elevation=214, days=3):
    print(day.date, day.sun.golden_hour.morning.start)
    for t in day.low_waters:
        print("  low water", t.time, t.height_m)

Tide heights are metres relative to mean sea level, not chart datum, and exclude weather-driven surge. Not for navigation.

Errors

Catch a type, not a sentence:

from thirdtrail import PlanLimitExceeded

try:
    tt.tide_extremes(lat=51.5, lon=-2.7, days=90)
except PlanLimitExceeded as e:
    tt.tide_extremes(lat=51.5, lon=-2.7, days=e.limit)   # e.limit == 31

AuthenticationError (401), PermissionDenied (403, a tier you are not on), PlanLimitExceeded and InvalidRequest (400), RateLimited (429), DataUnavailable (503), ServerError (5xx). All subclass ThirdtrailError.

Transient failures and 429s are retried with backoff. A plan ceiling is not — it will fail identically every time.

Keys

Mint one at thirdtrail.life/apis/keys/. A key belongs to one subscription, so it works with one API; a Tides key calling a solar endpoint gets PermissionDenied.

There is a free tier on every API.

Not covered yet

Bulk (POST) endpoints, iCalendar feeds and webhook management. Use the REST API directly for those — the full contract is published as OpenAPI 3.1.

Shortened. The full README is on GitHub.

Nothing above is checked by us. What we check is on the safety report.

Grade history

  • 2026-11-03restoreB → Ascore 85

Thirdtrail: common questions

Is Thirdtrail MCP server safe?
Yes, by our scan: it is graded A (85/100). Read the Thirdtrail safety report
How do I install Thirdtrail?
It runs remotely at thirdtrail.life. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.
Does Thirdtrail need an API key?
Yes. The registry entry asks for Authorization.
Is Thirdtrail maintained?
The last commit was 18 days ago (2026-10-17). The latest release is v1.0.0.
Is Thirdtrail up?
100% of our last 28 checks got an answer. We check remote servers about four times a day.
How does Thirdtrail compare with other MCP servers?
safety score 85/100 (higher than 70% of 48,255 servers); tools 8 (the typical server has 7); tools that change things 0% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.