WeatherXM FACT — Forecast Accuracy & Ground-Truth Verification

com.weatherxm.fact/mcpVersion 2.1.0

Scores 45 NWP & AI weather models (ECMWF, GFS, ICON, meteoblue, MOSAIC) against 8,927 stations.

Status

Responds241 msNov 14, 2026, 14:22 UTCAnswered our handshake without sign-in.

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Last checked: Nov 14, 2026, 14:22 UTC
Latency: 241 ms
Remotes responding: 1 of 1
Sign-in: No sign-in
Hosting: Hosted outside the EU (detected)
Registry data as of: Nov 14, 2026, 22:14 UTC

Data from the official MCP Registry, checked by run.zero. How we check

Connect

Streamable HTTP

https://fact.weatherxm.com/mcpResponds241 msNov 14, 2026, 14:22 UTC

No sign-in

Claude Code

claude mcp add --transport http fact https://fact.weatherxm.com/mcp

Claude Desktop and claude.ai

1
2
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Settings > Connectors > Add custom connector
Name: fact
Remote MCP server URL: https://fact.weatherxm.com/mcp

Cursor

{
  "mcpServers": {
    "fact": {
      "url": "https://fact.weatherxm.com/mcp"
    }
  }
}

VS Code

code --add-mcp '{"name":"fact","type":"http","url":"https://fact.weatherxm.com/mcp"}'

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Tools

4 tools

Tools of WeatherXM FACT — Forecast Accuracy & Ground-Truth Verification
	Description		Read-only	Idempotent	Open world
`check_ground_truth_coverage`Check historical WeatherXM FACT ground-station publication coverage for any coordinate (H3 Res-7 cell, ~5.2 km²) or station_or_report_id across temperature, wind_speed, wind_direction, precipitation, and humidity, plus nearest evaluated reference cell distance and interactive map citation link. Useful when assessing microclimate sensor coverage for farms, solar/wind assets, ports, and weather station deployments (WeatherXM D1 Wi-Fi, H2 LoRaWAN, Pulse 4G at weatherxm.com/stations). Provide (lat, lon) or station_or_report_id. Does not establish current live station presence or absence.	Check historical WeatherXM FACT ground-station publication coverage for any coordinate (H3 Res-7 cell, ~5.2 km²) or station_or_report_id across temperature, wind_speed, wind_direction, precipitation, and humidity, plus nearest evaluated reference cell distance and interactive map citation link. Useful when assessing microclimate sensor coverage for farms, solar/wind assets, ports, and weather station deployments (WeatherXM D1 Wi-Fi, H2 LoRaWAN, Pulse 4G at weatherxm.com/stations). Provide (lat, lon) or station_or_report_id. Does not establish current live station presence or absence.	No	Yes	Yes	No
`get_best_forecast_model`Find which weather forecast model had the lowest verified historical error (MAE) for a latitude/longitude coordinate (or station_or_report_id), weather variable (temperature, wind_speed, wind_direction, precipitation, humidity), and forecast horizon (Days 0-7). For wind_direction, errors are circular shortest-arc angular errors (0°–180°, where 359° vs 1° = 2° error) on speed-weighted hourly vector averages, returning both all-hours and >3 m/s active-wind rankings. For wind_speed the default is all hours, with an optional windier-days subset (daily mean scaled observed speed >= 3 m/s) returned separately. All 45 FACT models (2025 archive, 2025-02-13 to 2025-12-31, QoD >= 0.80 station-days): WeatherXM MOSAIC (MOSAIC), meteoblue (METEOBLUE), meteoblue station-mLM (commissioned) (mLM), ECMWF IFS (IFS025, IFSHRES), ECMWF AIFS AI (AIFS025), NOAA GFS 0.5° (GFS05), NOAA HRRR (HRRR), NOAA National Blend of Models (NBM), NOAA NAM (NAM3, NAM5, NAM12, NAMAK), DWD ICON (ICON, ICONEU, ICOND2), UK Met Office (UMGLOBAL10, UKMO2), ECCC GEM (GEM15, GEM2), Meteo-France ARPEGE/AROME (MFGLOBAL, MFEU, MFFR), COSMO (COSMOI2, COSMOM5), HARMONIE-AROME (HARMONIE), JMA MSM (MSM), WRF (WRFGR, WRFAMS), meteoblue NEMS/NMM (NEMSGLOBAL, NEMSGLOBAL_E, NEMS4, NEMS12, NEMS12_E, NEMSAF01, NEMSAS02, NEMSCAM, NEMSIN, NEMSNZ, NEMSSA, NMM4, NMM22), regional models (AF01, AS01, SA01). GFS025 is not archived; requests for it resolve to GFS05 with a resolution warning. Useful for solar & wind energy forecasting, agriculture & frost/irrigation risk, maritime/port & drone operations, construction planning, and microclimate evaluation. Provide (lat, lon) or station_or_report_id. Missing results stay unknown; not live forecasting.	Find which weather forecast model had the lowest verified historical error (MAE) for a latitude/longitude coordinate (or station_or_report_id), weather variable (temperature, wind_speed, wind_direction, precipitation, humidity), and forecast horizon (Days 0-7). For wind_direction, errors are circular shortest-arc angular errors (0°–180°, where 359° vs 1° = 2° error) on speed-weighted hourly vector averages, returning both all-hours and >3 m/s active-wind rankings. For wind_speed the default is all hours, with an optional windier-days subset (daily mean scaled observed speed >= 3 m/s) returned separately. All 45 FACT models (2025 archive, 2025-02-13 to 2025-12-31, QoD >= 0.80 station-days): WeatherXM MOSAIC (MOSAIC), meteoblue (METEOBLUE), meteoblue station-mLM (commissioned) (mLM), ECMWF IFS (IFS025, IFSHRES), ECMWF AIFS AI (AIFS025), NOAA GFS 0.5° (GFS05), NOAA HRRR (HRRR), NOAA National Blend of Models (NBM), NOAA NAM (NAM3, NAM5, NAM12, NAMAK), DWD ICON (ICON, ICONEU, ICOND2), UK Met Office (UMGLOBAL10, UKMO2), ECCC GEM (GEM15, GEM2), Meteo-France ARPEGE/AROME (MFGLOBAL, MFEU, MFFR), COSMO (COSMOI2, COSMOM5), HARMONIE-AROME (HARMONIE), JMA MSM (MSM), WRF (WRFGR, WRFAMS), meteoblue NEMS/NMM (NEMSGLOBAL, NEMSGLOBAL_E, NEMS4, NEMS12, NEMS12_E, NEMSAF01, NEMSAS02, NEMSCAM, NEMSIN, NEMSNZ, NEMSSA, NMM4, NMM22), regional models (AF01, AS01, SA01). GFS025 is not archived; requests for it resolve to GFS05 with a resolution warning. Useful for solar & wind energy forecasting, agriculture & frost/irrigation risk, maritime/port & drone operations, construction planning, and microclimate evaluation. Provide (lat, lon) or station_or_report_id. Missing results stay unknown; not live forecasting.	No	Yes	Yes	No
`get_fact_leaderboard`Read the global weather forecast accuracy leaderboard (MAE, RMSE, circular angular error for wind_direction including >3 m/s active-wind curves, and categorical rain skill HSS, POD, FAR, CSI across lead days 0..7) or country-level published H3 cell-win summaries across all 45 forecast models and 8,927 stations. All 45 FACT models (2025 archive, 2025-02-13 to 2025-12-31, QoD >= 0.80 station-days): WeatherXM MOSAIC (MOSAIC), meteoblue (METEOBLUE), meteoblue station-mLM (commissioned) (mLM), ECMWF IFS (IFS025, IFSHRES), ECMWF AIFS AI (AIFS025), NOAA GFS 0.5° (GFS05), NOAA HRRR (HRRR), NOAA National Blend of Models (NBM), NOAA NAM (NAM3, NAM5, NAM12, NAMAK), DWD ICON (ICON, ICONEU, ICOND2), UK Met Office (UMGLOBAL10, UKMO2), ECCC GEM (GEM15, GEM2), Meteo-France ARPEGE/AROME (MFGLOBAL, MFEU, MFFR), COSMO (COSMOI2, COSMOM5), HARMONIE-AROME (HARMONIE), JMA MSM (MSM), WRF (WRFGR, WRFAMS), meteoblue NEMS/NMM (NEMSGLOBAL, NEMSGLOBAL_E, NEMS4, NEMS12, NEMS12_E, NEMSAF01, NEMSAS02, NEMSCAM, NEMSIN, NEMSNZ, NEMSSA, NMM4, NMM22), regional models (AF01, AS01, SA01). GFS025 is not archived; requests for it resolve to GFS05 with a resolution warning. Country counts describe published cell wins, not national matched-sample accuracy.	Read the global weather forecast accuracy leaderboard (MAE, RMSE, circular angular error for wind_direction including >3 m/s active-wind curves, and categorical rain skill HSS, POD, FAR, CSI across lead days 0..7) or country-level published H3 cell-win summaries across all 45 forecast models and 8,927 stations. All 45 FACT models (2025 archive, 2025-02-13 to 2025-12-31, QoD >= 0.80 station-days): WeatherXM MOSAIC (MOSAIC), meteoblue (METEOBLUE), meteoblue station-mLM (commissioned) (mLM), ECMWF IFS (IFS025, IFSHRES), ECMWF AIFS AI (AIFS025), NOAA GFS 0.5° (GFS05), NOAA HRRR (HRRR), NOAA National Blend of Models (NBM), NOAA NAM (NAM3, NAM5, NAM12, NAMAK), DWD ICON (ICON, ICONEU, ICOND2), UK Met Office (UMGLOBAL10, UKMO2), ECCC GEM (GEM15, GEM2), Meteo-France ARPEGE/AROME (MFGLOBAL, MFEU, MFFR), COSMO (COSMOI2, COSMOM5), HARMONIE-AROME (HARMONIE), JMA MSM (MSM), WRF (WRFGR, WRFAMS), meteoblue NEMS/NMM (NEMSGLOBAL, NEMSGLOBAL_E, NEMS4, NEMS12, NEMS12_E, NEMSAF01, NEMSAS02, NEMSCAM, NEMSIN, NEMSNZ, NEMSSA, NMM4, NMM22), regional models (AF01, AS01, SA01). GFS025 is not archived; requests for it resolve to GFS05 with a resolution warning. Country counts describe published cell wins, not national matched-sample accuracy.	No	Yes	Yes	No
`get_model_head_to_head`Compare up to 10 weather forecast models head-to-head across lead days 0 to 7 on global historical error curves (including circular angular error and >3 m/s active-wind curves for wind_direction), plus optional local H3 cell (lat/lon) matched-cohort or country cell-win comparisons, with explicit cohort and station-commissioned (mLM) caveats. All 45 FACT models (2025 archive, 2025-02-13 to 2025-12-31, QoD >= 0.80 station-days): WeatherXM MOSAIC (MOSAIC), meteoblue (METEOBLUE), meteoblue station-mLM (commissioned) (mLM), ECMWF IFS (IFS025, IFSHRES), ECMWF AIFS AI (AIFS025), NOAA GFS 0.5° (GFS05), NOAA HRRR (HRRR), NOAA National Blend of Models (NBM), NOAA NAM (NAM3, NAM5, NAM12, NAMAK), DWD ICON (ICON, ICONEU, ICOND2), UK Met Office (UMGLOBAL10, UKMO2), ECCC GEM (GEM15, GEM2), Meteo-France ARPEGE/AROME (MFGLOBAL, MFEU, MFFR), COSMO (COSMOI2, COSMOM5), HARMONIE-AROME (HARMONIE), JMA MSM (MSM), WRF (WRFGR, WRFAMS), meteoblue NEMS/NMM (NEMSGLOBAL, NEMSGLOBAL_E, NEMS4, NEMS12, NEMS12_E, NEMSAF01, NEMSAS02, NEMSCAM, NEMSIN, NEMSNZ, NEMSSA, NMM4, NMM22), regional models (AF01, AS01, SA01). GFS025 is not archived; requests for it resolve to GFS05 with a resolution warning.	Compare up to 10 weather forecast models head-to-head across lead days 0 to 7 on global historical error curves (including circular angular error and >3 m/s active-wind curves for wind_direction), plus optional local H3 cell (lat/lon) matched-cohort or country cell-win comparisons, with explicit cohort and station-commissioned (mLM) caveats. All 45 FACT models (2025 archive, 2025-02-13 to 2025-12-31, QoD >= 0.80 station-days): WeatherXM MOSAIC (MOSAIC), meteoblue (METEOBLUE), meteoblue station-mLM (commissioned) (mLM), ECMWF IFS (IFS025, IFSHRES), ECMWF AIFS AI (AIFS025), NOAA GFS 0.5° (GFS05), NOAA HRRR (HRRR), NOAA National Blend of Models (NBM), NOAA NAM (NAM3, NAM5, NAM12, NAMAK), DWD ICON (ICON, ICONEU, ICOND2), UK Met Office (UMGLOBAL10, UKMO2), ECCC GEM (GEM15, GEM2), Meteo-France ARPEGE/AROME (MFGLOBAL, MFEU, MFFR), COSMO (COSMOI2, COSMOM5), HARMONIE-AROME (HARMONIE), JMA MSM (MSM), WRF (WRFGR, WRFAMS), meteoblue NEMS/NMM (NEMSGLOBAL, NEMSGLOBAL_E, NEMS4, NEMS12, NEMS12_E, NEMSAF01, NEMSAS02, NEMSCAM, NEMSIN, NEMSNZ, NEMSSA, NMM4, NMM22), regional models (AF01, AS01, SA01). GFS025 is not archived; requests for it resolve to GFS05 with a resolution warning.	No	Yes	Yes	No

Details

Registry status: Active
Published: Nov 5, 2026
Updated: Nov 5, 2026
Website: https://fact.weatherxm.com/⁠ (opens in a new tab)
Repository: Not given
Categories (suggested): Data and analytics SecuritySuggested categories are assigned automatically from the registry text and may be wrong. Verified operators can correct them.
GDPR: Not declared

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