WeatherXM FACT — Forecast Accuracy & Ground-Truth Verification

Overview

WeatherXM FACT is a Model Context Protocol server that evaluates the accuracy of 45 numerical weather prediction and AI models—including ECMWF, GFS, ICON, meteoblue, and MOSAIC—against observations from 8,927 ground stations worldwide. AI assistants and agents connected via MCP can call FACT's tools to access real-time forecast verification data and scoring metrics.

The server runs as a hosted remote service at https://fact.weatherxm.com/mcp with no local installation or authentication required. Version v2.1.0 is the current release. Simply point your MCP client to the endpoint and begin querying forecast accuracy information.

WeatherXM FACT is categorized as an AI & Agents tool on mcp.site and integrates with all MCP clients including Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, Zed, and others. Maintainers are welcome to claim this listing to verify ownership and keep information up to date.

Installation

Settings → Connectors → Add custom connector
Name: WeatherXM FACT — Forecast Accuracy & Ground-Truth Verification
URL:  https://fact.weatherxm.com/mcp