mcp · Global

groundcheck

Live ground-level weather from radiosonde balloons worldwide: map, weather app, forecast, public API and Firefox add-on

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Data offered docs-verified: ground-level temperature · humidity · pressure · nearest-station reading · station history · in-flight balloon banner
Coverage docs-verified: Worldwide · History views span 7 days to all-time
Update frequency docs-verified: Self-hosted collector can run every minute, daily or on a custom cron interval (hosted update rate not stated)
Formats docs-verified: JSON · MCP stdio
Access docs-verified: Free to use; AGPL-3.0 licence. No key needed for the default rate limit (30 req/60s); a free key from POST /api/keys/new raises it to 13000 req/10s

Use cases llm-inferred: Measured surface temperature, humidity and pressure as context for site weather in consultancy reports · Historical station readings over 7 days to all-time to support site-period weather records · Cross-check of model or forecast surface conditions against live sensor measurements
Audience llm-inferred: environmental consultants · geotechnical engineers · GIS analysts · hydrologists

Constraints llm-inferred: Ground-level readings only; upper-air balloon data is not shown · Measured observations, not a forecast; the 'Next hours' panel uses a 7-day historical diurnal pattern · Sparse coverage: few launches per day and gaps of several hours between readings · Depends on third-party telemetry (sonde.mine.nu, zeesen.mine.nu, SondeHub) · No UK-specific coverage or resolution stated in the docs · AGPL-3.0: a modified version served over a network must offer its source · Catalogue metadata lists tool 'index.html' and API-key auth; docs list the MCP tools below and say a key is optional

Auto-extracted, unverified fields: tools, auth. Check upstream documentation.

Daily discovery 2026-10-16: GitHub search; verified via GitHub API. Tools/install/auth auto-extracted from README.

Metadata observed 14/10/2026 · daily-2026-10-16 (github-search)