Changelog

2026-09-19

• format=flatbuffers on /v1/forecast: the Open-Meteo SDK binary, so openmeteo-requests and the other official clients work by changing the URL. Forecast errors now carry error: true and reason alongside detail.
• Open-Meteo parameter surface on /v1/forecast: current=, daily=, models=a,b with _model suffixes, timeformat=unixtime, format=csv, forecast_days, forecast_hours, start_hour/end_hour, elevation=, timezone=auto, timezone_abbreviation. Up to 50 locations per request.
• /v1/layers catalogue and /v1/layers/{model}/{var}/tilejson.json TileJSON documents.
• /v1/profile/xsection and /v1/profile/airgram as the canonical profile paths (/v1/xsection, /v1/airgram remain).
• /v1/openapi.json and /llms.txt, public.
• Analysis archive started: every model’s f00/f01 hours are retained for a future history product.

2026-09-18

• Metering and plans. Credits as the unit; free plan (15,000/month, 1,000/day, commercial use) and pay-as-you-go with a spend cap. x-credits-* headers on every response, dry_run=1, GET /v1/usage, public GET /v1/pricing.json. 402 on caps, 429 on bursts, refunds on failed requests.
• Authentication accepts Authorization: Bearer, x-api-key and ?apikey=. Keys now start with vtx_live_.
• api.vertexmaps.com is the API host.

Earlier

The serving plane behind Vertex Maps has run since August 2026: HRRR/NAM/GFS/ECMWF tiles and point forecasts, the soaring set, radar and nowcast, lightning, MADIS stations, soundings, gauges, wildfire, TFRs, NWS discussions and alerts, and the static outdoor layers. RRFS was added in September 2026 ahead of NAM’s retirement on 2026-10-14.