# Provenance stamped 2026-10-07 (roadmap#943): written by an API Evangelist sweep (undated — the file carries no date and git cannot supply one), not # harvested from the provider. `method: generated` so the economics campaign may replace it with a # dated, verbatim transcription; every figure below is unverified until it does. # Coverage demoted 2026-10-07 (roadmap#942, PLAN.md Stage A): this file was written by an API Evangelist # sweep and names no billing unit, meters or pricing category read from the provider — it restates the # FinOps framework. It is `x-coverage: unmeasured`, and the FOCUS alignment it claimed has been removed. x-coverage: unmeasured method: generated finops: model: Free / Open Public Good description: >- WMO API services are provided as a public good by the World Meteorological Organization, a specialized agency of the United Nations, funded through assessed contributions from its 193 member states and territories. All documented public APIs are available at no cost to users. WMO operates under a policy of open data exchange among member nations and promotes free access to meteorological and hydrological data as foundational infrastructure for weather, climate, and water services globally. pricing: - api: world-weather-information-service-api cost: Free notes: >- No API key required. Attribution to WMO WWIS required per usage terms. Contact webmaster@worldweather.org for commercial or high-volume use. - api: oscar-surface-api cost: Free notes: >- Public GET endpoints are free with no registration. Write access requires a WIGOS Focal Point account, which is issued by WMO to authorized national meteorological services at no charge. - api: wis2-global-discovery-catalogue-api cost: Free notes: >- Fully open, no authentication required. Operated as global WMO infrastructure. Bulk archive downloads available for cost-efficient full-catalogue access. - api: wis2-global-broker-mqtt-api cost: Free notes: >- Public read access via shared credentials. No account required. WMO Resolution 1 mandates that core weather data be freely exchanged among member states as a public service obligation. - api: whos-hydrological-api cost: Free (registration required) notes: >- Free personal token issued upon registration at the WHOS portal. No subscription fee. Operated by GEODAB on behalf of WMO. openDataPolicy: url: https://wmo.int/activities/type-of-activity/exchange-data description: >- WMO Resolution 40 and Resolution 60 establish the principle of free and unrestricted international exchange of meteorological and hydrological data. WIS 2.0 (operational January 2025) codifies open data exchange as core WMO policy, with core weather data mandated to be freely accessible globally under WMO Resolution 1 (Cg-19, 2023).