aid: wmo name: World Meteorological Organization description: >- The World Meteorological Organization (WMO) is a specialized agency of the United Nations that coordinates global meteorological, climatological, hydrological, and related geophysical sciences. WMO provides public REST APIs for weather data, climate observation metadata, hydrological monitoring, severe weather alerts, and the WIS2 global meteorological information exchange system enabling real-time access to earth system data from member nations worldwide. type: Index image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg url: https://raw.githubusercontent.com/api-evangelist/wmo/refs/heads/main/apis.yml created: '2024-01-01' modified: '2026-06-13' specificationVersion: '0.19' tags: - Weather - Climate - Hydrology - Meteorology - International Organization - United Nations - Open Data apis: - aid: wmo:world-weather-information-service-api name: World Weather Information Service API tags: - Weather - Forecasts - Climate humanURL: https://worldweather.wmo.int/en/dataguide.html baseURL: https://worldweather.wmo.int/en/json/ properties: - url: https://worldweather.wmo.int/en/dataguide.html type: Documentation description: >- The WMO World Weather Information Service (WWIS) provides public JSON endpoints delivering official city weather forecasts and climatological data contributed by WMO member national meteorological and hydrological services. Data is freely accessible by city identifier with no authentication required. City forecasts include temperature, wind, humidity, and precipitation; climatological normals cover monthly averages. A full city list with identifiers is available for programmatic enumeration of supported locations. - aid: wmo:oscar-surface-api name: OSCAR/Surface REST API tags: - Observations - Weather Stations - WIGOS - Metadata humanURL: https://oscar.wmo.int/surface/ baseURL: https://oscar.wmo.int/surface/rest/api properties: - url: https://oscar.wmo.int/surface/ type: Documentation - url: https://oscar.wmo.int/surface/rest/api?_wadl type: WADL description: >- The OSCAR/Surface REST API provides programmatic access to the WMO Observing Systems Capability Analysis and Review tool for surface-based stations. The public GET endpoints enable search and retrieval of station metadata records in JSON format covering WIGOS station identifiers, station locations, observation variables, and operational status. The search station endpoint supports pagination with up to 50,000 station records per query. Authentication tokens are required for write (POST/XML upload) operations but not for read access. - aid: wmo:wis2-global-discovery-catalogue-api name: WIS2 Global Discovery Catalogue API tags: - WIS2 - Discovery - Metadata - OGC - Catalogue humanURL: https://wis2-gdc.weather.gc.ca baseURL: https://wis2-gdc.weather.gc.ca properties: - url: https://wis2-gdc.weather.gc.ca/collections/wis2-discovery-metadata/items type: Documentation - url: https://wis2-gdc.weather.gc.ca type: OpenAPI - url: https://raw.githubusercontent.com/api-evangelist/wmo/refs/heads/main/openapi/wis2-global-discovery-catalogue-openapi.json type: OpenAPI description: >- The WIS2 Global Discovery Catalogue (GDC) implements the OGC API - Records standard to provide discovery metadata for datasets published across the WMO Information System 2.0 network. The primary hosted instance is operated by the Meteorological Service of Canada (MSC). The API supports free-text search, spatial bounding-box filtering (bbox), temporal filtering (ISO 8601 datetime), and pagination via limit and offset parameters. Records conform to the WMO Core Metadata Profile 2 (WCMP2) standard and are returned in GeoJSON or HTML. WIS2 officially entered operational phase on January 1, 2025. - aid: wmo:wis2-global-broker-mqtt-api name: WIS2 Global Broker (MQTT) tags: - WIS2 - Real-time - MQTT - Pub/Sub - Notifications humanURL: https://community.wmo.int/site/knowledge-hub/programmes-and-initiatives/wmo-information-system-wis/wis2-overview baseURL: mqtts://globalbroker.meteo.fr:8883 properties: - url: https://community.wmo.int/site/knowledge-hub/programmes-and-initiatives/wmo-information-system-wis/wis2-overview type: Documentation - url: https://wmo-im.github.io/wis2-cookbook/cookbook/wis2-cookbook-DRAFT.html type: GettingStarted description: >- The WIS2 Global Broker provides an MQTT(S) publish-subscribe service that re-publishes real-time weather notification messages from all WIS2 Nodes worldwide. Subscribers connect using MQTTS on port 8883 with public read-only credentials (username: everyone, password: everyone). Notification messages include data download links for core weather observations, forecasts, climate data, and alerts exchanged between WMO member nations under the WIS2 topic hierarchy. - aid: wmo:whos-hydrological-api name: WHOS Hydrological Observing System API tags: - Hydrology - Water - Observations - Time Series humanURL: https://community.wmo.int/whos-web-services-and-supported-tools baseURL: https://whos.geodab.eu/gs-service/services/essi properties: - url: https://community.wmo.int/whos-web-services-and-supported-tools type: Documentation description: >- The WMO Hydrological Observing System (WHOS) provides multiple API interfaces for accessing global hydrological station data and time series. Available services include a REST/JSON DAB Observation and Measurement API, an OGC Sensor Observation Service (SOS), CUAHSI WaterML endpoints for compatibility with HydroDesktop and R WaterML libraries, and an ESRI Feature Server. All endpoints require a personal access token obtained via free registration at the WHOS registration portal. Supported views include whos-arctic, whos-plata, and the global whos view. common: - type: Website url: https://wmo.int/ - type: GitHubOrganization url: https://github.com/World-Meteorological-Organization - type: GitHubOrganization url: https://github.com/wmo-im - type: Community url: https://community.wmo.int/ - type: Portal url: https://wmo.int/activities/type-of-activity/exchange-data - type: Documentation url: https://docs.wis2box.wis.wmo.int/en/latest/ - type: SevereWeatherAlerts url: https://severeweather.wmo.int/ - type: Twitter url: https://twitter.com/WMO - type: LinkedIn url: https://www.linkedin.com/company/world-meteorological-organization-wmo/ - type: TermsOfService url: https://worldweather.wmo.int/en/dataguide.html maintainers: - FN: Kin Lane email: kin@apievangelist.com