Machine-readable climate API discovery

Find climate APIs.

Discover APIs for weather, forecasts, historical climate, environmental observations, air quality and risk-relevant data.

Open structured catalog ARD manifest MCP discovery metadata llms.txt

For agents

ARD: https://climateapis.com/.well-known/ard.json
Catalog: https://climateapis.com/api/catalog.json
LLM overview: https://climateapis.com/llms.txt
Live RWAPIS MCP: https://mcp.realworldapis.com/mcp

The live MCP exposes find_api_for_task for natural-language physical-world API discovery.

Tasks this gateway can help discover

Find APIs for climate and weather data

Find APIs for environmental forecasts, historical climate or risk data

Find an API for air quality and environmental observations

Find agent-ready weather and climate APIs

Audited climate and environmental APIs

Weather and environment records from the RealWorldAPIs audited catalog. Snapshot: 2026-09-16.

70/100

OpenWeather

OpenWeather · Weather

Current, forecast, historical and environmental weather data through developer APIs.

Current weatherForecastsHistorical weatherEnvironmental data

OpenAPI: Yes · Agent actionable: Yes

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70/100

Tomorrow.io Weather API

Tomorrow.io · Weather

Real-time, forecast, historical and event-based weather intelligence for applications and agents.

Real-time weatherForecastsHistorical weatherWeather events

OpenAPI: Yes · Agent actionable: Yes

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70/100

Visual Crossing Weather API

Visual Crossing · Weather

Historical weather, forecasts, timelines and climate data by location.

Weather dataForecastsHistorical data

OpenAPI: Yes · Agent actionable: Yes

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70/100

WeatherAPI.com

WeatherAPI.com · Weather

Current, forecast, historical, marine, astronomy and geolocation weather data.

Current weatherForecastsHistorical weatherMarine

OpenAPI: Yes · Agent actionable: Yes

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50/100

Ambee APIs

Ambee · Environment

Environmental intelligence APIs covering air quality, pollen, weather, wildfire, disasters and geospatial context.

Air qualityWeatherForecastsGeocoding

OpenAPI: Unknown · Agent actionable: Yes

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50/100

Meteomatics Weather API

Meteomatics · Weather

Global weather, climate, ocean and environmental data through a unified API.

Weather dataForecastsHistorical data

OpenAPI: Unknown · Agent actionable: Yes

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45/100

NOAA / National Weather Service API

NOAA / NWS · Weather

Official US forecasts, alerts, observations and weather-office data.

ForecastsAlertsObservations

OpenAPI: Yes · Agent actionable: Yes

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45/100

OpenAQ API

OpenAQ · Environment

Global open air-quality measurements and monitoring-station metadata.

Air qualityMonitoring stations

OpenAPI: Yes · Agent actionable: Yes

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25/100

AirNow API

AirNow · Environment

US air-quality observations, forecasts and reporting-area data.

Air qualityForecastsObservations

OpenAPI: Unknown · Agent actionable: Yes

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25/100

Google Air Quality API

Google · Environment

Current and historical air-quality data, pollutants and health recommendations by location.

Air qualityPollutantsHealth recommendations

OpenAPI: Unknown · Agent actionable: Yes

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25/100

Google Pollen API

Google · Environment

Pollen forecasts and heatmaps with pollen types, plant information and health-oriented indices.

ForecastsHealth recommendationsEnvironmental dataMaps

OpenAPI: Unknown · Agent actionable: Yes

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25/100

Open-Meteo

Open-Meteo · Weather

Open weather forecasts, historical weather, climate, marine and air-quality data.

ForecastsHistorical weatherClimateMarine

OpenAPI: Unknown · Agent actionable: Yes

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25/100

USGS Water Data APIs

USGS · Environment

USGS machine-readable water observations, monitoring-location metadata and time-series measurements.

ObservationsMonitoring stationsHistorical data

OpenAPI: Unknown · Agent actionable: Yes

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