Free Environment APIs

30 free public Environment APIs for developers. 28 support HTTPS, 12 allow CORS from the browser and 15 need no API key.

One account · one API key

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Showing 30 of 30 APIs

AirNow

US EPA air quality data and forecasts

apiKeyHTTPSCORS

BreezoMeter Pollen

Daily Forecast pollen conditions data for a specific location

apiKeyHTTPSCORS ?

Carbon Interface

API to calculate carbon (C02) emissions estimates for common C02 emitting activities

apiKeyHTTPSCORS

Climatiq

Calculate the environmental footprint created by a broad range of emission-generating activities

apiKeyHTTPSCORS

Cloverly

API calculates the impact of common carbon-intensive activities in real time

apiKeyHTTPSCORS ?

CO2 Offset

API calculates and validates the carbon footprint

No authHTTPSCORS ?

Danish data service Energi

Open energy data from Energinet to society

No authHTTPSCORS ?

EIA Open Data

US energy statistics: electricity, petroleum, gas

apiKeyHTTPSCORS ?

GridHub

Live wholesale electricity prices and demand across 25 grid zones

apiKeyHTTPSCORS

GridVigil

Pressure scores, demand, generation mix and alerts for the 10 major U.S. power grids

No authHTTPSCORS

GrünstromIndex

Green Power Index for Germany (Grünstromindex/GSI)

No authNo HTTPSCORS

IQAir

Air quality and weather data

apiKeyHTTPSCORS ?

kanari

Real-time worldwide wildfire detections, water bomber tracking and open fire archive

No authHTTPSCORS

Luchtmeetnet

Predicted and actual air quality components for The Netherlands (RIVM)

No authHTTPSCORS ?

Mycelium

Corporate carbon emissions disclosures (scope 1, 2 and 3), company-reported and estimated

apiKeyHTTPSCORS ?

National Grid ESO

Open data from Great Britain’s Electricity System Operator

No authHTTPSCORS ?

Open-Meteo

Free weather API for non-commercial use

No authHTTPSCORS

OpenAQ

Open air quality data

apiKeyHTTPSCORS ?

PM2.5 Open Data Portal

Open low-cost PM2.5 sensor data

No authHTTPSCORS ?

PM25.in

Air quality of China

apiKeyNo HTTPSCORS ?

PVGIS

EU solar radiation and photovoltaic performance estimates

No authHTTPSNo CORS

PVWatts

Energy production photovoltaic (PV) energy systems

apiKeyHTTPSCORS ?

sensor.community

Community air quality sensor network data worldwide

User-AgentHTTPSCORS

Solematica

Compare Italian solar (photovoltaic) installer offers, energy prices (PUN/ARERA) and satellite roof data

No authHTTPSNo CORS

Srp Energy

Hourly usage energy report for Srp customers

apiKeyHTTPSNo CORS

SustainMetrics

18,000+ GHG emission factors from DEFRA, EPA, ADEME, Ember

apiKeyHTTPSCORS

Sähkön hinta nyt

Finnish and Nordic day-ahead electricity spot prices (15-minute), cheapest hours

No authHTTPSCORS

UK Carbon Intensity

The Official Carbon Intensity API for Great Britain developed by National Grid

No authHTTPSCORS ?

WattFigure

US electricity rates by state, with appliance and EV charging running costs

No authHTTPSCORS

Website Carbon

API to estimate the carbon footprint of loading web pages

No authHTTPSCORS ?

Environment API FAQ

How many free Environment APIs are there?

There are 30 free public Environment APIs in the directory. 28 support HTTPS, 12 are confirmed to allow CORS and 15 need no API key.

Which Environment APIs work without an API key?

15 Environment APIs need no authentication, including CO2 Offset, Danish data service Energi, GridVigil and GrünstromIndex. You can call them straight away without signing up.

Which Environment APIs can I call from the browser?

APIs with CORS enabled can be called directly from front-end JavaScript. In Environment, that includes AirNow, Carbon Interface, Climatiq and GridHub.

Environment API FAQ

How many free Environment APIs are there?

There are 30 free public Environment APIs in the directory. 28 support HTTPS, 12 are confirmed to allow CORS and 15 need no API key.

Which Environment APIs work without an API key?

15 Environment APIs need no authentication, including CO2 Offset, Danish data service Energi, GridVigil and GrünstromIndex. You can call them straight away without signing up.

Which Environment APIs can I call from the browser?

APIs with CORS enabled can be called directly from front-end JavaScript. In Environment, that includes AirNow, Carbon Interface, Climatiq and GridHub.