Weather and climate · by NASA Langley Research Center

NASA POWER (Prediction Of Worldwide Energy Resources)

A NASA API and data viewer giving satellite- and model-derived solar radiation and weather for any point on Earth, with 300+ parameters at hourly, daily, monthly and climatology levels, in units tailored for renewable energy, buildings and agriculture.

One key-less GET request returns decades of sunshine and temperature for any coordinate, which is exactly the input a solar-panel or crop model needs.

LiveAPI, no keyDownloadCommercial OK

Open power.larc.nasa.gov ↗ agent.md

For your project

Official API: Official API · Free No published number; the API returns 429 Too Many Requests when overloaded. Request no finer than the native 0.5 x 0.625 degree (meteorology) / 1 x 1 degree (solar) grid
“Full REST API documentation (Swagger/OpenAPI): https://power.larc.nasa.gov/api/pages/” power.larc.nasa.gov/llms.txt
Key: Not needed
“All endpoints are publicly accessible with no authentication.” power.larc.nasa.gov/llms.txt
Formats: JSON, GEOJSON, CSV, ASCII, NETCDF, ICASA
Data download: Yes csv, netcdf, json
“For downloading the monthly temporal level of the POWER Data Archive, it is recommended to use the Registry of Open Data on AWS .” power.larc.nasa.gov/docs/services/
License: CC BY 4.0 POWER data products
Commercial use: Commercial use OK
“License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/)” power.larc.nasa.gov/llms.txt
Credit: Credit required
“When POWER data products are used in a publication include both POWER 's Reference and POWER 's Data Reference in any work product or publication.” power.larc.nasa.gov/docs/referencing/
Embedding: Embedding with conditions
“the Project requests notification if POWER data is transmitted to other researchers.” power.larc.nasa.gov/docs/referencing/
Using the website: Free

Read on NASA POWER (Prediction Of Worldwide Energy Resources)'s own pages on Oct 23, 2026 · license or terms · API docs. Check the license page before you ship.

For your agent

A request your code or agent can make with no key:

https://power.larc.nasa.gov/api/temporal/daily/point?parameters=T2M,ALLSKY_SFC_SW_DWN&community=RE&longitude=13.41&latitude=52.52&start=20240101&end=20240107&format=JSON

Use /api/temporal/{hourly|daily|monthly|climatology}/point with parameters=, community=RE|AG|SB, start/end as YYYYMMDD and format=JSON|CSV|NETCDF; no key, but the latest 2-3 months are provisional and get replaced, and the solar grid is 1 degree so nearby points return the same values.
Credit NASA Langley Research Center's POWER project (CC BY 4.0), including service name, version and access date in publications.
Do not request points finer than the data grid (0.5 x 0.625 degree meteorology, 1 x 1 degree solar); back off on HTTP 429.
Treat the last 2-3 months as provisional; re-fetch later for climate-quality values.

llms.txt: power.larc.nasa.gov/llms.txt

Paste into your agent: Read https://agentgid.com/resources/nasa-power/agent.md before using NASA POWER (Prediction Of Worldwide Energy Resources).

What you can build

A rooftop-solar estimator that takes an address, pulls the climatology of ALLSKY_SFC_SW_DWN for that point and estimates yearly kWh for a given panel size.
A crop-planning helper for smallholder farmers that charts growing degree days and rainfall from the AG community daily data.
A building-energy pre-design tool that computes heating and cooling degree days from POWER's SB community data for any site worldwide.

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