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READY Web API

NOTE: this web server is not maintained in an "operational" environment and should not be relied upon for 24/7 access (see the disclaimer).

Timely delivery of data and products from this server through the Internet is not guaranteed.

The READY Web Application Programming Interface (API) provides web accessible endpoints for obtaining sounding information and running HYSPLIT trajectory. More endpoints for other READY products may be implemented in the future.

To access the API, users must obtain an API key from the HYSPLIT team. NOAA users can request an API key by emailing arl.webmaster@noaa.gov. Non-NOAA users are required to first register with HYSPLIT; for registration details, please refer to the HYSPLIT Registration Instructions page. Once registered, non-NOAA users can request an API key by emailing arl.webmaster@noaa.gov. Approval is subject to the discretion of the HYSPLIT developers.

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Modified: April 23, 2025
US Dept. of Commerce |  NOAA |  NOAA Research |  ARL