API-based access to millions of geophysical observations

Anyone can get access to up-to-the-minute data from tens of thousands of observing sites, all easily accessible through the Synoptic API (SYNAPI). Using SYNAPI and its toolkit is free - simply become a Registered User and we provide you with a private API key for your use.

Public domain data is immediately available for your use in testing and development. We have a generous free tier of usage, and if your usage grows beyond that, we’ll work with you to set up a subscriber service package customized to meet the growing needs of your users.


  • improved licensing, data rights management,
    and quality control
  • improved data and metadata uploading,
    editing, and viewing
  • sensor network management services
  • collection and management of data user fees
  • support for customized alerting and reporting algorithms
  • observation and sensor assessment

Sign up for the free Synoptic API.

You'll get a private API key and access to the SYNAPI toolkit.

We respect your privacy.