Versions

Lists summary information about each Salesforce version currently available, including the version, label, and a link to each version’s root.

URI: /services/data/

Formats: JSON, XML

HTTP Method: GET

Authentication: none

Parameters: none

Version alias: Instead of a numeric version (for example, vXX.X), you can use latest in the URI to resolve to the most recently released API version.

See List Available REST API Versions.