https://techcrunch.com/2020/04/29/apple-and-google-release-first-seed-of-covid-19-exposure-notification-api-for-contact-tracing-app-developers/

Apple and Google have released the very first version of their exposure notification API, which they previously called the contact tracing API . This is a developer-focused release, and is a seed of the API in development with the primary intent of collecting feedback from developers who will be using the API to create new contract tracing and notification apps on behalf of public health agencies.

Last week, Apple CEO Tim Cook told EU Commissioner Thierry Breton that the API would be arriving shortly, and this version is indeed now available – albeit to a specific and limited group that includes select developers working on behalf of public health authorities globally, according to the companies. This is a test release that’s intended to provide the opportunity for development and feedback in advance of the API’s public release in mid-May, at which time developers will be able to use the software feature on devices with publicly available apps released through the iOS and Google software stores, respectively.