Drupal 8 update discusses the latest beta release of Drupal 8 (8.0.0-beta2) which has 128 release blockers, with 1 in 3 being new since the previous beta.
Drupal services discusses using Drupal as a headless CMS with RESTful APIs and serialization modules to expose entities and resources via JSON and XML formats like HAL.
The REST module enables CRUD operations on node entities and supports authentication and HAL/JSON formats via configuration in rest.settings.yml. The REST UI module provides an interface for configuring resources, formats and authentication for REST services.
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