4.screen Mobility Experience Cloud API
The production 4.screen API. Automakers and mobility service providers integrate it into infotainment and navigation systems to render 4.screen content in the vehicle, and the 4.screen customer portal calls the same host for campaign management. The surface is OAuth 2.0 / OpenID Connect protected by a self-hosted Keycloak realm mounted at /auth on the same host, and a GraphQL endpoint is referenced by the portal application at /graphql. No OpenAPI, GraphQL SDL or public reference is published — every anonymous request to api.4screen.com returns HTTP 401 AUTHENTICATION_FAILED.