Core module that contains base JSON:API classes and interfaces. Can generate JSON:API compliant Java models without bringing any HTTP-layer dependencies

Servlet API framework base. Can be used as is or for integrations with other frameworks e.g.

Access Control Plugin. Can be used for fain-grained access control towards JSON:API operations and data anonymization

JSON:API Sparse Fieldsets plugin. Can be used to return only specific fields in the response on a per-type basis.