Jsonapi4j
Skill MoonWorm/jsonapi4j/claude-code-plugin/skills/jsonapi4j
Lightweight Java framework for building REST APIs compliant with the JSON:API specificationFrom the repository description
npx -y skills add MoonWorm/jsonapi4j --skill jsonapi4jAssembled from the repository path, not quoted from the project. Check it against their README if it does not work.