JSON Schema Information
JSONJSON schema allows checking the validity of JSON objects against a manually specified schema. It can power autocompletion and hover annotations for a wide range of text editors and IDEs.
The JSON Schema Store provides a repository of many pre-made schemas.
The website provides the documentation about the standard.
There are also a couple of websites that provide online editors for those schemas. For example, https://json-schema-editor.tangramjs.com/editor.html.