JSON:API
If you’ve ever argued with your team about the way your JSON responses should be formatted, JSON:API can help you stop the bikeshedding and focus on what matters: your application.
By following shared conventions, you can increase productivity, take advantage of generalized tooling and best practices. Clients built around JSON:API are able to take advantage of its features around efficiently caching responses, sometimes eliminating network requests entirely.
Source: JSON:API — A specification for building APIs in JSON.