I quickly looked at it and "don't use envelopes by default", "paginate using Link headers" contradict what http://jsonapi.org/ http://jsonapi.org/ specificatio

I quickly looked at it and "don't use envelopes by default", "paginate using Link headers" contradict what http://jsonapi.org/ http://jsonapi.org/ specification says. json:api might not be the best standard and there might be better ones but using something that has many implementations in different languages is better that rolling your own.