I have been with you for a very long time,until I recently realized how tricky the edge cases are, I cannot figure out a good rule. A json api, should it use s

I have been with you for a very long time,until I recently realized how tricky the edge cases are, I cannot figure out a good rule. A json api, should it use symbols or strings? Json has string keys, but the api keys are chosen by the programmer. I can't remember which edgecase,but there are another bunch I found that are tricky.