Currently, the response to a rate-limited request only includes the following not-so-useful information in the response body:

{"message": "You have fired too many requests, please wait one minute."}

This isn't particularly useful when trying to design responsible request back-off methods.

Most APIs include Retry-After in the response header, allowing for code to read this value and respond appropriately, rather than guessing a back-off time. I would suggest that the Helpjuice API implement this as well.

HTTP 429 doc: