Api Rate limit

I want to know what is the API rate limit for dropbox version 5.0.2

The Dropbox API does have a rate limiting system, but we don't have specific rate numbers documented. Apps should be written to handle these rate limit responses automatically. Also note that not all responses with a 429 or 503 status code indicate explicit rate limiting, but in any case that you get a response with 429 or 503 status code the best practice is to retry the request, respecting the Retry-After header if given in the response, or using an exponential back-off, if not.

I recommend referring to the error documentation and Error Handling Guide for more information.