For all types of call to the Smart Gift API the rate limit is 60 requests per half minute.
You will receive the following headers with each request made to the API, the limit and number of request your client has left before the limit is hit.
X-RateLimit-Limit: 60
X-RateLimit-Remaining: 25When the limit is hit you will receive a 429 Too Many Requests http status code, and your requests will fail. You will also receive additional headers with a wait time before you may make another request and that same future time as a unix timestamp.
Retry-After: 30
X-RateLimit-Limit: 60
X-RateLimit-Remaining: 0
X-RateLimit-Reset: 1611079679