The MYP API allows a maximum of 5,000 requests per 24 hour rolling period. This is defined on a per-organisation basis.
To prevent a user from sending too many requests at once, there is also a limit of 100 requests per minute for each IP address. If the rate limit is reached, the user must wait for a minute until they can send another request.
NB: If either a quota or rate limit are reached, the user will receive a 403 (Unauthorised Request) response code and an error message detailing whether they have reached a quota limit or a rate limit.