The Intervals API includes the following rate limits.
All Plans (Except Unlimited):
100 requests per minute per IP
6000 requests per day per customer account
The Unlimited Plan:
100 requests per minute per IP
12000 requests per day per customer account
The Unlimited plan increases the API rate limits to 12,000 requests per day. That’s double the limit of other plans. If you are an API power user, the Unlimited plan will give you more flexibility and resources for your custom integration.
More information about the rate limits are available in the introduction section of the API documentation.