The Analytics API endpoint allows you to make 250 requests within a 1 minute period, and 1000 requests per day. The Value Report endpoint allows you to make 10 requests within a 1 minute period, and 100 requests per day.
Rate limits for the Analytics API are counted by the total number of components requested per address. For example, if a POST request to the Analytics API includes 3 addresses in the body, it will count as 3 requests against the rate limit.
These limits can be increased for enterprise users. For additional info, please click here.