As noted here, there is a rate limit of 2000 calls per hour for each organization token.
If you are curious about how close you are to this rate limit for your organzation, you can simply run any REST call to the Inform API (such as a Summary call or User Profile call) in Postman.
Once you have done this, change the results of the call from “Body” to “Headers”. There you will see two values (among others):
X-RateLimit-Limit - The rate limit set for your org token
X-RateLimit_Remaining - The number of calls remaining until the limit resets at the top of the hour