Salesforce applies limits to the total number of API Requests processed per day. REST API, SOAP API, Bulk API and Bulk API 2.0 calls all contribute to consumption of this limit which is typically defined by your Salesforce edition - outlined here.
The Signature Success plan's Proactive Monitoring product will monitor for, and alert you to, high consumption against this limit. This article outlines some scenarios to help you investigate should you receive an alert. In addition, on the Salesforce Help site Designated contacts and above can see your realtime metrics, alerts & more.
If you receive the following error message, your organization may be unable to process API calls for up to 24 hours.
Full error message text:
REQUEST_LIMIT_EXCEEDED
Some common causes for high limit usage, or limit exhaustion, are:
Here are a few suggestions and resources that may help to resolve or mitigate high limit usage:
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