Each REST API request must contain identification and authorization parameters.
Some REST APIs may function without these authorization parameters, however, when that occurs, these calls are treated as client-side calls and all client-side rate limits will apply. In order to not reach client-side rate limits that may impact your implementation when using server-to-server REST calls, it is Recommended Best Practice to always sign the request or use a secret. A non-exhaustive list of REST APIs that this may apply to are as follows:
Please refer to the Authorization Parameters section for details.