In which cases is using REST API not recommended?

REST API is not recommended to be used in the following cases:

• When support for complex transactions or operations with a high degree of consistency is required, as REST does not provide built-in support for ACID.
• For applications with intensive real-time data exchange, where WebSocket or gRPC are more suitable.
• If high performance and minimal latency are necessary, for example, in microservices with internal interactions, where binary protocols are preferred.
• When the API needs to support complex queries with multiple filters and relationships, where GraphQL might be more convenient.

In such cases, alternative architectural approaches should be considered.