Is GET idempotent? Can there be a situation where it is not?

The HTTP GET method is considered idempotent because repeated requests should not change the server's state and should produce the same result.

However, in practice, the situation can differ:

• If the server implements GET with side effects (for example, logging, increasing view counters), then GET ceases to be purely idempotent.
• Caching and intermediate proxies can influence the perception of idempotency.

Idempotency is a property that guarantees that a repeated request will not change the server's state after the first call. GET is supposed to be safe and idempotent by standard, but implementation can violate these principles.