API Design

Question 1

Is HTTP POST request idempotent?

Answer 1

No. It will create a new resource every time it’s executed.

Question 2

Is HTTP PUT request idempotent?

Answer 2

Yes. PUT contains a final representation of the object. Hence, if it is created multiple times the final state will be the same.

Question 3

Is HTTP DELETE request idempotent?

Answer 3

Yes. Issuing it multiple times to delete a resource with a given ID won’t impact the state.