RESTful API - Correct behaviour when spurious/not requested parameters are passed in the request

Question

We are developing a RESTful api that accepts query parameters in the request in the form of JSON encoded data.

We were wondering what is the correct behaviour when <

Answer 1

I will suggest that you ignore the extra parameters. Reusing API is a game changer in the integration world. What if the same API can be used by other integration but with slightly extra parameters?

Application A expecting:

{
    "name": "Jeff",
    "surname": "Atwood"
}

Application B expecting:

{
    "name": "Jeff",
    "surname": "Atwood",
    "color": "red"
}

Simple get application application A to ignore "color" will do the job rather to have 2 different API to handle that.