How to validate if user sends the query parameter which is not defined in the below URL?

[sakticse]

/v1/customer-self-management/crm /billing-accounts?id=1&serviceId=2&lastName=3&personalId=4&accountType=5&status=6

My requirement is, when user sends parameter named "firstname" (that is not defined in the above URL) I should throw an error like "invalid parameter".

[anilsr]

@Sakthivel ,

Welcome to Apigee Community.

It should be simple & straight forward. Use Raise Fault Apigee Policy in Request Proxy Preflow & then execute the policy with policy condition flow variable request.queryparam.firstname is null.

Keep us posted if you have any difficulty while implementing same.

[Former Community Member]

If you want a generic way to prevent "extra" query params from being sent, you might want to look at this article: https://community.apigee.com/questions/12782/how-do-you-iterate-collection-from-requestquerypar.html

This gives you an array of query params you can iterate over. If you find params that you are not looking for, you can raise a fault.