Help validating Headers of an API

Job ID: 34638632

Budget: $10 – $30 USD

Looking for an experienced API developer
The API is developed in Java 11, Reactive Programming (webflux)
I need to validate the headers to finish it
This is a bit new to me. For security reasons I can not send code to you but we can connect to a zoom call.
Also I need to test the API with JUnit 5 :)
Please say "Hola Diego" to know you read all the description.