how to display developer details when ever we hit on api it should be display in body

[rohanjangid]

i have an proxy with simply endpoint of https://mocktarget.apigee.net/json and inside this proxy i added a access entity policy and inside this policy I got developer mail id and extract developer email id in a email variable

now i want my this email-id should be visible in a body whenever we hit on api

here is my code that i wrote in a assign message policy

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<AssignMessage async="false" continueOnError="false" enabled="true" name="EchoVariables">
    <DisplayName>EchoVariables</DisplayName>
    <IgnoreUnresolvedVariables>true</IgnoreUnresolvedVariables>
    <Set>
        <Headers>
            <Header name="X-Developer-email">{developer.email}</Header>
        </Headers>
    </Set>  
    <AssignTo createNew="false" transport="http" type="response"/>
</AssignMessage>

this is got developer email and how can send this to api's body

[dchiesa1]

The documentation for AssignMessage shows how you can set the body, or Payload of any message.

See this example for how to refer to a variable in a Payload element.