Remove Specific Request Headers From Response

Shutdown the server if it is already running.
Open the <API-M_HOME>/repository/deployment/server/synapse-configs/default/sequences/main.xml file.
Add the name of the header to be removed as a property, just before the beginning of send mediator, as shown below
<property name="<name of the header to be removed>" scope="transport" action="remove"/>
<property name="Accept" scope="transport" action="remove"/> <property name="X-JWT-Assertion" scope="transport" action="remove"/> <property name="Cookie" scope="transport" action="remove"/> <send/>
Open the <APIM_HOME>/repository/deployment/server/synapse-configs/default/sequences/fault.xml file.
Add the name of the header to be removed as a property property, just before the beginning of "CORS request handler" sequence, as shown below.
<property name="<name of the header to be removed>" scope="transport" action="remove"/>
<property name="Accept" scope="transport" action="remove"/> <property name="X-JWT-Assertion" scope="transport" action="remove"/> <property name="Cookie" scope="transport" action="remove"/> <sequence key="_cors_request_handler_"/>
Start the server.

Note : The above method removes only the specified headers from the response. If you need to remove all the headers, follow the instructions below.
Open the <APIM_HOME>/repository/deployment/server/synapse-configs/default/sequences/main.xml file.
Add the TRANSPORT_HEADERS property, after the beginning of <out> sequence opening tag, as shown in the example below.
Example
<out> <property name="TRANSPORT_HEADERS" action="remove" scope="axis2"/>
Open the <APIM_HOME>/repository/deployment/server/synapse-configs/default/sequences/fault.xml file.
Add the TRANSPORT_HEADERS property before the <send> mediator, as shown in the example below.
Example
<property name="TRANSPORT_HEADERS" action="remove" scope="axis2"/> <send/>