Hi Raja,

Thank you very much for your response.

In APIM 2.6.0 has already added the above feature[1] and no need any custom implementaion as for APIM 2.1.0. Please take the latest WUM updated pack of APIM 2.6.0 and try out your scenario.

[1]. https://docs.wso2.com/display/AM260/Securing+APIs+with+Mutual+SSL