Hi @Shourabh_Kumar,
In the Response Processing->Transformation step of the Custom Extension, provide the variable name to which you want to assign the access_token value and variable value would be the json attribute from the response of the custom extension containing the access token. The syntax for both would be like below:
Variable name : ${request.headers.authorization} (This will pass the token value as an authorization header in the subsequent steps of your API)
Variable Value: Bearer ${response[customExtension].payload.jsonPath[$.access_token]}
where “access_token” is the json attribute within custom extension’s response containing the access token that you would like to use.
#API-Gateway#API-Management#webMethods