are u calling any private api, which required any token or API-Key, that
you need to send in your header. or you need to whitelist your IP
Address(env from where you are hitting) on server. then only you will
get response. i am using External API, its working for me. it you want
to test it, do the following.In execution:
https://www.affirm.com/api/promos/v2/GIX13AE33EUODJHQ?amount=8999&field=ala&logo_color=blue&logo_type=logo&page_type=product&show_cta=trueIn
outbound Mapping , Sample response: ...