Integration of existing STS - JWT API to Auth0

Hi, I am new to Auth0, we are developing a product and plan to use Auth0 for authentication as we need to enable multiple authentication techniques based on our customers; one of our customers’ say that we need to invoke their STS based API which will issue a JWT access token, can we configure Auth0 to call this WebAPI and will it work this way?

So if I understand correctly, you have an API in AWS which you want to be authorized with Auth0… If that’s the case, you might have a look at Custom Authorizers