Ask HN: Design patterns for REST API integration?

What are common patterns for integrating REST apis?

This is related but not the same as design patterns for building REST apis. Example integration patterns might include:

- use of callbacks to pass data between systems - warehousing entities in some kind document store - use of reverse proxies to grant limited authorization - creating an endpoint as a view of an existing, more complex endpoint perhaps from a vendor

Are there other integration patterns common in various deployments?

Any good books / blogs / experts on this topic to read / subscribe / follow?