https://github.com/serverless/event-gateway

The Event Gateway combines both API Gateway and Pub/Sub functionality into a single event-driven experience. It’s dataflow for event-driven, serverless architectures. It routes Events (data) to Functions (serverless compute). Everything it cares about is an event! Even calling a function. It makes it easy to share events across different systems, teams and organizations!

Use the Event Gateway right now, by running the Event Gateway Example Application locally, with the Serverless Framework.

Features:

• Platform agnostic – All your cloud services are now compatible with one another: share cross-cloud functions and events with AWS Lambda, Microsoft Azure, IBM OpenWhisk and Google Cloud Platform.
• Send events from any cloud – Data streams in your application become events. Centralize events from any cloud provider to get a bird’s eye view of all the data flowing through your cloud.
• React to cross-cloud events – You aren’t locked in to events and functions being on the same provider: Any event, on any cloud, can trigger any function. Set events and functions up like dominoes and watch them fall.
• Expose events to your team – Share events and functions to other parts of the application. Your teammates can find them and utilize them in their own services.
• Extendable through middleware – Perform data transforms, authorizations, serializations, and other custom computes straight from the Event Gateway.

The Event Gateway is a L7 proxy and realtime dataflow engine, intended for use with Functions-as-a-Service on AWS, Azure, Google & IBM.