Transaction Stream Service
The Indexer API, Transaction Stream Service, and Custom Processors are currently in beta. Please report any problems you encounter by creating an issue in the aptos-indexer-processors repo.
The Transaction Stream Service is a service that listens to the Aptos blockchain and emits transactions as they are processed. These docs explain how this system works, how to use the Labs-Hosted instance of the service, and how to deploy it yourself.
You can get API access to a transaction stream hosted by Aptos Labs here.