Learn how Stackup's infrastructure works behind the scenes to provide industry-leading reliability and security.


Requests from your application are sent to an API gateway. This gateway authenticates requests and routes them to the relevant service. The primary services are bundlers and nodes, which communicate to each other in dedicated instances, and paymasters. A health monitor is used by the Stackup team to ensure reliability, and an Events Indexer captures on-chain events for faster retrieval.

An image showing the architecture of Stackup's infrastructure. Requests are load balanced into an API gateway, which routes requests to cloud instances of Stackup's core services.

Diagram of Stackup's core services


Stackup follows industry best practices and tools for ensuring the security of its infrastructure. Please contact us for inquiries about specific practices.