> ## Documentation Index
> Fetch the complete documentation index at: https://docs.pulsy.app/llms.txt
> Use this file to discover all available pages before exploring further.

# System Overview

> Meet the main services that make up Atria.

# System Overview

Atria is composed of focused services that separate control, ingestion, execution, and delivery.

## Services

* **Dashboard**: Web UI for creating and monitoring feeds.
* **Management backend**: Coordinates feed metadata, outputs, tags, configuration, deploys, and results for the Dashboard and automation.
* **Orchestrator**: Deployment coordination, lease checks, status updates, and local provisioning.
* **Ingestor**: Blockchain connectivity and block data ingestion.
* **Runtime**: Feed execution, cursor management, filters, and optional functions.
* **Delivery**: Result consumption and webhook delivery.

```mermaid theme={null}
flowchart TB
  Blockchain[Blockchain networks] --> Ingestor
  Dashboard --> Backend[Management backend]
  Backend --> Database[(PostgreSQL)]
  Backend --> Orchestrator
  Ingestor --> NATS[(NATS JetStream and KV)]
  Runtime --> NATS
  NATS --> Runtime
  Orchestrator --> Runtime
  Runtime --> Delivery
  Delivery --> Webhooks[Webhook destinations]
```

## Infrastructure

Atria uses PostgreSQL for core metadata and NATS JetStream/KV for messaging, leases, cursors, chain state, and block data.

See [storage and messaging](/atria/architecture/storage-and-messaging).

For runtime ownership and progress tracking, see [leases and cursors](/atria/architecture/leases-and-cursors).