# Block Explorer

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[The Block Explorer](https://github.com/matter-labs/block-explorer) is a tool designed to provide comprehensive insights into all activities occurring on a ZK chain. This tool is especially useful for users and developers who need to monitor or interact with the blockchain. Block Explorer consists of three main components:

* **Block Explorer Worker:** This indexer service manages ZK chain data. Its main role is to collect data from the blockchain in real time, process this data, and populate a database that supports the API.
* **Block Explorer API:** This component offers an HTTP API to access structured data from the ZK chain. It retrieves data from the database maintained by the Block Explorer Worker.
* **Block Explorer App:** This is the user interface that enables users and developers to navigate and examine transactions, blocks, batches, contracts, tokens, and other elements within the ZK chain.