# Block Explorer Block explorers provide valuable insights into the network's ledger, which records accounts, the tokens assigned to them, transactions between those accounts, and the creation of new tokens. As users engage in various activities on the network, changes occur within these accounts and tokens. A block explorer serves as an interface that allows you to access and examine this information in detail, offering transparency into the blockchain's operations. A block explorer is available for the [KUB Mainnet](https://www.kubscan.com/). This block explorer provides tools to help you debug smart contracts and transactions: * View, verify, and interact with smart contract source code * View detailed transaction information A testnet explorer for [KUB Testnet](https://testnet.kubscan.com/) is also available. ## API Endpoint | Environment | End Point | | ----------- | --------------------------------- | | KUB Mainnet | | | KUB Testnet | | {% hint style="warning" %} The KUB Scan API enforces a rate limit of 12 requests per minute per IP address. If a user exceeds this rate limit, the system will automatically block the offending IP address for 1 minute {% endhint %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.kubchain.com/tools/block-explorer.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.