> For the complete documentation index, see [llms.txt](https://docs.sonicsvm.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sonicsvm.org/architecture/clusters.md).

# Clusters

Sonic has several different groups of validators, known as **Clusters**. Each serving different purposes within the overall ecosystem and containing dedicated api nodes to fulfill **JSON-RPC** requests for their respective Cluster.

The individual nodes within a Cluster are owned and operated by third parties, with a public endpoint available for each.

## Links

<table><thead><tr><th width="227">Network Name</th><th>Sonic Testnet</th></tr></thead><tbody><tr><td>Mainnet Alpha </td><td><a href="https://api.mainnet-alpha.sonic.game">https://api.mainnet-alpha.sonic.game</a></td></tr><tr><td>Helius RPC URL</td><td><a href="https://sonic.helius-rpc.com/">https://sonic.helius-rpc.com/</a></td></tr><tr><td>Testnet RPC URL</td><td><a href="https://api.testnet.sonic.game">https://api.testnet.sonic.game</a></td></tr><tr><td>Faucet URL</td><td><a href="https://faucet.sonic.game">https://faucet.sonic.game</a></td></tr><tr><td>Block Explorer URL</td><td><a href="https://explorer.sonic.game">https://explorer.sonic.game</a></td></tr></tbody></table>