# Reference and Resources

**Access essential XION developer resources:** Testnet tokens, public RPC/API and other endpoints, block explorers, indexer creation guides, and developer tools for building and testing apps.

<table data-view="cards"><thead><tr><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><strong>Requesting XION Testnet Tokens</strong></td><td>Access testnet tokens for paying transaction fees on the Xion Testnet.</td><td><a href="references/xion-testnet">xion-testnet</a></td></tr><tr><td><strong>Public Endpoints</strong></td><td>Endpoints that enable querying blockchain data and submitting transactions.</td><td><a href="references/public-endpoints-and-resources">public-endpoints-and-resources</a></td></tr><tr><td><strong>Block Explorers</strong></td><td>List of user-friendly interfaces to view detailed information about blocks, transactions, accounts, and other on-chain data.</td><td><a href="references/block-explorers">block-explorers</a></td></tr><tr><td><strong>Indexers: Optimized Data Retrieval</strong></td><td>The Key to Efficient Blockchain Data Retrieval.</td><td><a href="../others/archived/cosmwasm-resources/introductory-section">introductory-section</a></td></tr></tbody></table>