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:bulb:**Tip:** Don’t forget to check [What’s new](https://docs.tatum.io/changelog) and our latest updates. *** ## Quick links ### [RPC Nodes: Access 100+ blockchain networks](/docs/rpc-nodes) Utilize JSON-RPC for connection to over 100 blockchain nodes, streamlining your blockchain interaction. ### [Blockchain Data: Indexed Block data](/docs/blockchain-data) Easily retrieve complex blockchain data indexed in a way that's easy to search, handle, and prepared to use in your app. ### [Notifications: Real-Time Blockchain alerts](/docs/notifications) Using blockchain notifications offers significant benefits compared to reading and parsing blocks manually. ### [Fee Estimation: Optimize Transaction Costs](/docs/fee-estimation) Simplify gas fee retrieval for blockchain transactions, crucial for optimizing operational costs on the network. ### [Virtual Accounts: Enhance Blockchain functionality](/docs/virtual-accounts) Integrate virtual accounts to extend blockchain capabilities, enabling features not natively available. ### [KMS: Secure Key Management](/docs/tatum-key-management-system-kms) Tatum KMS offers robust key management for custodial applications, ensuring safe, local transaction signing without exposing sensitive information online.