Discover Harmony, a blockchain optimized for scalability and low-latency transactions. Build high-performance dApps using its RPC gateway.
The Harmony RPC documentation provides developers with a detailed guide to interact with the Harmony blockchain programmatically. Harmony uses a unique sharding mechanism and an effective proof-of-stake (EPoS) consensus to offer scalable and fast transactions with low fees. The documentation includes key API endpoints for querying blockchain data, managing transactions, and interacting with smart contracts. Harmony’s architecture makes it ideal for scalable decentralized applications (dApps), particularly in decentralized finance (DeFi) and enterprise solutions.
– Related: 📚 Supported Blockchains • 🌐 RPC Nodes → Harmony • 🔗 Official Harmony Website
RPC Gateway for Harmony blockchain
Connect to Harmony and Fetch the Latest Block
This widget lets you instantly query the latest block height (or equivalent) for Harmony using a chain-specific RPC method like eth_blockNumber, getblockcount, or getBlockHeight. Useful for connectivity checks, uptime monitoring, or API testing.
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Retrieve Harmony Node Status or Client Version via RPC
Use this pre-configured request to get version or status information for your connected Harmony node. Whether it's web3_clientVersion, getblockchaininfo, or chain-specific endpoints, the method is optimized for each supported blockchain.
Test Harmony RPC Methods in Postman
Explore and test Harmony blockchain methods instantly using our pre-configured Postman collection. Perfect for developers who want to experiment with Harmony RPC endpoints, validate API responses, or integrate Harmony into their applications.
How to use the Harmony Postman Collection
- Get your API key: Visit Tatum Dashboard to obtain your free API key
- Import the collection: Click the "Run in Postman" button below to import the Harmony collection
- Configure your environment: Update the
gateway-api-keyvariable in the Tatum Gateway environment - Start testing: Execute any Harmony RPC method and see real-time responses
Available Harmony interfaces
Harmony - Tatum API
- Generate ONE wallet
- Generate ONE account address from Extended public key
- Transform HEX address to Bech32 ONE address format
- Generate ONE private key
- Web3 HTTP driver
- Get current block number
- Get ONE block by hash
- Get ONE Account balance
- Get ONE Transaction
- Get count of outgoing ONE transactions
- Send ONE from account to account
- Invoke a method in a smart contract on Harmony
- Broadcast signed ONE transaction