Harmony

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

Blockchain RPC Gateway for Harmony

Harmony RPC networks

mainnet
https://one-mainnet-s0.gateway.tatum.io
testnet
https://one-testnet-s0.gateway.tatum.io

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.

Get API key For free. No commitment.

Don't have an API key?

Sign up to Dashboard and create your API keys today.
Get higher limits and use debugging tools.

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.

Available Harmony interfaces

Harmony - Tatum API