Build better with Harmony RPC Nodes and APIs

“Our partnership with Chainstack is a major step forward toward Harmony’s goals of adding an increasing number of partners that can help Harmony scale to billions more transactions per day. We’re thrilled that Chainstack is supporting the tremendous growth in demand for Harmony’s dataset enabling billion dollar TVL DeFi ecosystems and numerous GameFi and Metaverse projects being built on Harmony to now have access to blockchain dataset at scale.

We're excited to collaborate with Chainstack to ensure continuous innovation and growth of Harmony's infrastructure, user experience, and interoperability.”

Jack Chan, Engineering and Partnerships, Harmony

Reliable Harmony mainnet and testnet infrastructure

Chainstack makes sure you get access to robust and scalable infrastructure, ready for your Harmony journey, in a matter of minutes.

We take away the burden of managing it so that you can instantly focus on building, trading, and exploring data on Harmony RPC and API.

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Start fast with elastic Harmony RPC nodes

Elastic Harmony RPC nodes* provide personal, geographically diverse, and protected API endpoints you can immediately start using to interact with Harmony networks, starting at $0 per month.

Chainstack elastic Harmony RPC nodes

Unlimited requests, no daily limits
Near-instant deployment
Global endpoint locations
Secure HTTP and WebSocket APIs

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Harmony archive nodes starting at just $49

Get access to Harmony archive nodes to query the entire history of the mainnet—starting at just $49 per month.

And with Chainstack’s Bolt fast sync technology, you can deploy your own dedicated archive node in minutes instead of months.

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Turbocharged sync

With Chainstack’s patented Bolt technology you get fully synced dedicated Harmony RPC nodes in almost no time at all.

By using up-to-date snapshots of the ledger, Chainstack spins up dedicated Harmony RPC nodes with the latest state—so you get a node ready same day rather than having to wait long sync times while spinning it from genesis block.

Introducing Bolt

Hours taken to sync a Harmony node

Dedicated Harmony RPC nodes for dedicated users

Backed up by an expert support team, Chainstack’s dedicated nodes are a go-to for request-intensive workloads on the Harmony network, including traders and plethora of different DeFi projects.

Chainstack dedicated Harmony RPC nodes

Unlimited requests, no daily limits
Rapid deployment through Bolt
Extended API namespaces: debug and txpool
Private hosting options available

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We accept payments in cryptocurrencies for Harmony RPC nodes. Learn more

Chainstack Marketplace

Chainstack is designed to work hand-in-hand with the Harmony ecosystem: tools, apps and services that you use every day to build your applications or amplify returns.

We work closely with developers and Harmony community to ensure seamless integration for our end users.

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Build on Harmony blockchain with us

Discover a wealth of information on how to deploy blockchain infrastructure and build amazing applications using Harmony RPCs and APIs with Chainstack.

Deploy a Harmony RPC node

Deploy an elastic or dedicated Harmony archive or full RPC node on mainnet or testnet.

Harmony operations

Learn how to interact with your Harmony RPC node.

Harmony Tutorials

Deploy your first smart contract on Harmony.

Notes for Harmony API

When communicating with a Harmony RPC node, the Harmony client implements a JSON-RPC specification, a communication protocol allowing one to make remote calls and execute them as if they were made locally.
The Harmony API allows developers to communicate with the Harmony blockchain to build applications. The best way to use the Harmony API is to use a Web3 library such as web3.js if using JavaScript or web3.py using Python.