Introduction

The Web3 RPC API provides you with an easy way to maintain a constant, secure connection to the blockchain. These nodes provide reliable, real-time data access and interaction capabilities for executing transactions, monitoring block events, and querying network data efficiently.

Supported features

Supported Chains Chain ID JSON-RPC Websockets/Subscriptions gRPC full-node archive-node
Ethereum 1 ✅ ✅ ❌ ✅ ✅
Solana 501 ✅ ✅ ✅ ✅ ✅
Base 8453 ✅ ✅ ❌ ✅ ✅
Binance 56 ✅ ✅ ❌ ✅ ✅
Monad 143 ✅ ✅ ❌ ✅ ✅
zkSync 324 ✅ ✅ ❌ ✅ ✅
Gnosis 100 ✅ ✅ ❌ ✅ ✅
Optimism 10 ✅ ✅ ❌ ✅ ✅
Polygon 137 ✅ ✅ ❌ ✅ ✅
Linea 59144 ✅ ✅ ❌ ✅ ✅
Sonic 146 ✅ ✅ ❌ ✅ ✅
Unichain 130 ✅ ✅ ❌ ✅ ✅
Arbitrum 42161 ✅ ✅ ❌ ✅ ✅
Avalanche 43114 ✅ ✅ ❌ ✅ ✅
Cronos 25 ✅ ✅ ❌ ✅ ✅

Supported API Interaction Methods

  • JSON-RPC — Standard request–response protocol used for blockchain node interactions.
  • WebSockets (Subscriptions) — Persistent, event-driven connections for receiving real-time updates.
  • gRPC (Solana only) — High-performance, streaming-capable remote procedure calls for low-latency and real-time interactions on the Solana blockchain.

Solana gRPC Support

For real-time Solana blockchain data streaming, check out our Solana gRPC documentation using the Yellowstone protocol.

Getting Started

Select a chain from the navigation to view available JSON-RPC methods for that network. Each chain has its own set of methods that can be called using JSON-RPC requests.

Authentication

For authentication details, see the Authentication documentation.

Base URL

The base URL for all Web3 RPC requests is:https://api.1inch.com/web3/{chainId}

Where {chainId} is the chain ID of the network you want to interact with.

Benefits

  • Maximal uptime: we have developed the most advanced internal systems for node health check/load balancing, which enable us to offer the maximum possible uptime.
  • High load resistance: thanks to our significant expertise, we can support high network load without sacrificing uptime.
  • Support for multiple chains: the Web3 RPC API supports different EVM networks, allowing you to interact with various blockchains through a single provider.
  • Seamless integration: easily integrate with your existing web3 projects using standard Web3 libraries.
  • Included in all plans: the Web3 RPC API, is included in all plans
  • Full and archive node support: choose between low-latency full nodes for real-time execution and archive nodes with complete historical blockchain state for analytics, auditing, and backtesting.

Enhanced API services are available as part of our paid plans. They are designed for enterprises with high-demand blockchain interactions or substantial operational scale, ensuring superior performance in terms of connectivity, throughput, and response times.

Example

Here's a simple example using viem to make a JSON-RPC call:


         
         

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import { createPublicClient, http } from "viem";
import { mainnet } from "viem/chains";

const client = createPublicClient({
  chain: mainnet,
  transport: http("https://api.1inch.com/web3/1", {
    fetchOptions: {
      headers: {
        Authorization: `Bearer ${process.env.API_KEY}`
      }
    }
  })
});

// Get the current block number
const blockNumber = await client.getBlockNumber();
console.log("Current block number:", blockNumber);

Potential use cases

  • Decentralized applications (dApps): ensure your dApp has a stable and secure connection to the blockchain for tasks like reading smart contract data, sending transactions, and querying blockchain state.
  • Decentralized exchanges (DEXes): maintain high uptime and reliable data feeds for trading operations, ensuring users can trade assets seamlessly.
  • Trading bots: achieve fast and reliable access to blockchain data to make timely trading decisions and execute trades.
  • Wallets: provide users with real-time balance updates, transaction statuses, and other important blockchain data.
  • Analytics platforms: collect and analyze blockchain data for insights and trends without worrying about node maintenance.

API Reference

For detailed information about each endpoint, refer to the Web3 RPC API section.

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