RPC documentation entries
Explore practical RPC guides for developers, builders, and teams creating reliable Web3 applications and growing blockchain ecosystems with OnFinality.
Ethereum Sepolia RPC Endpoint: Chain Settings, Setup, and Debugging
Get the Ethereum Sepolia RPC endpoint, chain ID, and network settings for wallets and dApps. Learn how to connect, get test ETH, and debug common RPC issues on this testnet....
Polygon Node RPC: Endpoints, Chain Settings, and Provider Selection
Polygon node RPC endpoints let applications read and write data on the Polygon network using the standard JSON-RPC interface. This page covers the mainnet and Amoy testnet chain se...
What is the Kaia API and how do you connect to it?
The Kaia API is the JSON-RPC interface for the Kaia blockchain, an EVM-compatible Layer 1 network. It lets you read chain data, send transactions, and interact with smart contracts...
What is Bitcoin Testnet and How Do You Use It for Development?
Bitcoin Testnet is a public, parallel blockchain for testing Bitcoin applications without risking real funds. Developers use it to send test transactions, validate wallet integrati...
Kusama Migration: What Changed and How to Update Your RPC Endpoints
The Kusama migration moved core functionality from the Relay Chain to Asset Hub, changing how developers connect to the network. This guide explains what changed, how to update you...
Composable RPC: Endpoints, Dedicated Nodes, and Integration Guide
Composable Finance is a cross-chain DeFi infrastructure project that enables trustless interoperability across ecosystems like Ethereum, Polkadot, Kusama, Cosmos, and NEAR. This gu...
Sonic Network RPC: Chain Settings, Endpoints, and Provider Selection
Sonic is a high-performance EVM Layer-1 blockchain with sub-second finality. This page covers the official Sonic network RPC settings, how to connect your wallet or dApp, and how t...
Polygon MATIC API: What Should Developers Know?
The Polygon MATIC API refers to the set of interfaces developers use to interact with the Polygon PoS chain, including JSON-RPC endpoints for reading and writing blockchain data. T...
Crust Network Staking: How GPoS Works and What to Check Before Staking CRU
Crust Network is a Substrate-based layer-1 blockchain that provides decentralized IPFS storage. Its GPoS (Guaranteed Proof of Stake) consensus ties staking power to storage resourc...
Acala RPC: How to Connect to Acala Network Endpoints
Acala is a Polkadot parachain focused on DeFi, and it exposes both Substrate RPC and an EVM+ interface. This article explains the available Acala RPC endpoints, how to configure wa...
What is an Ethereum RPC endpoint and how do you choose the right one?
An Ethereum RPC endpoint is the URL your dapp, wallet, or backend uses to talk to an Ethereum node via JSON-RPC. Public endpoints are free but rate-limited, while managed and dedic...
Optimism Nodes: Public, Managed, or Self-Hosted?
Optimism nodes are the software clients that let you read and write data on OP Mainnet, the leading Ethereum Layer 2. You can run your own node for full control, or use a managed R...
Ethereum
Solana
Polygon
Base
Arbitrum
BNB Chain
Polkadot
Optimism
