RPC documentation entries
Explore practical RPC guides for developers, builders, and teams creating reliable Web3 applications and growing blockchain ecosystems with OnFinality.
Arbitrum One Testnet RPC: Which Endpoint Should You Actually Use?
Arbitrum One is the mainnet chain (chain ID 42161). The testnet that developers usually mean when they say "Arbitrum One testnet" is Arbitrum Sepolia (chain ID 421614), which uses ...
How do I add BNB Smart Chain Testnet to MetaMask?
This guide walks through adding BNB Smart Chain Testnet to MetaMask, covering chain settings, funding with tBNB, and common configuration pitfalls. It also explains how to choose a...
How to Get and Use USDC on BNB Testnet
This article explains how to obtain and use USDC on the BNB Smart Chain testnet. It covers the difference between native and bridged USDC, how to get testnet USDC via faucets or by...
How to connect to Solana Devnet RPC endpoints
Solana Devnet is a testnet for developers to build and test Solana programs without risking real funds. This page explains how to connect to Solana Devnet RPC endpoints, get SOL fr...
Devnet Solana RPC: Endpoint, Faucet, and Debugging Guide
Learn how to connect to Solana Devnet RPC endpoints, get test SOL from the faucet, and debug common issues. This guide covers chain settings, request examples, and how to choose be...
Polygon Amoy RPC Endpoint: Chain Settings, Faucet, and Debugging
Get the Polygon Amoy RPC endpoint, chain ID, and explorer details for testnet development. Learn how to configure wallets and dApps, get test POL from the faucet, and debug common ...
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....
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...
Sepolia Beacon RPC Endpoint: Chain Settings, Methods, and Debugging
A Sepolia beacon RPC endpoint exposes the consensus layer of the Ethereum Sepolia testnet, letting you query validator duties, finality, and blob data. This page covers the chain s...
What is Solana Devnet and how do you use it for development?
Solana Devnet is a free, public test network where developers can deploy programs, test transactions, and simulate mainnet behavior without using real SOL. It mirrors the Solana ru...
What is a Bitcoin Testnet RPC and how do you use it?
Bitcoin Testnet RPC endpoints let developers connect to a Bitcoin test network for development and testing without risking real funds. This article explains what Bitcoin Testnet RP...
What is a TON testnet RPC and how do you use it?
A TON testnet RPC endpoint lets you interact with the TON testnet, a sandbox environment for building and testing dApps, wallets, and smart contracts without risking real TON. This...
Ethereum
Solana
Polygon
Base
Arbitrum
BNB Chain
Polkadot
Optimism
