RPC documentation entries
Explore practical RPC guides for developers, builders, and teams creating reliable Web3 applications and growing blockchain ecosystems with OnFinality.
What is the peaq blockchain and how do you build on it?
peaq is a layer-1 blockchain designed for the Machine Economy, powering Decentralized Physical Infrastructure Networks (DePINs) and machine-related real-world assets. It provides i...
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 Polygon finality and how does it affect your dApp?
Polygon finality is the point at which a transaction becomes irreversible on the Polygon PoS chain. With the Heimdall v2 upgrade, finality now occurs in about 5 seconds, down from ...
What is a Polygon node and how do you run or connect to one?
A Polygon node is a computer running the Polygon PoS client stack—Bor (execution) and Heimdall (consensus)—that maintains a copy of the chain and serves RPC requests. You can run y...
Optimism RPC List: Public Endpoints, Chain Settings, and Production Providers
This page lists public Optimism RPC endpoints, chain settings for OP Mainnet and Optimism Sepolia, and guidance on choosing a production-grade RPC provider. Public endpoints are ra...
Optimism Endpoint: Chain Settings, Connection, and Debugging
An Optimism endpoint is a JSON-RPC URL that lets your dApp or backend read and write data on OP Mainnet or OP Sepolia. This article covers the exact chain settings, how to connect ...
What are the latest Solana RPC updates and how do they affect your dApp?
Solana RPC updates include new JSON-RPC methods, changes to existing endpoints, and shifts in how public and managed infrastructure handle load. Staying current matters because Sol...
What is a Moonbeam node and when should you run one?
A Moonbeam node is a full client for the Moonbeam network, an Ethereum-compatible parachain on Polkadot. Running one gives you local RPC access, block production, and deeper contro...
Klaytn API: What should developers know about RPC, KAS, and node infrastructure?
Klaytn, now rebranded as Kaia, is an EVM-compatible Layer 1 blockchain. Developers interact with it through JSON-RPC endpoints, the Klaytn API Service (KAS) for higher-level REST A...
What are the best Gnosis RPC endpoints for production apps?
Gnosis Chain is an EVM-compatible network with chain ID 100 and xDAI as its native currency. Public RPC endpoints like https://rpc.gnosischain.com work for light testing, but produ...
What Is Composable Finance and How Do You Build on It?
Composable Finance is a cross-chain DeFi infrastructure project that uses IBC to enable trustless communication between different blockchain ecosystems. Its core components include...
Best Ethereum RPC Services for Performance Monitoring in 2025
Performance monitoring for Ethereum RPC endpoints means tracking latency, error rates, throughput, and method-level behavior over time. This article explains what to measure, how t...
Ethereum
Solana
Polygon
Base
Arbitrum
BNB Chain
Polkadot
Optimism
