Question 1

What Are Avalanche Nodes and When Should You Use Them?

Accepted Answer

Avalanche nodes are the backbone of the Avalanche network, handling transaction relay, block production, and consensus. They come in several types: validators, full nodes, archive nodes, and state-sync nodes, each with different data retention and resource needs. This article explains node roles, hardware requirements, and helps you decide whether to run a node yourself or use a managed RPC service like OnFinality.

Question 2

Sepolia RPC: URL, Chain ID, Faucet & Developer Setup

Accepted Answer

Sepolia is the primary Ethereum testnet for contract and dapp development. To use Sepolia RPC, set the chain ID to 11155111 (0xaa36a7), use test ETH as the native currency, and connect to an execution-layer JSON-RPC endpoint over HTTPS or WebSocket. A public endpoint can get you started, but authenticated access from a provider such as OnFinality gives more predictable request limits for CI and repeated testing. Fund a dedicated test wallet from a trusted faucet, and never reuse a mainnet private key or seed phrase. The simplest connectivity check is a JSON-RPC call like eth_blockNumber, followed by the methods your application actually depends on. Verify whether you need archive, trace, or debug support on the endpoint. Before promoting a workflow to Ethereum mainnet, check method coverage, rate limits, and mainnet-specific settings such as chain ID 1 and real ETH fees. Use /networks/eth-sepolia for the current Sepolia endpoint and /pricing/rpc for plan details. Keep Sepolia execution-layer RPC separate from Beacon or consensus APIs, and treat Sepolia strictly as a test environment.

Question 3

Polygon Blockchain API: JSON-RPC Methods, WebSocket & Examples

Accepted Answer

The Polygon blockchain API is the Ethereum-compatible JSON-RPC interface used to interact with Polygon PoS mainnet (chain ID 137) and Polygon Amoy testnet (chain ID 80002). Because Polygon PoS remains EVM-compatible, the execution layer accepts standard Ethereum methods such as eth_call, eth_getLogs, eth_sendRawTransaction, eth_getTransactionReceipt, and eth_estimateGas. Developers send these requests over HTTP for request/response workloads, or open a WebSocket connection for subscriptions such as newHeads, logs, and pending transactions. Archive and trace methods may be available depending on the plan; verify current limits and availability on the Polygon network page before relying on them. For production, replace public endpoints with a dedicated node or managed RPC cluster, test contracts on Amoy first, and handle nonce, gas, and receipt polling carefully. The examples below show minimal curl and ethers.js workflows for reading data, submitting transactions, and subscribing to block headers.

Question 4

What are the Bittensor RPC URLs for mainnet, lite, and testnet?

Accepted Answer

Bittensor offers multiple RPC endpoints for different network tiers: Finney (mainnet) at `wss://entrypoint-finney.opentensor.ai:443`, Lite (EVM-compatible) at `https://lite.chain.opentensor.ai`, and testnet at `https://test.chain.opentensor.ai`. Developers can also use managed providers like OnFinality for reliable dedicated or public endpoints. This guide lists official URLs, chain IDs, and configuration steps for wallets and dApps.

Question 5

Which RPC provider supports the widest range of blockchains?

Accepted Answer

RPC providers differ significantly in the number of blockchain networks they support, but raw network count is only part of the story. OnFinality offers access to over 100+ networks including Ethereum, Solana, Polkadot, BNB Chain, and many testnets, with both shared and dedicated node options. Focus on providers that offer deep support (archive, trace, WebSocket) for the chains you actually need, not just the longest list.

Question 6

How to Connect to Moonbeam: RPC Endpoints, JSON-RPC Methods, and Provider Selection

Accepted Answer

Moonbeam is an Ethereum-compatible parachain on Polkadot. To interact with it, you need a JSON-RPC endpoint. This page covers public endpoints, supported JSON-RPC methods, and how to choose a production-grade RPC provider for Moonbeam, Moonriver, and Moonbase Alpha.

Question 7

Ethereum Blockchain API: JSON-RPC Methods, WebSocket & Examples

Accepted Answer

The Ethereum blockchain API is the JSON-RPC interface that lets applications read from and write to the Ethereum network without running a local node. It exposes core methods such as eth_call for read-only contract simulation, eth_getLogs for filtered event history, eth_sendRawTransaction for broadcasting signed transactions, eth_getTransactionReceipt for confirming inclusion, and eth_estimateGas for gas planning. Every request carries jsonrpc, method, params, and id fields; the response returns a result object or a JSON-RPC error. Access is available over HTTPS for standard request/response patterns and WebSocket for push-based subscriptions like newHeads, logs, and pending transactions. Optional Trace and Debug APIs provide deeper execution tracing but are separate entry points from core methods and not universally available. For production, connect through a managed endpoint such as OnFinality, verify archive and regional access on the Ethereum network page, and keep mainnet chain ID 1 distinct from Sepolia chain ID 11155111. Sign transactions locally and submit via eth_sendRawTransaction; use eth_call for reads and eth_estimateGas before sending.

Question 8

How to Choose a Polkadot RPC Provider for Production dApps

Accepted Answer

Choosing the right Polkadot RPC provider is critical for production dApps, parachains, and cross-chain services. You need to evaluate endpoint reliability, archive data support, latency, and pricing to match your workload. OnFinality offers scalable Polkadot RPC endpoints with archive and trace support, dedicated node options, and transparent pricing to help you build and scale efficiently.

Question 9

Solana Staking API: RPC Methods for Staking Integrations

Accepted Answer

Solana staking integrations rely on core JSON-RPC methods to query stake accounts, validator vote accounts, epoch state, and to build and submit staking transactions. The most important methods are getStakeActivation (stake account lifecycle state), getVoteAccounts (validator and commission data), and getEpochInfo (epoch progress and timing). Production staking dApps typically extend this with simulateTransaction for preflight checks, getLatestBlockhash for transaction construction, sendTransaction for submission, and WebSocket account subscriptions for activation monitoring. Public endpoints such as https://api.mainnet-beta.solana.com and https://api.devnet.solana.com are useful for development, but rate limits and shared capacity make them unsuitable for user-facing staking features. Teams should evaluate RPC providers on support for these methods, clear commitment behavior, archive access for historical stake data, and whether the plan includes the Solana networks you need. Use the Solana devnet faucet at https://faucet.solana.com to obtain test SOL for integration testing before moving to mainnet.

Question 10

Polkadot Validator: Build vs. Buy – Running a Node vs. Using an RPC Provider

Accepted Answer

A Polkadot validator secures the relay chain by staking DOT, validating parachain blocks, and participating in consensus. Running a validator requires significant hardware, administration, and a stake bond. For many developers and dApp operators, using a managed RPC provider eliminates the operational burden while still supporting the network indirectly.

Question 11

RPC TON Network: Endpoints, Provider Comparison, and Troubleshooting

Accepted Answer

Looking for an RPC TON network endpoint? This guide compares TON RPC providers, provides step-by-step setup instructions, and highlights common pitfalls to help you choose the best infrastructure for your dApp, wallet, or bot.

Question 12

TON API: How to Choose and Use Endpoints for Mainnet and Testnet

Accepted Answer

TON API services provide HTTP and WebSocket access to the TON blockchain. Developers can choose between public endpoints, hosted APIs like TON Center and TonAPI, or dedicated node infrastructure from providers like OnFinality. This article compares available options, lists endpoint settings, and covers common setup and debugging steps.

API Service

Dedicated Nodes

Enterprise Nodes

Indexer Services

Network Prototyping Tools

Staking & Validators

AI Agent

RPC documentation entries

What Are Avalanche Nodes and When Should You Use Them?

Sepolia RPC: URL, Chain ID, Faucet & Developer Setup

Polygon Blockchain API: JSON-RPC Methods, WebSocket & Examples

What are the Bittensor RPC URLs for mainnet, lite, and testnet?

Which RPC provider supports the widest range of blockchains?

How to Connect to Moonbeam: RPC Endpoints, JSON-RPC Methods, and Provider Selection

Ethereum Blockchain API: JSON-RPC Methods, WebSocket & Examples

How to Choose a Polkadot RPC Provider for Production dApps

Solana Staking API: RPC Methods for Staking Integrations

Polkadot Validator: Build vs. Buy – Running a Node vs. Using an RPC Provider

RPC TON Network: Endpoints, Provider Comparison, and Troubleshooting

TON API: How to Choose and Use Endpoints for Mainnet and Testnet

Never Worry about Infrastructure Again

Supported Networks

Product

Company

Resources

OnFinality RPC Assistant

RPC documentation entries

What Are Avalanche Nodes and When Should You Use Them?

Sepolia RPC: URL, Chain ID, Faucet & Developer Setup

Polygon Blockchain API: JSON-RPC Methods, WebSocket & Examples

What are the Bittensor RPC URLs for mainnet, lite, and testnet?

Which RPC provider supports the widest range of blockchains?

How to Connect to Moonbeam: RPC Endpoints, JSON-RPC Methods, and Provider Selection

Ethereum Blockchain API: JSON-RPC Methods, WebSocket & Examples

How to Choose a Polkadot RPC Provider for Production dApps

Solana Staking API: RPC Methods for Staking Integrations

Polkadot Validator: Build vs. Buy – Running a Node vs. Using an RPC Provider

RPC TON Network: Endpoints, Provider Comparison, and Troubleshooting

TON API: How to Choose and Use Endpoints for Mainnet and Testnet

Never Worry about Infrastructure Again

Supported Networks

Product

Company

Resources