Question 1

What is a Solana archive node, and when do you actually need one?

Accepted Answer

A Solana archive node keeps the full ledger history rather than pruning older slots, so you can query historical blocks, transactions, and account states that a standard node has already discarded. Most apps never touch that data, but indexers, analytics pipelines, tax and compliance tooling, and backfill jobs depend on it.

This page explains what archive access changes in practice, how to tell whether your workload needs it, and how to connect through an RPC API or a dedicated node when you do. It also covers the operational tradeoffs, the failure modes you will hit, and how to evaluate a provider before you migrate production traffic.

Question 2

Solana HTTP API: How Do You Connect, Sign, and Debug JSON-RPC Calls?

Accepted Answer

The Solana HTTP API is the JSON-RPC interface your app uses to read accounts, submit transactions, and query the cluster over standard HTTPS. You send a POST request with a JSON body to an RPC endpoint, and the node returns a JSON result or an error object. This article covers the request shape, the methods you will use most, and how to debug the failures that show up in real Solana apps. It also explains when a shared public endpoint is enough and when a dedicated Solana node is the better fit for production traffic.

Question 3

What is the peaq network blockchain, and how do you connect to it?

Accepted Answer

peaq is a Layer-1 blockchain built for machines, vehicles, robots, and other devices that need on-chain identity, payments, and data. Its EVM-compatible runtime means most Ethereum tooling works with only a network change, which is why developers usually start by connecting an RPC endpoint and reading chain state.

This page explains what peaq is, how to add it to a wallet, how to make JSON-RPC calls, and how to decide between a shared RPC API and dedicated node infrastructure as your workload grows.

Question 4

What is a Binance Smart Chain archive node and when do you need one?

Accepted Answer

A Binance Smart Chain (BNB Smart Chain) archive node keeps the full historical state of the chain, so you can query balances, storage slots, and contract state at any past block height. Standard full nodes prune old state, which is why historical queries fail against them. Archive access is essential for analytics, tax and accounting tools, indexers, and any backend that needs to reconstruct what happened at a specific block. You can connect to an archive-capable endpoint through OnFinality's RPC API or run a dedicated archive node when your workload needs consistent historical throughput.

Question 5

Celo API Access: Chain Settings, Methods, and Failure Modes

Accepted Answer

The Celo API is a JSON-RPC interface that lets your application read chain state, submit transactions, and subscribe to events on Celo Mainnet. You connect to it through an HTTPS endpoint using standard EVM methods such as eth_blockNumber, eth_getBalance, and eth_call, plus Celo-specific calls for fee currencies and mobile-friendly gas abstraction. This article covers the chain settings you need, how to send your first request, and how to diagnose the failures developers hit most often. It also explains when a shared public endpoint is enough and when a dedicated Celo node is the better fit for production workloads.

Question 6

TON API Keys: How Do You Get One and When Do You Need It?

Accepted Answer

A TON API key is a credential that authenticates your requests to a TON RPC or HTTP API endpoint, letting a provider attribute traffic to your project and apply its own rate limits and access rules. Public endpoints usually work without a key, but they are shared and best suited to prototypes, while production apps typically need a keyed endpoint or a dedicated node.

This article explains what a TON API key actually does, how to get one, how to send your first authenticated request, and when a shared keyed endpoint stops being enough and a dedicated TON node becomes the better fit.

Question 7

Polygon Mainnet RPC: How Do You Connect to Chain ID 137?

Accepted Answer

Polygon Mainnet is an EVM-compatible chain identified by chain ID 137, with POL as its native gas token. To connect, point your wallet or app at an HTTP or WebSocket RPC endpoint and confirm the chain ID matches 137 before sending transactions. OnFinality provides a public Polygon endpoint for testing and dedicated Polygon node infrastructure for production workloads that need consistent capacity.

Question 8

What should I know about Polygon PoS endpoints?

Accepted Answer

Polygon PoS endpoints are the HTTP and WebSocket URLs your app uses to read chain state and submit transactions to the Polygon proof-of-stake network. The mainnet chain ID is 137, the native gas token is POL, and a working endpoint needs to support the JSON-RPC methods your workload actually calls. This page covers chain settings, endpoint options, request examples, and the failure modes that show up in production.

Use it to decide whether a shared public endpoint is enough for your traffic or whether you need a dedicated Polygon node. OnFinality provides Polygon PoS RPC through its API service and dedicated node infrastructure, so you can start on a shared endpoint and move to isolated capacity as your request volume or indexing needs grow.

Question 9

What is the Binance Beacon Chain explorer and how do you query it?

Accepted Answer

The Binance Beacon Chain was the staking and governance layer of the BNB Chain ecosystem, running alongside BNB Smart Chain before the two were merged in the 2024 opBNB-era consolidation. Its explorer let you inspect validators, delegations, and cross-chain activity. Today, most developers interact with the BNB Chain ecosystem through BNB Smart Chain RPC endpoints instead.

This page explains what the Beacon Chain explorer showed, why it matters for historical lookups, and how to move to the BNB Smart Chain RPC workflow that OnFinality supports for production apps. You can connect to a public endpoint for testing or run dedicated node infrastructure for heavier workloads.

Question 10

Base L2 on Ethereum: How to Connect and When to Use It

Accepted Answer

Base is an Ethereum Layer 2 network that settles transactions on Ethereum while executing them on its own chain. Developers interact with it through an EVM-compatible JSON-RPC endpoint, which means most Ethereum tooling works with only a chain ID and RPC URL change. This article explains what Base is, how it relates to Ethereum, and how to connect to it reliably.

You will find chain settings, a working connection example, and practical guidance on choosing between the public endpoint and managed or dedicated node infrastructure. The goal is to help you decide how to wire Base into your stack and what to check before moving to production.

Question 11

What is an ETH public RPC and when should you use one?

Accepted Answer

An ETH public RPC is a shared, unauthenticated JSON-RPC endpoint that lets any developer read Ethereum data and broadcast transactions without running a node. It is ideal for prototyping, wallet configuration, and low-volume scripts, but shared capacity and rate limits make it a poor fit for production workloads that need consistent throughput, archive data, or WebSocket subscriptions.

This page explains how to connect to an Ethereum public RPC, how to verify it works, and the exact signals that tell you it is time to move to a managed or dedicated endpoint. It also covers chain settings, common failure modes, and a practical migration path to OnFinality RPC when your app outgrows the public tier.

Question 12

What is a Base NFT API and how do you query NFT data on Base?

Accepted Answer

A Base NFT API is the set of RPC methods and indexed data services you use to read NFT ownership, metadata, and transfer history on the Base network. Standard JSON-RPC calls like eth_call, eth_getLogs, and eth_getBalance cover on-chain reads, while indexer-style APIs add pre-aggregated ownership and collection data. This article explains which approach fits which workload and how to connect reliably.

You will see how to query ERC-721 and ERC-1155 contracts directly over Base RPC, when an indexer is the better tool, and how to configure a production endpoint. OnFinality provides Base RPC API access and dedicated node infrastructure if you need consistent throughput for NFT-heavy read traffic.

API Service

Dedicated Nodes

Enterprise Nodes

Indexer Services

Network Prototyping Tools

Staking & Validators

AI Agent

RPC documentation entries

What is a Solana archive node, and when do you actually need one?

Solana HTTP API: How Do You Connect, Sign, and Debug JSON-RPC Calls?

What is the peaq network blockchain, and how do you connect to it?

What is a Binance Smart Chain archive node and when do you need one?

Celo API Access: Chain Settings, Methods, and Failure Modes

TON API Keys: How Do You Get One and When Do You Need It?

Polygon Mainnet RPC: How Do You Connect to Chain ID 137?

What should I know about Polygon PoS endpoints?

What is the Binance Beacon Chain explorer and how do you query it?

Base L2 on Ethereum: How to Connect and When to Use It

What is an ETH public RPC and when should you use one?

What is a Base NFT API and how do you query NFT data on Base?

Never Worry about Infrastructure Again

Supported Networks

Product

Company

Resources

Network RPC RPC Assistant

RPC documentation entries

What is a Solana archive node, and when do you actually need one?

Solana HTTP API: How Do You Connect, Sign, and Debug JSON-RPC Calls?

What is the peaq network blockchain, and how do you connect to it?

What is a Binance Smart Chain archive node and when do you need one?

Celo API Access: Chain Settings, Methods, and Failure Modes

TON API Keys: How Do You Get One and When Do You Need It?

Polygon Mainnet RPC: How Do You Connect to Chain ID 137?

What should I know about Polygon PoS endpoints?

What is the Binance Beacon Chain explorer and how do you query it?

Base L2 on Ethereum: How to Connect and When to Use It

What is an ETH public RPC and when should you use one?

What is a Base NFT API and how do you query NFT data on Base?

Never Worry about Infrastructure Again

Supported Networks

Product

Company

Resources