Question 1

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 2

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 3

What RPC URL should I use for Solana?

Accepted Answer

A Solana RPC URL is the HTTP or WebSocket endpoint your app sends JSON-RPC calls to for reading accounts, submitting transactions, and subscribing to on-chain events. OnFinality exposes a public Solana endpoint at https://solana.api.onfinality.io/public and a matching WebSocket at wss://solana.api.onfinality.io/public-ws, which you can drop into wallets, SDKs, and scripts for testing.

Public endpoints are convenient for development, but production apps usually need dedicated capacity, predictable throughput, and failover. This article covers where the Solana RPC URL goes in common tools, how to verify it works, and when to move from a shared public endpoint to dedicated Solana node infrastructure.

Question 4

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 5

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 6

Solana RPC Nodes: Endpoints, Methods, and Workload Fit

Accepted Answer

Solana RPC nodes expose the JSON-RPC interface your app uses to read accounts, submit transactions, and subscribe to slot or account changes. This page covers the endpoint shape, the methods that matter most in practice, and how to decide between shared public RPC and a dedicated node as your workload grows.

You will get a connectable endpoint example, a workload-to-setup table, a debugging path for common failures, and a short checklist for evaluating a provider before you move traffic to it.

Question 7

Polygon RPC API: Endpoint Settings, Methods, and Debugging

Accepted Answer

The Polygon RPC API is the JSON-RPC interface your app uses to read Polygon PoS state and submit transactions. You connect over HTTP or WebSocket to a node that exposes standard Ethereum-compatible methods such as eth_call, eth_getLogs, and eth_sendRawTransaction. This page covers the exact chain settings, working request examples, and the failure modes developers hit most often. It also explains when a shared public endpoint is enough and when a dedicated Polygon node is the better fit for your workload.

Question 8

Staking KLAY on Klaytn: What Developers Should Check Before You Stake

Accepted Answer

Klaytn (now branded Kaia) uses a delegated proof-of-stake model where KLAY holders can stake through governance councils, public node operators, or liquid staking services rather than running a validator directly. Before you stake, you need to understand the unstaking delay, reward mechanics, and which RPC methods let your app read stake state and validator data reliably.

This page covers the Klaytn staking model, the JSON-RPC calls that matter for staking dashboards and wallets, and how to choose RPC infrastructure that keeps reward tracking and transaction submission responsive. It is written for developers integrating staking features, not for casual holders following a click-through tutorial.

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 Node RPC: Endpoint Settings, Chain IDs, and Debugging

Accepted Answer

Base is an Ethereum L2 built on the OP Stack, so its RPC surface looks familiar to any Ethereum developer: JSON-RPC over HTTP, the same eth_* methods, and chain ID 8453 for mainnet. This article covers the Base node RPC endpoint settings you need, how to add Base to a wallet, how to send your first request, and how to debug the failures that show up most often in production. It also explains when a public endpoint is enough and when a dedicated Base node is the better fit.

Question 11

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 12

What does the Gnosis API expose, and how do you connect to it?

Accepted Answer

The Gnosis API is the JSON-RPC interface exposed by Gnosis Chain nodes. It lets wallets, Safe smart accounts, indexers, and backend services read balances, submit transactions, query logs, and inspect state on a chain that settles in xDAI and runs an EVM-compatible execution layer.

This page covers the chain settings you need, how to make your first request, which methods matter for common Gnosis workloads, and how to decide between a public endpoint and dedicated node infrastructure as your traffic grows.

API Service

Dedicated Nodes

Enterprise Nodes

Indexer Services

Network Prototyping Tools

Staking & Validators

AI Agent

RPC documentation entries

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

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

What RPC URL should I use for Solana?

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

What should I know about Polygon PoS endpoints?

Solana RPC Nodes: Endpoints, Methods, and Workload Fit

Polygon RPC API: Endpoint Settings, Methods, and Debugging

Staking KLAY on Klaytn: What Developers Should Check Before You Stake

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

Base Node RPC: Endpoint Settings, Chain IDs, and Debugging

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

What does the Gnosis API expose, and how do you connect to it?

Never Worry about Infrastructure Again

Supported Networks

Product

Company

Resources

Network RPC RPC Assistant

RPC documentation entries

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

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

What RPC URL should I use for Solana?

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

What should I know about Polygon PoS endpoints?

Solana RPC Nodes: Endpoints, Methods, and Workload Fit

Polygon RPC API: Endpoint Settings, Methods, and Debugging

Staking KLAY on Klaytn: What Developers Should Check Before You Stake

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

Base Node RPC: Endpoint Settings, Chain IDs, and Debugging

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

What does the Gnosis API expose, and how do you connect to it?

Never Worry about Infrastructure Again

Supported Networks

Product

Company

Resources