Question 1

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.

Question 2

Fantom API: Methods, Endpoints, and How to Start Building

Accepted Answer

The Fantom API provides JSON-RPC methods for interacting with the Fantom Opera blockchain, covering balances, transactions, event logs, gas estimation, and debugging. This reference covers public endpoints, supported methods, and how to connect reliably for production dApps.

Question 3

BNB Testnet RPC: Endpoint, Chain ID, Faucet & Wallet Setup

Accepted Answer

BNB Smart Chain Testnet (BSC Testnet) uses chain ID 97 (0x61) and tBNB as gas. For light testing, you can use the official public endpoint https://bsc-testnet-dataseed.bnbchain.org (and other official dataseed endpoints), but those are rate-limited to 10,000 requests per 5 minutes and may disable eth_getLogs. OnFinality provides a public BNB testnet RPC at https://bnb-testnet.api.onfinality.io/public with EVM-compatible HTTPS and WebSocket support, archive data, and trace/API access for developers who need more consistent test infrastructure. To start, request tBNB from the BNB faucet, add the network to MetaMask with the correct settings, and verify connectivity with eth_chainId or eth_blockNumber. Keep the testnet endpoint separate from mainnet (chain ID 56 / 0x38). If you encounter 429 rate-limit errors or wrong-network rejections, switch to a private endpoint or recheck the chain ID. For contract deployment and CI/CD workflows, refer to the BNB Smart Chain Testnet Developer Guide.

Question 4

Blockchain Node as a Service: Key Criteria for Choosing a Provider

Accepted Answer

Blockchain node as a service (also called node-as-a-service or NaaS) lets developers access blockchain nodes without running, syncing, or maintaining their own infrastructure. Instead, a provider manages the hardware, node software, and networking, exposing API endpoints for your dApp to interact with the blockchain. This article outlines the key criteria you should evaluate when selecting a provider — from network coverage and node types to pricing and support — so you can make an informed decision for your Web3 project.

Question 5

Best Crypto Bridge API: What Should Developers Evaluate Before Integrating?

Accepted Answer

A crypto bridge API provides a programmatic interface for moving assets or data across blockchains. While many services offer bridge APIs, their performance and reliability depend heavily on the underlying RPC infrastructure. This article outlines the key criteria developers should consider when choosing a bridge API, with a focus on how RPC endpoint quality impacts bridge operations. We'll also discuss how OnFinality's RPC services can support bridge infrastructure needs.

Question 6

What is the Aleph Zero RPC endpoint and how do you connect?

Accepted Answer

Aleph Zero is a Layer 1 blockchain focusing on privacy and scalability using a novel consensus mechanism. Its RPC endpoint allows developers to interact with the chain via JSON-RPC calls. This page covers chain settings, available endpoints, common JSON-RPC methods, and how to choose a reliable RPC provider for production workloads.

Question 7

What is an Abstract RPC and how do I start using it?

Accepted Answer

Abstract is an Ethereum Layer 2 chain that uses zero-knowledge proofs. To connect, you need an Abstract RPC endpoint, chain ID, and the native token address. This guide covers mainnet and testnet settings, faucet URLs, and common debugging tips. Use a reliable RPC provider to ensure low-latency access to Abstract's infrastructure.

Question 8

Solana RPC Access: Authentication, Rate Limits & Common Errors

Accepted Answer

Solana RPC access uses JSON-RPC over HTTP and WebSocket. Public endpoints such as https://api.mainnet-beta.solana.com require no key but enforce changing rate limits and are intended for devnet/testnet work or low-volume testing. Production workloads should use an authenticated managed endpoint from OnFinality or another provider; you supply an API key as a header or query parameter. If the key is missing, expired, or lacks plan entitlements, requests return 401 Unauthorized or 403 Forbidden. Exceeding your plan or public limit returns 429 Too Many Requests; implement client-side throttling and exponential backoff with jitter instead of retrying immediately. Timeouts can come from node congestion or network path issues, so use bounded timeouts and one or more fallback endpoints with a circuit breaker. Stale data occurs when reads come from a lagging node or cached response; enforce a minimum confirmed commitment and check recent blockhash freshness before signing. Before moving traffic, verify the current Solana endpoints, plan limits, WebSocket support, and fallback configuration on the Solana network page. Collect request IDs, timestamps, endpoint URLs, and response bodies before contacting support.

Question 9

Solana Public RPC Endpoints

Accepted Answer

Solana public RPC endpoints are free, shared JSON-RPC gateways that let developers read network state, send transactions, and subscribe to updates without running their own node. The mainnet endpoint is `https://api.mainnet-beta.solana.com`; Devnet uses `https://api.devnet.solana.com`. They require no API key and support standard Solana RPC methods, which makes them convenient for prototyping, development, and low-volume testing. Public endpoints are shared across all users, so the operator enforces rate limits and can change them without notice. They do not provide archive data by default, WebSocket capacity is shared, and there is no uptime guarantee. That makes them unsuitable for production dApps with real users or high request volumes. For development, use Devnet and test SOL from the official faucet. For production, a managed Solana RPC service or dedicated node provides predictable capacity, HTTP/WebSocket access, archive support, and a support path. Before choosing, estimate request volume, required RPC methods, and latency expectations. Always check the current Solana cluster documentation before relying on a public endpoint.

Question 10

Abstract RPC Endpoint: What You Need to Connect to Abstract

Accepted Answer

Abstract is an Ethereum Layer 2 network built with zkSync technology. To connect your dApp or wallet to Abstract, you need an RPC endpoint address. This article provides the official Abstract RPC endpoints for mainnet and testnet, chain IDs, and developer resources like faucets and explorers. We also discuss how to evaluate RPC providers for reliability and performance on Abstract.

Question 11

What are the key differences between dedicated and shared node access for blockchain applications?

Accepted Answer

Dedicated node access gives you exclusive use of a blockchain node, while shared node access means multiple users connect to the same endpoint. The choice affects performance, reliability, privacy, and cost. To help you decide, we compare isolation, rate limits, latency, customization, and pricing.

Question 12

What is Bittensor RPC and how do you connect to it?

Accepted Answer

Bittensor RPC enables developers to interact with Bittensor's decentralized AI network via Substrate (subtensor) and EVM APIs. This reference covers mainnet and testnet endpoints, chain settings, code examples, and criteria for choosing an RPC provider for your dApp or AI agent.

API Service

Dedicated Nodes

Enterprise Nodes

Indexer Services

Network Prototyping Tools

Staking & Validators

AI Agent

RPC documentation entries

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

Fantom API: Methods, Endpoints, and How to Start Building

BNB Testnet RPC: Endpoint, Chain ID, Faucet & Wallet Setup

Blockchain Node as a Service: Key Criteria for Choosing a Provider

Best Crypto Bridge API: What Should Developers Evaluate Before Integrating?

What is the Aleph Zero RPC endpoint and how do you connect?

What is an Abstract RPC and how do I start using it?

Solana RPC Access: Authentication, Rate Limits & Common Errors

Solana Public RPC Endpoints

Abstract RPC Endpoint: What You Need to Connect to Abstract

What are the key differences between dedicated and shared node access for blockchain applications?

What is Bittensor RPC and how do you connect to it?

Never Worry about Infrastructure Again

Supported Networks

Product

Company

Resources

OnFinality RPC Assistant

RPC documentation entries

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

Fantom API: Methods, Endpoints, and How to Start Building

BNB Testnet RPC: Endpoint, Chain ID, Faucet & Wallet Setup

Blockchain Node as a Service: Key Criteria for Choosing a Provider

Best Crypto Bridge API: What Should Developers Evaluate Before Integrating?

What is the Aleph Zero RPC endpoint and how do you connect?

What is an Abstract RPC and how do I start using it?

Solana RPC Access: Authentication, Rate Limits & Common Errors

Solana Public RPC Endpoints

Abstract RPC Endpoint: What You Need to Connect to Abstract

What are the key differences between dedicated and shared node access for blockchain applications?

What is Bittensor RPC and how do you connect to it?

Never Worry about Infrastructure Again

Supported Networks

Product

Company

Resources