Question 1

BSC API: JSON-RPC Methods, WebSocket, Finality & Examples

Accepted Answer

The BSC API is the JSON-RPC interface for BNB Smart Chain (BSC), an EVM-compatible network with mainnet chain ID 56 and testnet chain ID 97. Developers use standard Ethereum-style methods such as eth_blockNumber, eth_getBalance, eth_call, eth_getLogs, and eth_sendRawTransaction, plus BSC-specific finality methods like eth_getFinalizedHeader, eth_getFinalizedBlock, and eth_newFinalizedHeaderFilter. OnFinality exposes EVM-compatible HTTPS and WebSocket endpoints for BSC, including a public mainnet endpoint at https://bnb.api.onfinality.io/public and a public testnet endpoint at https://bnb-testnet.api.onfinality.io/public. For production workloads, use your OnFinality API key and private endpoint from the dashboard. This page covers method categories, finality behavior, WebSocket subscriptions, and curl/viem examples. Use the official BNB public endpoints only for testing: the public list rate limit is 10K/5min and eth_getLogs is disabled on listed mainnet endpoints; OnFinality endpoints are managed separately and should be validated against your plan.

Question 2

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 3

Binance Smart Chain Developer Guide for BNB Smart Chain

Accepted Answer

Binance Smart Chain, now officially BNB Smart Chain (BSC), is an EVM-compatible layer-1 blockchain with 3-second block times, mainnet chain ID 56, and testnet chain ID 97. Solidity developers can reuse Ethereum tooling—Hardhat, Foundry, OpenZeppelin, ethers.js, and web3.js—with minimal configuration changes. You need a reliable RPC endpoint: OnFinality provides EVM-compatible HTTPS and WebSocket RPC endpoints, Archive support, and trace/API access at https://bnb.api.onfinality.io/public for mainnet and https://bnb-testnet.api.onfinality.io/public for testnet. For testnet development use chain ID 97 and obtain tBNB from a faucet; for mainnet use chain ID 56 and BNB for gas. Deployment follows standard EVM flow: compile, test, estimate gas, send signed transaction, monitor receipt, and verify on BscScan. Handle nonces sequentially to avoid stuck or rejected transactions. Use testnet-to-mainnet promotion with security checks, secret management, contract verification, and rollback readiness. This guide covers Solidity tooling, chain configuration, contract deployment, finality, nonce/gas handling, RPC error diagnosis, and pre-mainnet operational checklists.

Question 4

BNB Smart Chain Testnet Developer Guide for Contracts, CI/CD & Mainnet Readiness

Accepted Answer

BNB Smart Chain Testnet (chain ID 97 / 0x61) is an EVM-compatible sandbox that mirrors BNB Smart Chain mainnet and uses valueless tBNB for gas. This guide helps developers set up Hardhat and Foundry projects, deployment scripts, contract tests, frontend and backend integration, CI/CD pipelines, and a mainnet readiness checklist. OnFinality provides a public testnet endpoint at https://bnb-testnet.api.onfinality.io/public and a dedicated testnet endpoint page for workspace endpoints. Because testnet state can reset or faucets can rate-limit, treat it as a rehearsal environment: automate tBNB funding, isolate credentials, use environment variables, and add retries for transient RPC errors. The goal is not just to deploy a contract, but to validate the same request patterns, event subscriptions, and failure modes you will face on mainnet. This page focuses on BNB Smart Chain (BSC); opBNB and BNB Greenfield are separate networks. If you need endpoint details, see /rpc-assistant/bnb-chain-testnet-endpoint. Use /rpc-assistant/binance-smart-chain-developer for broader BSC developer workflows and /networks/bnb when you are ready for mainnet.

Question 5

How should teams use BNB testnet RPC for releases?

Accepted Answer

BNB testnet RPC matters because Web3 applications depend on stable endpoint access for reads, transactions, dashboards, and backend workflows. The right setup should match your workload, support the networks and testnets you need, make limits visible, and give you a scaling path when shared RPC is no longer enough. For BNB Testnet builders, infrastructure leads, DeFi teams, wallets, games, analytics teams, and backend engineers, this is part of production architecture. A basic endpoint can be fine for a prototype, but production systems need predictable latency, clear request behavior, reliable support, and enough observability to debug incidents.

In practice, the useful question is not just whether an endpoint exists. Teams should check BNB Smart Chain method support, testnet requirements, throughput patterns, and backend reliability. That turns the page from a definition into a decision tool: it helps you decide what to test first, what belongs in staging, and when a production workload may need stronger isolation or clearer request visibility. If you already know the network you need, open /networks/bnb-testnet after using this checklist so you can test the endpoint against your real methods.

Question 6

How should developers choose testnet RPC endpoints?

Accepted Answer

# How should developers choose testnet RPC endpoints? testnet RPC matters because multi-chain testnet applications depend on stable endpoint access for reads, transactions, dashboards, and backend workflows. The right provider should match your workload, support the networks and testnets you need, make limits visible, and give you a scaling path when shared RPC is no longer enough. For developers, QA teams, protocol teams, and release engineers, the provider decision is part of production architecture. A basic endpoint can be fine for a prototype, but production systems need predictable latency, clear request behavior, reliable support, and enough observability to debug incidents. This guide explains how to compare testnet RPC reliability for staging, QA, contract deployments, and release workflows without turning the decision into a generic vendor list.

In practice, the useful question is not just whether an endpoint exists. Teams should check testnet endpoint access, chain settings, faucet assumptions, staging checks, and the path to mainnet. That turns the page from a definition into a decision tool: it helps you decide what to test first, what belongs in staging, and when a production workload may need stronger isolation or clearer request visibility. If you already know the network you need, open /networks/eth-sepolia after using this checklist so you can test the endpoint against your real methods.

Question 7

What should I know about BNB RPC endpoints?

Accepted Answer

# What should I know about BNB RPC endpoints? BNB RPC endpoints matter because Web3 applications depend on stable endpoint access for reads, transactions, dashboards, and backend workflows. The right setup should match your workload, support the networks and testnets you need, make limits visible, and give you a scaling path when shared RPC is no longer enough. For BNB Chain builders, infrastructure leads, DeFi teams, wallets, games, analytics teams, and backend engineers, this is part of production architecture. A basic endpoint can be fine for a prototype, but production systems need predictable latency, clear request behavior, reliable support, and enough observability to debug incidents.

In practice, the useful question is not just whether an endpoint exists. Teams should check BNB Smart Chain method support, testnet requirements, throughput patterns, and backend reliability. That turns the page from a definition into a decision tool: it helps you decide what to test first, what belongs in staging, and when a production workload may need stronger isolation or clearer request visibility. If you already know the network you need, open /networks/bnb after using this checklist so you can test the endpoint against your real methods.

Question 8

BNB Chain RPC Providers Compared: Public, Managed & Dedicated

Accepted Answer

Choosing between public, managed, and dedicated BNB Chain RPC providers comes down to workload risk. Public endpoints, such as the official BSC dataseed URLs, are fine for quick tests but usually impose strict rate limits and disable heavy methods like eth_getLogs. Managed RPC services (including OnFinality's shared BNB endpoint at https://bnb.api.onfinality.io/public) add API key management, analytics, and support, making them suitable for many production dApps. Dedicated BNB nodes provide isolated compute and predictable capacity for high-throughput DeFi, trading, indexing, or gaming workloads. When comparing providers, verify mainnet and testnet coverage (chain IDs 56 and 97), supported methods (standard EVM plus BSC-specific calls like eth_getFinalizedHeader), archive and trace access, WebSocket stability, rate limit and burst policies, regional latency, availability history, failover communication, analytics, and pricing. Test with realistic traffic before committing. Use /networks/bnb as a starting point for endpoint details, then evaluate whether shared RPC or a dedicated node fits your scaling path.

Question 9

How to Scale BNB Chain RPC for High-Throughput Workloads

Accepted Answer

To scale BNB Smart Chain (BSC) RPC for high-throughput workloads, do not treat requests per second as the only metric. A trading bot issuing rapid eth_call and eth_getTransactionReceipt loops, an analytics indexer scanning large block ranges with eth_getLogs, and a wallet backend broadcasting transactions all stress different parts of an RPC service. Plan around method mix, burst capacity, queueing behavior, latency distribution, and rate-limit semantics. Use shared managed RPC like OnFinality's BNB endpoint for initial development and moderate traffic, then evaluate dedicated infrastructure when isolation or predictable capacity becomes business-critical. Instrument retries, exponential backoff, caching, and request-scoped logging from the start. Capacity planning should benchmark representative workloads—not synthetic median calls—against the provider's documented limits, archive support, WebSocket behavior, and observability. Start at /networks/bnb to verify endpoint configuration, chain ID 56, and method support before committing production traffic. Good evaluation avoids a one-size-fits-all provider list and instead tests the exact workload shape your app will generate.

API Service

Dedicated Nodes

Enterprise Nodes

Indexer Services

Network Prototyping Tools

Staking & Validators

AI Agent

RPC documentation entries

BSC API: JSON-RPC Methods, WebSocket, Finality & Examples

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

Binance Smart Chain Developer Guide for BNB Smart Chain

BNB Smart Chain Testnet Developer Guide for Contracts, CI/CD & Mainnet Readiness

How should teams use BNB testnet RPC for releases?

How should developers choose testnet RPC endpoints?

What should I know about BNB RPC endpoints?

BNB Chain RPC Providers Compared: Public, Managed & Dedicated

How to Scale BNB Chain RPC for High-Throughput Workloads

Never Worry about Infrastructure Again

Supported Networks

Product

Company

Resources

BNB Chain RPC Assistant

RPC documentation entries

BSC API: JSON-RPC Methods, WebSocket, Finality & Examples

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

Binance Smart Chain Developer Guide for BNB Smart Chain

BNB Smart Chain Testnet Developer Guide for Contracts, CI/CD & Mainnet Readiness

How should teams use BNB testnet RPC for releases?

How should developers choose testnet RPC endpoints?

What should I know about BNB RPC endpoints?

BNB Chain RPC Providers Compared: Public, Managed & Dedicated

How to Scale BNB Chain RPC for High-Throughput Workloads

Never Worry about Infrastructure Again

Supported Networks

Product

Company

Resources