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BNB Smart Chain (BSC) RPC Endpoints

Connect to BNB Smart Chain Mainnet through reliable EVM-compatible HTTPS and WebSocket RPC endpoints from OnFinality. Query blocks, balances, smart contracts and logs, submit transactions, subscribe to real-time events, and access historical blockchain state with Archive support.

For advanced workloads, OnFinality also provides BSC Trace and Debug APIs, RPC analytics, scalable rate limits, and dedicated node infrastructure for production applications.

Chain ID56

CurrencyBNB

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Public endpoint rate limit: 5 req/sec

Connect to BNB Smart Chain RPC

Mainnet Testnet

curl -H 'Content-Type: application/json' -d '{"id":1,"jsonrpc":"2.0","method":"eth_blockNumber"}' 'https://bnb.api.onfinality.io/public'

curl -H 'Content-Type: application/json' -d '{"id":1,"jsonrpc":"2.0","method":"eth_blockNumber"}' 'https://bnb.api.onfinality.io/public'

HTTPs

https://bnb.api.onfinality.io/public

https://bnb.api.onfinality.io/public

Websocket

wss://bnb.api.onfinality.io/public-ws

wss://bnb.api.onfinality.io/public-ws

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Up to 500 rps
No daily response limit
Priority Support
Decentralized Servers

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BNB Smart Chain RPC details

Item

Value

Network

BNB Smart Chain Mainnet

Chain ID

Native Token

BNB

Protocol

EVM JSON-RPC

HTTPS

Supported

WebSocket

Supported

Archive Access

Supported

Trace / Debug

Supported on Paid Plans

Public Rate Limit

10 req/min

30-day Uptime

99.99% · Check details

Endpoint Regions

Hong Kong / N. Virginia

BSC Archive RPC and Historical Data

Access current and historical BNB Smart Chain state through OnFinality's Archive-enabled RPC infrastructure. Query historical balances, contract state, blocks, transactions, receipts, and event logs without operating your own BSC archive node.

Query Historical BSC Logs

Use eth_getLogs to retrieve contract events for DeFi analytics, token activity, transaction monitoring, indexers, accounting systems, and other data-intensive applications.

BNB Chain's documentation notes that eth_getLogs is disabled on its listed public Mainnet RPC endpoints. OnFinality supports eth_getLogs together with Archive access for workloads that require historical blockchain data.

Real-Time BSC WebSocket RPC

Connect to BNB Smart Chain over WebSocket for persistent access to live blockchain activity. Use eth_subscribe and WebSocket filters to monitor new blocks, contract events, transactions, and application activity without continuously polling the HTTPS endpoint.

DEX interfaces
Trading systems
Wallets
Token monitoring
Backend services
Real-time dashboards

OnFinality supports eth_subscribe, eth_unsubscribe, and WebSocket-only filter methods for live BSC data workflows.

BSC Trace and Debug APIs

Trace BNB Smart Chain transactions, calls, and blocks to analyse contract execution, investigate failed transactions, debug smart contracts, and build advanced blockchain analytics.

Trace APIs

trace_block
trace_call
trace_callMany
trace_filter
trace_replayTransaction
trace_replayBlockTransactions

Debug APIs

debug_traceTransaction
debug_traceCall
debug_traceBlockByHash
debug_traceBlockByNumber

Trace and Debug access is available on supported paid plans.

Supported BNB Smart Chain RPC Methods

Use the EVM-compatible JSON-RPC method set to read BSC chain data, query smart contracts, submit transactions, retrieve logs, subscribe to events, and inspect execution.

Blocks and chain data

eth_blockNumber
eth_chainId
eth_getBlockByHash
eth_getBlockByNumber
eth_getBlockReceipts

Smart contracts and state

eth_call
eth_estimateGas
eth_getBalance
eth_getCode
eth_getStorageAt

Transactions

eth_sendRawTransaction
eth_getTransactionByHash
eth_getTransactionReceipt
eth_getTransactionCount

Events and real-time data

eth_getLogs
eth_subscribe
eth_getFilterChanges

Trace and debug

trace_block
trace_call
trace_filter
debug_traceTransaction
debug_traceCall

View all supported BSC RPC methods →

Build on BNB Smart Chain with OnFinality

DeFi and DEX Applications

Read liquidity pools and contract state, submit transactions, monitor events, and use WebSocket subscriptions for real-time DeFi applications on BNB Smart Chain.

Trading Bots and Market Data

Monitor blocks, transactions, contract events, and token activity through low-latency HTTPS and WebSocket RPC workflows.

Wallets and Exchanges

Query BNB and BEP-20 balances, estimate gas, submit signed transactions, retrieve receipts, and monitor deposits and withdrawals.

Indexers and Analytics

Combine eth_getLogs, Archive access, blocks, transactions, and receipts to build historical datasets, dashboards, token analytics, and indexing pipelines.

Smart Contract Development and Debugging

Use standard EVM JSON-RPC together with Trace and Debug APIs to inspect contract execution, troubleshoot failed transactions, and analyse complex calls.

BNB Smart Chain Mainnet and Testnet RPC

Environment	Mainnet	Testnet
Network	BNB Smart Chain Mainnet	BNB Smart Chain Testnet
Chain ID	56	97
Currency	BNB	tBNB
HTTPS	Supported	Supported
WebSocket	Supported	Supported
Best for	Production	Development / QA

Dedicated BNB Smart Chain Nodes

Move from shared BSC RPC infrastructure to dedicated nodes when your application needs isolated resources, sustained throughput, intensive historical queries, custom node configuration, or greater infrastructure control.