An EVM-compatible Layer 1 for low-cost DeFi, wallets, games, exchanges, and high-volume applications.
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.
Public endpoint rate limit: 5 req/sec
curl -H 'Content-Type: application/json' -d '{"id":1,"jsonrpc":"2.0","method":"eth_blockNumber"}' 'https://bnb.api.onfinality.io/public'https://bnb.api.onfinality.io/publicwss://bnb.api.onfinality.io/public-wsPower BSC swaps and trading backends with OnFinality RPC. Access BNB Smart Chain archive data and Trace APIs, or isolate workloads on dedicated nodes.
curl 'https://bnb.api.onfinality.io/public' \
-H 'Content-Type: application/json' \
--data '{"id":1,"jsonrpc":"2.0","method":"eth_blockNumber"}'Use the interface and request shown above for an initial check, then test the methods and traffic pattern your application actually needs.
Choose a shared RPC plan by response-unit allowance and peak throughput. Method weights and network-specific availability still apply.
Plan figures checked 8 November 2026. RU are not always raw requests; WebSocket responses also count toward limits. Check the current pricing and this network's method documentation. Node charges and applicable taxes are additional.
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.
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.
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.
OnFinality supports eth_subscribe, eth_unsubscribe and WebSocket-only filter methods for live BSC data workflows.
Trace BNB Smart Chain transactions, calls, and blocks to analyse contract execution, investigate failed transactions, debug smart contracts, and build advanced blockchain analytics.
trace_blocktrace_calltrace_callManytrace_filtertrace_replayTransactiontrace_replayBlockTransactionsdebug_traceTransactiondebug_traceCalldebug_traceBlockByHashdebug_traceBlockByNumberTrace and Debug access is available on supported paid plans.
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.
eth_blockNumbereth_chainIdeth_getBlockByHasheth_getBlockByNumbereth_getBlockReceiptseth_calleth_estimateGaseth_getBalanceeth_getCodeeth_getStorageAteth_sendRawTransactioneth_getTransactionByHasheth_getTransactionReceipteth_getTransactionCounteth_getLogseth_subscribeeth_getFilterChangestrace_blocktrace_calltrace_filterdebug_traceTransactiondebug_traceCallRead liquidity pools and contract state, submit transactions, monitor events, and use WebSocket subscriptions for real-time DeFi applications on BNB Smart Chain.
Monitor blocks, transactions, contract events, and token activity through low-latency HTTPS and WebSocket RPC workflows.
Query BNB and BEP-20 balances, estimate gas, submit signed transactions, retrieve receipts, and monitor deposits and withdrawals.
Combine eth_getLogs, Archive access, blocks, transactions, and receipts to build historical datasets, dashboards, token analytics, and indexing pipelines.
Use standard EVM JSON-RPC together with Trace and Debug APIs to inspect contract execution, troubleshoot failed transactions, and analyse complex calls.
| 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 |
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.
Plan access around the requests, operational requirements and release workflow your application needs.
Start with a connection check, then validate the reads, transactions or data workflows required by your application.
Review method-specific limits, plan allowances and usage before increasing traffic. Different methods can consume different response units.
Use your real client region and request pattern when evaluating latency, retries and service availability.
OnFinality takes away the heavy lifting of DevOps so you can build smarter and faster.
Get StartedBuild and scale blockchain applications with reliable RPC, indexing, and data infrastructure from OnFinality.
Get the latest product updates, technical insights, and key announcements delivered straight to your inbox.
Ethereum
Solana
Polygon
Base
Arbitrum
BNB Chain
Polkadot
Optimism