Arbitrum API

Arbitrum One endpoints use EVM JSON-RPC, including trace and debug methods where available.

Endpoint

Item	Value
Network	Arbitrum One
Protocol	EVM JSON-RPC 2.0
Chain ID	`42161` (`0xa4b1`)
Public HTTPS	`https://arbitrum-one-rpc.blockreq.com/v1/rpc/public`
Private HTTPS	`https://arbitrum-one-rpc.blockreq.com/v1/rpc/BRQ1P0000000000000000000000000000000000000000000000000000`
WSS	`wss://arbitrum-one-rpc.blockreq.com/v1/rpc/BRQ1P0000000000000000000000000000000000000000000000000000` when enabled

Core Methods

See EVM JSON-RPC Methods for the complete method catalog.

Capability	Methods
Latest state	`eth_chainId`, `eth_blockNumber`, `eth_call`, `eth_getBalance`
Archive/all history	`eth_getProof`, old-block `eth_call`, old-block `eth_getStorageAt`
Trace	`trace_block`, `trace_call`, `trace_filter`, `trace_get`, `trace_transaction`, `trace_replayTransaction`
Debug	`debug_traceCall`, `debug_traceTransaction`, `debug_traceBlockByNumber`, `debug_traceBlockByHash`
WSS	`eth_subscribe`, `eth_unsubscribe`

Trace and Debug Examples

trace_block and debug_traceCall require a trace/debug-capable provider lane. For debug_traceCall, include a tracer object.


curl -X POST https://arbitrum-one-rpc.blockreq.com/v1/rpc/BRQ1P0000000000000000000000000000000000000000000000000000 \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"trace_block","params":["latest"],"id":1}'


curl -X POST https://arbitrum-one-rpc.blockreq.com/v1/rpc/BRQ1P0000000000000000000000000000000000000000000000000000 \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"debug_traceCall","params":[{"to":"0x000000000000000000000000000000000000006e"},"latest",{"tracer":"callTracer"}],"id":1}'