Skip to main content
Developers can access the debug and trace tools on the Arbitrum blockchain with the following methods:

debug_accountRange

debug_dumpBlock

debug_getAccessibleState

debug_getModifiedAccountsByHash

debug_getModifiedAccountsByNumber

debug_getRawBlock

debug_getRawHeader

debug_getRawReceipts

debug_getRawTransaction

debug_intermediateRoots

debug_preimage

debug_printBlock

debug_traceBadBlock

debug_traceBlockByHash

debug_traceBlockByNumber

debug_traceCall

debug_traceTransaction

Arbitrum uses the Nitro client (a Geth fork) and does not support the trace_* namespace. Instead, use the arbtrace_* methods for pre-Nitro blocks and debug_* methods for post-Nitro blocks.
Blocks older than 22,207,815 were added to the chain before the Nitro migration and cannot be queried with Geth debug_* methods. Starting from block 22,207,815, Arbitrum migrated to Nitro which made Geth debug_* methods available for newer blocks.
Use the following arbtrace_* methods for calling on blocks prior to 22,207,815:

arbtrace_block

arbtrace_call

arbtrace_callMany

arbtrace_filter

arbtrace_get

arbtrace_replayBlockTransactions

arbtrace_replayTransaction

arbtrace_transaction

​
Get your own node endpoint today

Start for free and get your app to production levels immediately. No credit card required.You can sign up with your GitHub, X, Google, or Microsoft account.

​
Pre-built tracers

​
Custom JavaScript tracers need a dedicated node

The tracers listed below are native (built-in) tracers—you select one by name. Custom JavaScript tracers, where you pass raw JavaScript as the tracer, are available as customized solutions on the Enterprise plan on dedicated nodes.
Developers can customize the type of tracing using various debug and trace methods, and there are numerous pre-built tracers available to choose from. Here is a list of the pre-built tracers that can be utilized:

​
4byteTracer

This tracer looks for function signatures that are 4 bytes long during contract execution and gathers information about the method identifiers and the size of the provided data. This information can be helpful in matching a signature against the data size.

​
callTracer

This tracer extracts information about all internal calls made by a transaction, providing visibility into how contracts interact with each other.

​
prestateTracer

This tracer returns sufficient information about an account to create a local execution of the transaction. This procedure runs the given transaction again and monitors every aspect of the state that is modified or accessed during execution.

​
noopTracer

This tracer does nothing but respond with a blank object. This a no operations tracer for testing setup.

​
stylusTracer

This tracer is for debugging Stylus contracts by tracing calls between the WasmVM and EVM, allowing developers to fully understand their Stylus transactions.
Last modified on June 13, 2026