rpc_modules - Unichain RPC Method

Returns the enabled JSON-RPC namespaces exposed by the connected Unichain endpoint together with their version strings.

Non-standard method. rpc_modules is a client-introspection RPC that is commonly available on Geth-compatible stacks, but it is not part of the core Ethereum Execution API method set. Availability varies by client and operator policy.

Why Unichain? Build on Uniswap's DeFi-optimized Superchain L2 with 250ms sub-blocks and 95% lower costs than Ethereum with 250ms sub-blocks (fastest L2), TEE-secured block building, native Superchain interoperability, and 65% revenue to validators.

When to Use This Method

rpc_modules is useful for DeFi developers, liquidity protocol builders, and teams building on the Optimism Superchain:

• Capability Discovery - Detect whether namespaces like debug, trace, txpool, or erigon are exposed before attempting those calls
• Client Diagnostics - Verify what the serving node has enabled when debugging environment-specific issues
• Infrastructure Audits - Compare public and private endpoints to confirm which RPC surfaces are intentionally exposed
• Runtime Feature Gating - Adjust tooling behavior dynamically based on the actual namespaces available on a node

Best Practices

• Call at startup to determine which features are available on a node
• Module availability varies by node client and provider configuration
• Use to gate feature access in applications before attempting unsupported calls
• This is a non-standard method; some endpoints may not expose it

Code Examples

Error Handling

Related Methods

• web3_clientVersion - Inspect the client software version string
• debug_traceTransaction - Debug namespace example
• trace_transaction - Trace namespace example