rpc_modules - Cronos RPC Method
Inspect which JSON-RPC namespaces are enabled on your Cronos endpoint. Useful for capability checks, client diagnostics, and RPC feature discovery.
Returns the enabled JSON-RPC namespaces exposed by the connected Cronos endpoint together with their version strings.
Non-standard method.
rpc_modulesis 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 Cronos? Build on the EVM-compatible Crypto.com blockchain with fast finality and deep Crypto.com ecosystem integration.
When to Use This Method
rpc_modules is useful for Cronos developers building DeFi and payment applications:
- Capability Discovery — Detect whether namespaces like
debug,trace,txpool, orerigonare 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
Code Examples
Error Handling
| Error Code | Message | Description |
|---|---|---|
| -32601 | Method not found | The client or endpoint does not expose rpc_modules |
| -32603 | Internal error | The node rejected or failed to process the request |
Related Methods
web3_clientVersion- Inspect the client software version stringdebug_traceTransaction- Debug namespace exampletrace_transaction- Trace namespace example
eth_protocolVersion
Get the current Ethereum protocol version on Cronos. Useful for client compatibility checks and identifying version-gated features.
eth_mining
Check the legacy eth_mining compatibility method on Cronos. Public endpoints often return a client-specific unsupported-method response instead of a boolean.