state_call – Mythos JSON-RPC Method

Executes a runtime API call against the current or historical state. This let's you query information exposed through runtime APIs (such as staking, bridge, or NFT helpers) without crafting extrinsics.

Parameters

Parameter	Type	Required	Description
method	string	Yes	Runtime API function name (for example Metadata_metadataAtVersion).
data	string	Yes	SCALE-encoded parameters for the runtime API call.
at	string	No	Block hash to execute the call against. Defaults to latest.

Request Example

{
  "jsonrpc": "2.0",
  "method": "state_call",
  "params": [
    "Metadata_metadataAtVersion",
    "0x0c000000"
  ],
  "id": 1
}

Tips

• Always encode parameters using the correct SCALE types—use polkadot.js or subxt helpers to avoid manual encoding errors.
• Provide a block hash to obtain deterministic results for marketplace accounting or dispute resolution.
• Check rpc_methods to confirm which runtime APIs are exposed by your node build.

Related Methods

• state_getMetadata
• state_getRuntimeVersion
• state_getStorage