JSON-RPC Proxy

Forward raw JSON-RPC calls to chain nodes through the same unified POST /v1 interface as all other Spectrum methods. Use the rpcProxy method with the native RPC method name and parameters nested inside params.

{
  "jsonrpc": "2.0",
  "method": "rpcProxy",
  "params": {
    "chain": "ethereum",
    "method": "eth_blockNumber",
    "params": []
  },
  "id": 1
}

The request is forwarded as-is to the chain’s RPC node. Dangerous methods (admin, personal, miner, wallet operations) are blocked.

Supported Methods

EVM chains: All standard Ethereum JSON-RPC methods: eth_blockNumber, eth_getBalance, eth_call, eth_getTransactionReceipt, eth_getLogs, trace_*, debug_*, etc.

Solana: Native JSON-RPC methods: getSlot, getBalance, getAccountInfo, getTransaction, getBlock, etc.

Bitcoin: Bitcoin Core RPC methods: getblockcount, getblockhash, getblock, getrawtransaction, etc.

Starknet: Native Starknet JSON-RPC: starknet_blockNumber, starknet_getBlockWithTxs, starknet_call, starknet_estimateFee, starknet_traceTransaction, starknet_getEvents, etc. Transaction-submission methods are blocked at the gateway: starknet_addDeclareTransaction, starknet_addDeployAccountTransaction, starknet_addInvokeTransaction.

Cosmos SDK chains (cosmoshub, osmosis, axelar, noble, agoric): Tendermint RPC methods (status, block, tx, abci_query, etc.).

curl -X POST https://your-endpoint.simplystaking.xyz/v1 \
  -H "Content-Type: application/json" \
  -d '{
  "jsonrpc": "2.0",
  "method": "rpcProxy",
  "params": {
    "chain": "ethereum",
    "method": "eth_blockNumber",
    "params": []
  },
  "id": 1
}'

{
  "jsonrpc": "2.0",
  "result": {
    "data": {
      "jsonrpc": "2.0",
      "result": "0x1234567",
      "id": 1
    }
  },
  "id": 1
}

curl -X POST https://your-endpoint.simplystaking.xyz/v1 \
  -H "Content-Type: application/json" \

{
  "jsonrpc": "2.0",
  "method": "rpcProxy",
  "params": {
    "chain": "ethereum",
    "method": "eth_blockNumber",
    "params": []
  },
  "id": 1
}

{
  "jsonrpc": "2.0",
  "method": "rpcProxy",
  "params": {
    "chain": "ethereum",
    "method": "eth_blockNumber",
    "params": []
  },
  "id": 1
}