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eth_protocolVersion

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`eth_protocolVersion` reports the version of the Ethereum **wire (devp2p `eth`) protocol** the underlying node implements. It is a connectivity- and capability-probe method: use it to confirm your endpoint is reachable and authenticated before issuing heavier calls, or to record which protocol generation served a request.

The result is a string containing a hex-encoded integer (for example `"0x41"` = 65, the `eth/65` wire protocol). It is **not** the chain ID, the client version, or the EVM/network version — for those see [`net_version`](../net/net_version.md), [`eth_chainId`](./eth_chainId.md), and [`web3_clientVersion`](../web3/web3_clientVersion.md).

This method takes no parameters and is available on the free tier.

Parameters

This method takes no parameters.

Returns

eth_protocolVersion return value
FieldType
resultobject

Examples

curl https://<your-endpoint>/ \
  -X POST -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"eth_protocolVersion","params":[]}'
const res = await fetch("https://<your-endpoint>/", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
  "id": 1,
  "method": "eth_protocolVersion",
  "params": [],
  "jsonrpc": "2.0"
}),
});
const data = await res.json();
import requests
resp = requests.post("https://<your-endpoint>/", json={"id":1,"method":"eth_protocolVersion","params":[],"jsonrpc":"2.0"})
print(resp.json())
{
  "id": 1,
  "result": "0x5",
  "jsonrpc": "2.0"
}

Usage

  1. Transport: HTTP (JSON-RPC).
  2. Networks: mainnet.
  3. Credit cost: 1 per call.

FAQ

What does eth_protocolVersion do?
Returns the Ethereum wire protocol version the node speaks, as a hex-encoded integer.
How many credits does eth_protocolVersion cost?
eth_protocolVersion costs 1 credit(s) per call on Triport by default.
Is eth_protocolVersion available over WebSocket?
eth_protocolVersion is an HTTP JSON-RPC method.