eth_chainId

Get chain ID on the Avalanche C-Chain network.

Parameters

This method accepts no parameters.

{
  "jsonrpc": "2.0",
  "method": "eth_chainId",
  "params": [],
  "id": 1
}

Returns

QUANTITY - Integer of the chain ID.

• Type: Hexadecimal string
• Format: 0x prefixed
• Avalanche Mainnet: 0xa86a (43114 in decimal)

Implementation Example

cURL

curl -X POST https://api-avalanche-mainnet-archive.n.dwellir.com/YOUR_API_KEY/ext/bc/C/rpc \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "eth_chainId",
    "params": [],
    "id": 1
  }'

JavaScript

const response = await fetch('https://api-avalanche-mainnet-archive.n.dwellir.com/YOUR_API_KEY/ext/bc/C/rpc', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    jsonrpc: '2.0',
    method: 'eth_chainId',
    params: [],
    id: 1
  })
});

const data = await response.json();
console.log(data.result);

Response Example

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0xa86a"
}

Note: Chain ID 43114 (0xa86a in hexadecimal) identifies the Avalanche C-Chain mainnet.

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