eth_chainId - Base RPC Method

Get the chain ID for Base. Essential for transaction signing and network verification.

Returns the chain ID used for transaction signing on Base.

Why Base? Build on Coinbase's L2 with 54% of L2 market revenue and direct access to 110M+ Coinbase users with $8B+ TVL, $0.08 gas fees, built-in Coinbase distribution, and seamless fiat rails.

Use Cases

The eth_chainId method is essential for:

Transaction signing - Ensure transactions are signed for the correct network
Network verification - Confirm connection to the expected chain
Multi-chain apps - Handle different networks programmatically
Wallet integration - Validate network before transactions

Code Examples

Bash

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

net_version - Get network version
eth_syncing - Check sync status

trace_transaction

Get traces for a specific transaction on Base. Requires archive node for consumer dApps, SocialFi, NFT marketplaces, and merchant payment integrations.

eth_syncing

Check the sync status of your Base node. Returns sync progress or false when fully synced — essential for node health monitoring and dApp reliability.

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Related Methods