Base RPC Endpoints

Dwellir provides Base RPC endpoints at https://api-base-mainnet-archive.n.dwellir.com/<your-api-key> for mainnet (Chain ID 8453) and https://api-base-sepolia-archive.n.dwellir.com/<your-api-key> for Sepolia testnet (Chain ID 84532). Replace <your-api-key> with the key from your Dwellir dashboard.

Yes. WebSocket endpoints are available at wss://api-base-mainnet-archive.n.dwellir.com/<your-api-key> for mainnet and wss://api-base-sepolia-archive.n.dwellir.com/<your-api-key> for Sepolia testnet. Use WebSockets for real-time subscriptions like eth_subscribe for new blocks, pending transactions, and log events.

Yes. Dwellir's Base endpoints run archive nodes on both mainnet and Sepolia testnet, providing full historical state access. You can query balances, call contracts, and trace transactions at any past block height using methods like eth_call, eth_getBalance, and debug/trace APIs.

1. Sign up at dwellir.com and retrieve your API key from the dashboard. 2. Replace your current RPC URL (e.g., https://mainnet.base.org) with https://api-base-mainnet-archive.n.dwellir.com/<your-api-key>. 3. For WebSocket connections, use wss://api-base-mainnet-archive.n.dwellir.com/<your-api-key>. The API is fully compatible with standard Ethereum JSON-RPC methods.

Base Mainnet uses Chain ID 8453 with ETH as the native token and ~2 second block times. Base Sepolia testnet uses Chain ID 84532. Built on Optimism's OP Stack, Base is part of the Superchain ecosystem and is backed by Coinbase. As an Optimistic Rollup, withdrawals to Ethereum L1 require a ~7 day challenge period. Block explorers: basescan.org (mainnet) and sepolia.basescan.org (Sepolia).

Dwellir's Base endpoints are fully compatible with standard EVM tooling including Web3.js, ethers.js, viem, and Web3.py. Development frameworks like Hardhat, Foundry, and Truffle work seamlessly. Coinbase Wallet and OnchainKit provide additional Base-specific functionality. Simply configure your provider with the Dwellir RPC URL and your API key.

EIP-4844 dramatically reduced L1 data costs for Base and other L2 rollups by introducing 'blobs'—temporary data chunks that are cheaper than calldata. Since the Dencun upgrade, Base transactions are 10-100x cheaper because rollup data is posted as blobs instead of calldata. Your application code doesn't need changes to benefit; the sequencer automatically uses blob transactions. L2 execution fees remain the same, but the L1 data posting component (visible in transaction receipts as 'l1Fee') is significantly reduced.

Base uses EIP-1559 gas pricing with a dynamically adjusting base fee. 'Transaction underpriced' means your maxFeePerGas is below the current block's base fee. On L2s like Base, the base fee can spike during high demand. To fix: 1) Fetch the current base fee using eth_gasPrice or eth_feeHistory, 2) Set maxFeePerGas at least 20-30% higher than the current base fee to account for fluctuations, 3) Include a reasonable maxPriorityFeePerGas (typically 0.001-0.1 gwei on Base). For time-sensitive transactions, doubling the base fee ensures inclusion across several full blocks.