Question 1

What is an RPC endpoint for Ethereum?

Accepted Answer

An RPC (Remote Procedure Call) endpoint is a URL that allows your application to communicate with the Ethereum blockchain. Through RPC endpoints, you can read blockchain data, submit transactions, query account balances, and interact with smart contracts without running your own Ethereum node.

Question 2

What are the best free Ethereum RPC endpoints?

Accepted Answer

RPC Directory lists multiple free public Ethereum endpoints you can use for development and low-traffic applications. Public endpoints are rate-limited and may experience downtime during high traffic. For production applications, consider using a paid RPC provider for better reliability and higher rate limits.

Question 3

What is the Ethereum chain ID?

Accepted Answer

The Ethereum Holesky chain ID is 17000. This unique identifier is used by wallets like MetaMask to connect to the correct network and prevent transaction replay attacks between different EVM chains.

Question 4

How do I add Ethereum to MetaMask or other wallets?

Accepted Answer

To add Ethereum Holesky to your wallet, use our one-click wallet integration at /add - it works with MetaMask, Rainbow, Coinbase Wallet, and other popular wallets. Or manually: 1) Open your wallet and find the network settings. 2) Click "Add Network". 3) Enter the network name "Ethereum Holesky", RPC URL (copy one from this page), Chain ID "17000", and currency symbol "ETH". 4) Save.

Question 5

How do I connect to Ethereum with ethers.js or web3.js?

Accepted Answer

To connect with ethers.js: `const provider = new ethers.JsonRpcProvider("YOUR_RPC_URL")`. For web3.js: `const web3 = new Web3("YOUR_RPC_URL")`. Replace YOUR_RPC_URL with any endpoint from this page. For production, use a provider with an API key for better rate limits.

Question 6

How do I get free Ethereum testnet tokens?

Accepted Answer

You can get free Ethereum Holesky testnet tokens from the official faucet. Visit the faucet link in the Resources section above. Testnet tokens have no real value and are only for testing and development purposes.

Question 7

What's the difference between Ethereum mainnet and testnet?

Accepted Answer

Ethereum mainnet is the production network where real transactions with actual value occur. Testnets like Holesky are testing environments with tokens that have no real value. Always test your applications on testnet before deploying to mainnet to avoid costly mistakes.

Question 8

What's the difference between free and paid Ethereum RPC providers?

Accepted Answer

Free public endpoints have rate limits (typically 10-100 requests/second), may experience downtime during high traffic, and offer limited features. Paid providers offer higher rate limits (1000+ RPS), better reliability with SLAs, additional features like archive data access, WebSocket connections, and dedicated support. Use the pricing calculator above to compare costs.

Question 9

Does Ethereum support WebSocket connections?

Accepted Answer

Many Ethereum RPC providers offer WebSocket (WSS) endpoints for real-time subscriptions to new blocks, pending transactions, and contract events. WebSocket connections are ideal for applications that need instant updates without polling. Check the endpoints list above for available WSS URLs.

PROVIDER--	TYPE/\	FREE TIER--	STARTING--	NETWORKS--	ACTIONS
Dwellir	flat(?)	5,000,000/mo	$49/mo	1	[signup][pricing][web]
Chainstack	flat(?)	3,000,000/mo	$49/mo	1	[signup][pricing][web]
Tatum	compute(?)	100,000 CU	$49/mo	1	[signup][pricing][web]
Infura	compute(?)	180,000,000 CU	$50/mo	1	[signup][pricing][web]
Alchemy	compute(?)	30,000,000 CU	$5/mo	1	[signup][pricing][web]
DRPC	compute(?)	210,000,000 CU	--	1	[signup][pricing][web]

Ethereum Holesky RPC Endpoints

Public Endpoints

Resources

Pricing Calculator

Estimated Monthly Cost for 1,000,000 requests:

Paid Providers

FAQ

Public Endpoints

Resources

Pricing Calculator

Estimated Monthly Cost for 1,000,000 requests:

Paid Providers

FAQ

Q1What is an RPC endpoint for Ethereum?

Q2What are the best free Ethereum RPC endpoints?

Q3What is the Ethereum chain ID?

Q4How do I add Ethereum to MetaMask or other wallets?

Q5How do I connect to Ethereum with ethers.js or web3.js?

Q6How do I get free Ethereum testnet tokens?

Q7What's the difference between Ethereum mainnet and testnet?

Q8What's the difference between free and paid Ethereum RPC providers?

Q9Does Ethereum support WebSocket connections?

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