Sepolia Chain ID (11155111) & RPC URL: Add Sepolia Testnet to MetaMask

Network settings for Sepolia: chain ID 11155111, a working RPC URL and the explorer. Add it to MetaMask in one click, or copy the fields below.

  • Chain ID11155111
  • Hex0xaa36a7
  • Gas tokenETH
  • RPC checkedOctober 27

Non-custodial · you sign every transaction0.7% service fee, shown before you confirm

By Step Exchange Research · Updated October 27, 2026

The Sepolia chain ID is 11155111 (0xaa36a7 in hex). Sepolia is the main public Ethereum testnet for apps and smart contracts. Its ETH has no market value and comes from faucets. Below are the exact settings MetaMask asks for, public RPC endpoints we tested on October 27, 2026, and a one-click button to add the network.

Sepolia Network Details for MetaMask

FieldValue
Network nameSepolia
RPC URLhttps://rpc.sepolia.ethpandaops.io
Chain ID11155111
Currency symbolETH
Block explorerhttps://sepolia.etherscan.io

Copy these values exactly. If the RPC URL returns a different chain ID than the one you enter, MetaMask stops with a chain ID mismatch warning: that usually means a typo or an RPC for another network.

Sepolia RPC URLs (Tested October 27, 2026)

RPC endpointReturned chain IDResponse time
https://rpc.sepolia.ethpandaops.io11155111225 ms
https://ethereum-sepolia-rpc.publicnode.com11155111252 ms
https://sepolia.gateway.tenderly.co11155111328 ms

We sent eth_chainId and eth_blockNumber to each endpoint from Europe on October 27, 2026; the table lists only endpoints that answered with chain ID 11155111. The latest block was 12,005,806. Public endpoints are free and rate limited: for an app or a bot, use a paid provider or your own node.

How to Add Sepolia to MetaMask

  1. Click Add Sepolia to MetaMask above, or open MetaMask and go to Networks → Add a custom network.
  2. Enter the network name Sepolia, RPC URL https://rpc.sepolia.ethpandaops.io and chain ID 11155111.
  3. Set the currency symbol to ETH and the block explorer to https://sepolia.etherscan.io.
  4. Save and switch to the new network. Your 0x address is the same as on other EVM networks.

Tip: Sepolia ETH is free test money: never buy it. MetaMask lists Sepolia under test networks once you turn on “Show test networks”.

How to Get ETH on Sepolia

Sepolia ETH comes from faucets, such as the ones run by Alchemy, Infura and Google Cloud, which usually ask for a small mainnet balance or a sign-in. It cannot be bought or bridged from mainnet through our widget.

FAQ

What is the Sepolia chain ID?

The Sepolia chain ID is 11155111, or 0xaa36a7 in hexadecimal. Wallets use it to make sure a transaction is signed for Sepolia and not another network.

What is the Sepolia RPC URL?

A working public RPC URL is https://rpc.sepolia.ethpandaops.io. We tested it on October 27, 2026: it returned chain ID 11155111. Other working endpoints are listed in the table on this page.

How do I add Sepolia to MetaMask?

Click "Add Sepolia to MetaMask" on this page and approve the request in MetaMask. To add it manually, go to Networks, then Add a custom network, and enter the network name, RPC URL https://rpc.sepolia.ethpandaops.io, chain ID 11155111, currency symbol ETH and the explorer URL.

What token do I need for gas on Sepolia?

Gas on Sepolia is paid in ETH. Keep a small amount in your wallet, otherwise you cannot send or swap the tokens you hold there.

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