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H2 Lambda

Add H2 Lambda to Your Wallet — MetaMask, OKX, Rabby, Trust Wallet

Chain ID: 25821·Symbol: H2

H2 Lambda is an EVM-compatible blockchain with Chain ID 25821 and native token H2. This page lets you add H2 Lambda to MetaMask, Rabby Wallet, OKX Wallet or Trust Wallet in one click — no manual Chain ID or RPC entry required.

RPC Endpoints
https://rpc.h-1.io

Block Explorer

H2Scan

What is H2 Lambda?

H2 Lambda is an EVM (Ethereum Virtual Machine) compatible blockchain network. Any EVM wallet — MetaMask, Rabby, OKX Wallet, Trust Wallet, Coinbase Wallet — can connect and transact on H2 Lambda once you add the network configuration.

Why do you need to add H2 Lambda to your wallet?

MetaMask and most wallets only come pre-configured with Ethereum Mainnet. To transact, swap tokens, or use dApps on H2 Lambda, you need to add the network first. Entering an incorrect Chain ID or RPC can put your assets at risk. Use the "Add to wallet" button above — data sourced directly from chainid.network, the canonical Ethereum chain registry.

How to add H2 Lambda to your wallet

  1. 1

    Click Add to wallet

    Press the "Add to wallet" button above. MetaMask, OKX Wallet, Rabby Wallet or Trust Wallet will show a popup asking you to confirm adding the H2 Lambda network.

  2. 2

    Confirm in your wallet

    Your wallet shows the H2 Lambda network details: Chain ID 25821, native token H2. Verify the Chain ID is correct, then click "Approve" or "Add Network".

  3. 3

    Switch to the new network

    After confirming, your wallet automatically switches to H2 Lambda. You can start transacting right away — you will need H2 to pay gas fees.

H2 Lambda network technical details

To add manually, go to Settings → Networks → Add Network in MetaMask (or your wallet's equivalent) and enter the details below:

NameH2 Lambda
Chain ID25821
Native tokenH2
Decimals18
RPC Endpointhttps://rpc.h-1.io
Block Explorerhttps://lambda.h2scan.io

Important notice

  • •Always verify Chain ID 25821 before confirming — attackers sometimes create fake networks with similar names but different Chain IDs
  • •You need H2 tokens in your wallet to pay gas fees for transactions on H2 Lambda
  • •Data on this page is sourced from chainid.network — the community-verified Ethereum chain registry
  • •If the "Add to wallet" button doesn't work, your wallet may not support wallet_addEthereumChain — add the network manually using the details below

Frequently asked questions

Is it safe to add H2 Lambda to MetaMask?▾
Yes, if you use the "Add to wallet" button on this page. Data is sourced from chainid.network — the community-audited Ethereum registry. Adding a network does not expose your private key or grant any permissions to the dApp.
What is H2 Lambda Chain ID?▾
The Chain ID of H2 Lambda is 25821. This unique number identifies the network and prevents MetaMask and other EVM wallets from mixing up transactions across different chains.
Do I need H2 tokens to use H2 Lambda?▾
Yes. Every transaction on H2 Lambda requires H2 to pay gas fees. You can purchase H2 on exchanges and bridge it to H2 Lambda, or use a faucet if this is a testnet.
What is the H2 Lambda RPC endpoint?▾
An RPC endpoint is the server address your wallet uses to communicate with the H2 Lambda blockchain — sending transactions, reading balances, and checking state. One popular H2 Lambda RPC is https://rpc.h-1.io. This page shows live latency for each RPC so you can pick the fastest one.
My wallet says H2 Lambda already exists when I click Add — what do I do?▾
That's completely normal. If H2 Lambda is already in your wallet, it will simply switch to that network instead of adding a duplicate — no error or conflict.
I added H2 Lambda but the network won't load — what's wrong?▾
The most common cause is a broken or overloaded RPC endpoint. Your wallet uses RPC to connect to the blockchain — if the RPC is down, the network won't load even if it was added correctly. Fix: copy a different RPC from the list above (prefer green low-latency ones), then go to Settings → Networks in your wallet and replace the old RPC with the new one. Watch the tutorial video above for step-by-step instructions on updating your RPC.