Chain Details

Add SPACE OS Testnet to your EVM wallet.

Wallet configuration

Notes

• The chain uses legacy transactions only — EIP-1559 (maxFeePerGas / maxPriorityFeePerGas) is not supported. Set a fixed gasPrice of 150 gwei when constructing transactions.
• Block time is sub-second; transactions confirm quickly.
• Chain ID 800000 was selected to be unique across major EVM networks.

Add via wallet UI

In MetaMask:

1. Open Settings → Networks → Add a network → Add a network manually
2. Paste the values from the table above
3. Save and switch to "SPACE OS Testnet"

In code (ethers v6)

import { JsonRpcProvider, Wallet } from "ethers";

const provider = new JsonRpcProvider("https://testnet.evm.spaceos.com");
const wallet = new Wallet(privateKey, provider);

const tx = await wallet.sendTransaction({
  to: "0x...",
  value: 0n,
  gasPrice: 150_000_000_000n, // 150 gwei, legacy
});