Supported networks
The Bloxchain Platform and the official Protocol deployments run on Sepolia today. Ethereum mainnet is coming soon.
Alpha · Testnet · Local-first. Use test funds only during alpha.
Networks
Sepolia (Ethereum testnet)
11155111
Supported
Official Protocol deployments; the network every preset on Discover deploys to
Custom EVM networks
Any
You add them
Stored on this device (or shared by an organization). No official Protocol deployment is provided; you supply the contract addresses
To get Sepolia test ETH, use any public Sepolia faucet. Most faucets ask you to sign in with a wallet or an account and rate-limit requests. You need enough for a deployment and a handful of transactions.
Adding a custom network
Go to Settings → Networks and choose Add network. Provide the network name, chain ID, RPC URL, an optional block explorer URL, the currency name, symbol and decimals, and whether it is a testnet or your default network. Networks you add are stored in this browser and used for reads and wallet switching. Clearing site data removes them, so export a backup from Settings → Backup. See Networks.
How the Platform talks to a network
The Platform prefers the RPC endpoint of your connected wallet for both reads and writes. A public RPC is used as a fallback when no wallet is connected, so reads still work signed out. You pay gas from your own wallet for every transaction you submit; there is no hidden relay unless you opt into the optional Bloxchain broadcaster where it is available.
If your wallet is on a network the Platform does not recognise, the top bar shows Wrong network. Switch your wallet to Sepolia, or add the network under Settings → Networks.
Official addresses
The Platform deploys accounts with the official factory, BasicFactory, which mints a BasicAccount. Their addresses, with EngineBlox and the definition libraries, are printed once, with every other number and default the Platform enforces, on Limits and defaults. The factory and template also appear under Technical in a preset's details drawer on Discover, and in the Advanced section of the deploy dialog.
Sepolia also carries the developer toolkit (the CopyBlox factory and the AccountBlox template) for experiments. It is Sepolia only and is not the default Platform path. See Deploy the Protocol.
Published address catalog
The official addresses ship in the @bloxchain/contracts npm package as official-deployed-addresses.json. The catalog contracts have the same address on every network it lists. This list is the address catalog, not the list of networks the Platform supports: the Platform runs on Sepolia today and Ethereum mainnet is coming soon.
sepolia
11155111
base-sepolia
84532
optimism-sepolia
11155420
arbitrum-sepolia
421614
arc-testnet
5042002
robinhood-testnet
46630
mainnet
1
base
8453
arbitrum
42161
optimism
10
polygon
137
bsc
56
avalanche
43114
arc
5042
robinhood
4663
A chain that is not in the catalog, such as a local test chain, has no official addresses; use the deployed-addresses.json from your own deploy.
Reference prices
The Value column on Assets shows a reference price from CoinGecko. Prices resolve on Ethereum and Arbitrum One only. Every other network, Sepolia included, shows a dash: the price map is fail-closed, so a chain that is not one of those two is never quoted. Reference prices are indicative only.
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