About Us
What Arcscan is
Arcscan indexes Arc Testnet and publishes every block, transaction, address, contract and token on it as a page anyone can read or link to. There is no account to create and no paywall. The same data is served by a REST API, documented here in full — it is not open to callers outside this site yet, and there is no date for that.
Arc, the stablecoin-native layer-1 blockchain built by Circle, is unusual in ways that break an explorer built on Ethereum assumptions, and this one is built around those differences rather than around them. Gas is paid in USDC, not a volatile asset, so a fee is a dollar figure rather than an amount needing an exchange rate. Consensus is Malachite BFT, so a block is final the moment it exists — there is no confirmation countdown to watch and no reorganisation to wait out. There is no public mempool, so there is no pending-transaction feed. Blocks land roughly every 508 ms.
Features that depend on things Arc does not have — pending transactions, uncles, blobs, a confirmations counter — are absent, not greyed out. A control that can never work is worse than no control: it tells a reader the chain has a property it does not have. The knowledge base explains each of these in full.
Where each number comes from
- Arc node
Blocks, transactions, receipts, logs, balances, contract code, call traces.
Read from a full node we operate, on demand. This is the chain's own answer — if it disagrees with the chain, it is a bug, not a lag.
- Arcscan index
Address history, token transfer lists, holder counts, leaderboards, charts.
Derived by scanning blocks into our own database. It can be behind the head, and pages built on it say how far. Live coverage is on the network status page.
- Not available
Verified contract source, entity labels ("Binance 7"), token prices, NFT metadata.
This release does not have these. Where a page would show one, it says so rather than guessing — an invented label is indistinguishable from a researched one.
What we will not do
- Invent an attribution. An address is labelled only when the chain proves the label — a validator that proposed blocks, a system precompile, a contract we watched being deployed. There is no curated exchange-wallet list, because a guessed label reads exactly like a researched one.
- Print a price we did not measure. Native amounts on Arc are dollars by construction, so they need no oracle. Everything else is shown in its own units.
- Round a balance into a lie. Every amount is integer arithmetic at the decimal scale the contract itself declares. The same USDC balance appears with 18 decimals natively and 6 through the ERC-20 face; Arcscan counts it once.
- Take your keys. There is no wallet connection anywhere on this site, and no page will ever ask you to sign or approve anything.
Network and release
This site serves Arc Testnet, chain ID 5042002. Which chain a worker serves is asked of the API on every request, so the network named in the header is always the network the data on the page came from. Arc is served by a separate site with its own database and its own index; the network menu in the header links to it.
Live head height, indexer lag and component health are on the network status page. Found something wrong? The contact routes are listed, and security issues have their own path via bug bounty.
Arcscan's account on X is @arcscanio, and it is the only one this site publishes.