Chains

A chain is a key from @agntn/chains, so normalizeChain("btc"), normalizeChain("mainnet") and normalizeChain("Arbitrum One") all land on the same canonical name, and a typo throws instead of quietly reading another network. Below, every chain at least one provider claims, straight from builtins. A lit operation means some provider serves it on that chain; the provider pages say which one and with what key.

chains29 chains · registry order

		Operations
Ethereumethereum	etherscan blockscout blockchair	bal: served his: served tx: served utx: absent con: served tok: served trf: served gas: served blk: served	8 of 9
Basebase	etherscan blockscout	bal: served his: served tx: served utx: absent con: served tok: served trf: served gas: served blk: served	8 of 9
Arbitrum Onearbitrum	etherscan blockscout	bal: served his: served tx: served utx: absent con: served tok: served trf: served gas: served blk: served	8 of 9
Optimismoptimism	etherscan blockscout	bal: served his: served tx: served utx: absent con: served tok: served trf: served gas: served blk: served	8 of 9
Polygon PoSpolygon	etherscan blockscout	bal: served his: served tx: served utx: absent con: served tok: served trf: served gas: served blk: served	8 of 9
BNB Chainbsc	etherscan	bal: served his: served tx: served utx: absent con: served tok: served trf: served gas: served blk: served	8 of 9
Avalanche C-Chainavalanche	etherscan blockscout	bal: served his: served tx: served utx: absent con: served tok: served trf: served gas: served blk: served	8 of 9
Gnosis Chaingnosis	etherscan blockscout	bal: served his: served tx: served utx: absent con: served tok: served trf: served gas: served blk: served	8 of 9
Linealinea	etherscan blockscout	bal: served his: served tx: served utx: absent con: served tok: served trf: served gas: served blk: served	8 of 9
Berachainberachain	etherscan	bal: served his: served tx: served utx: absent con: served tok: served trf: served gas: served blk: served	8 of 9
Scrollscroll	blockscout	bal: served his: served tx: served utx: absent con: served tok: served trf: served gas: served blk: served	8 of 9
zkSync Erazksync	blockscout	bal: served his: served tx: served utx: absent con: served tok: served trf: served gas: served blk: served	8 of 9
Bitcoinbitcoin	blockchair mempool blockstream	bal: served his: served tx: served utx: served con: absent tok: absent trf: absent gas: served blk: served	6 of 9
Bitcoin Cashbitcoincash	blockchair haskoin	bal: served his: served tx: served utx: served con: absent tok: absent trf: absent gas: absent blk: served	5 of 9
Litecoinlitecoin	blockchair mempool	bal: served his: served tx: served utx: served con: absent tok: absent trf: absent gas: served blk: served	6 of 9
eCashecash	blockchair	bal: served his: served tx: served utx: absent con: absent tok: absent trf: absent gas: absent blk: served	4 of 9
Zcashzcash	blockchair	bal: served his: served tx: served utx: absent con: absent tok: absent trf: absent gas: absent blk: served	4 of 9
Pepecoinpepecoin	mempool	bal: served his: served tx: served utx: served con: absent tok: absent trf: absent gas: served blk: served	6 of 9
Solanasolana	solscan helius	bal: served his: served tx: served utx: absent con: absent tok: served trf: absent gas: absent blk: served	5 of 9
TON (The Open Network)ton	ton	bal: served his: served tx: absent utx: absent con: absent tok: absent trf: absent gas: absent blk: absent	2 of 9
TRONtron	tronscan	bal: served his: served tx: served utx: absent con: absent tok: absent trf: absent gas: absent blk: served	4 of 9
Aptosaptos	aptos	bal: absent his: absent tx: absent utx: absent con: absent tok: absent trf: absent gas: absent blk: absent	0 of 9
Suisui	blockberry	bal: served his: served tx: absent utx: absent con: absent tok: absent trf: absent gas: absent blk: absent	2 of 9
Cardanocardano	koios	bal: served his: served tx: served utx: absent con: absent tok: served trf: absent gas: absent blk: absent	4 of 9
Arweavearweave	arweave	bal: served his: served tx: served utx: absent con: absent tok: absent trf: absent gas: absent blk: served	4 of 9
Decreddecred	dcrdata	bal: served his: served tx: served utx: absent con: absent tok: absent trf: absent gas: absent blk: served	4 of 9
Stellarstellar	horizon	bal: served his: served tx: served utx: absent con: absent tok: served trf: served gas: served blk: served	7 of 9
Bitcoin SVbitcoinsv	whatsonchain	bal: served his: served tx: served utx: served con: absent tok: absent trf: absent gas: absent blk: served	5 of 9
Bitcoin Goldbitcoingold	blockbook	bal: served his: served tx: served utx: served con: absent tok: absent trf: absent gas: absent blk: served	5 of 9

Reading the table

Two providers on one chain means a fallback exists. Ethereum and Bitcoin have three each, and a rate limit, no answer or a 5xx on the first moves the read to the next one, once.
One provider means an outage on that explorer is your outage. Solana has two only if you count Helius, which has no balance endpoint.
A row with nothing lit is Aptos. The provider is registered, its capabilities are all false and the required methods throw UnsupportedOperationError. That's deliberate and the Aptos page says why.
Unspent outputs come from Mempool and Blockstream on the Bitcoin family from WhatsOnChain on Bitcoin SV, from Blockbook on Bitcoin Gold and from Haskoin on Bitcoin Cash, and nowhere else. Decred is a UTXO chain too, but dcrdata doesn't serve them yet, so its cell stays dark.
Decimals differ. balance is a string in the smallest unit; formatWei(value, decimals) needs 8 for BTC, BSV, BTG, ZEC and DCR, 9 for SOL, 12 for AR, 6 for ADA, 7 for XLM and the token's own value for everything else. Nothing on this site rounds a raw amount.

Aliases that work

normalizeChain() takes the display name, the key and the aliases people actually type: eth, mainnet, arb, op, matic, btc, bsv, btg, zec, ltc, sol, apt, dcr, xlm, coinbase for Base. Missing input defaults to ethereum. The empty string throws.

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